/*
 * Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibTest/TestCase.h>

#include <AK/ByteString.h>
#include <AK/OwnPtr.h>
#include <AK/ReverseIterator.h>
#include <AK/String.h>
#include <AK/Vector.h>

static bool is_inline_element(auto& el, auto& vector)
{
    uintptr_t vector_ptr = (uintptr_t)&vector;
    uintptr_t element_ptr = (uintptr_t)&el;
    return (element_ptr >= vector_ptr && element_ptr < (vector_ptr + sizeof(vector)));
}

#define DECLARE_TESTS_FOR_VEC(Vector)                                                                                                    \
    TEST_CASE(Vector##_construct)                                                                                                        \
    {                                                                                                                                    \
        EXPECT(Vector<int>().is_empty());                                                                                                \
        EXPECT(Vector<int>().size() == 0);                                                                                               \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_ints)                                                                                                             \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        ints.append(1);                                                                                                                  \
        ints.append(2);                                                                                                                  \
        ints.append(3);                                                                                                                  \
        EXPECT_EQ(ints.size(), 3u);                                                                                                      \
        EXPECT_EQ(ints.take_last(), 3);                                                                                                  \
        EXPECT_EQ(ints.size(), 2u);                                                                                                      \
        EXPECT_EQ(ints.take_last(), 2);                                                                                                  \
        EXPECT_EQ(ints.size(), 1u);                                                                                                      \
        EXPECT_EQ(ints.take_last(), 1);                                                                                                  \
        EXPECT_EQ(ints.size(), 0u);                                                                                                      \
                                                                                                                                         \
        ints.clear();                                                                                                                    \
        EXPECT_EQ(ints.size(), 0u);                                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_strings)                                                                                                          \
    {                                                                                                                                    \
        Vector<ByteString> strings;                                                                                                      \
        strings.append("ABC");                                                                                                           \
        strings.append("DEF");                                                                                                           \
                                                                                                                                         \
        int loop_counter = 0;                                                                                                            \
        for (ByteString const& string : strings) {                                                                                       \
            EXPECT(!string.is_empty());                                                                                                  \
            ++loop_counter;                                                                                                              \
        }                                                                                                                                \
                                                                                                                                         \
        loop_counter = 0;                                                                                                                \
        for (auto& string : (const_cast<Vector<ByteString> const&>(strings))) {                                                          \
            EXPECT(!string.is_empty());                                                                                                  \
            ++loop_counter;                                                                                                              \
        }                                                                                                                                \
        EXPECT_EQ(loop_counter, 2);                                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_conforms_to_iterator_protocol)                                                                                    \
    {                                                                                                                                    \
        static_assert(std::random_access_iterator<Vector<int>::Iterator>);                                                               \
        static_assert(std::random_access_iterator<Vector<int>::ConstIterator>);                                                          \
        static_assert(std::random_access_iterator<Vector<int const>::Iterator>);                                                         \
        static_assert(std::random_access_iterator<Vector<int const>::ConstIterator>);                                                    \
                                                                                                                                         \
        static_assert(std::random_access_iterator<Vector<String>::Iterator>);                                                            \
        static_assert(std::random_access_iterator<Vector<String>::ConstIterator>);                                                       \
        static_assert(std::random_access_iterator<Vector<String const>::Iterator>);                                                      \
        static_assert(std::random_access_iterator<Vector<String const>::ConstIterator>);                                                 \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_strings_insert_ordered)                                                                                           \
    {                                                                                                                                    \
        Vector<ByteString> strings;                                                                                                      \
        strings.append("abc");                                                                                                           \
        strings.append("def");                                                                                                           \
        strings.append("ghi");                                                                                                           \
                                                                                                                                         \
        strings.insert_before_matching("f-g"sv, [](auto& entry) {                                                                        \
            return "f-g"sv < entry;                                                                                                      \
        });                                                                                                                              \
                                                                                                                                         \
        EXPECT_EQ(strings[0], "abc");                                                                                                    \
        EXPECT_EQ(strings[1], "def");                                                                                                    \
        EXPECT_EQ(strings[2], "f-g");                                                                                                    \
        EXPECT_EQ(strings[3], "ghi");                                                                                                    \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_prepend_vector)                                                                                                   \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        ints.append(1);                                                                                                                  \
        ints.append(2);                                                                                                                  \
        ints.append(3);                                                                                                                  \
                                                                                                                                         \
        Vector<int> more_ints;                                                                                                           \
        more_ints.append(4);                                                                                                             \
        more_ints.append(5);                                                                                                             \
        more_ints.append(6);                                                                                                             \
                                                                                                                                         \
        ints.prepend(move(more_ints));                                                                                                   \
                                                                                                                                         \
        EXPECT_EQ(ints.size(), 6u);                                                                                                      \
        EXPECT_EQ(more_ints.size(), 0u);                                                                                                 \
                                                                                                                                         \
        EXPECT_EQ(ints[0], 4);                                                                                                           \
        EXPECT_EQ(ints[1], 5);                                                                                                           \
        EXPECT_EQ(ints[2], 6);                                                                                                           \
        EXPECT_EQ(ints[3], 1);                                                                                                           \
        EXPECT_EQ(ints[4], 2);                                                                                                           \
        EXPECT_EQ(ints[5], 3);                                                                                                           \
                                                                                                                                         \
        ints.prepend(move(more_ints));                                                                                                   \
        EXPECT_EQ(ints.size(), 6u);                                                                                                      \
        EXPECT_EQ(more_ints.size(), 0u);                                                                                                 \
                                                                                                                                         \
        more_ints.prepend(move(ints));                                                                                                   \
        EXPECT_EQ(more_ints.size(), 6u);                                                                                                 \
        EXPECT_EQ(ints.size(), 0u);                                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_prepend_vector_object)                                                                                            \
    {                                                                                                                                    \
        struct SubObject {                                                                                                               \
            SubObject(int v)                                                                                                             \
                : value(v)                                                                                                               \
            {                                                                                                                            \
            }                                                                                                                            \
            int value { 0 };                                                                                                             \
        };                                                                                                                               \
        struct Object {                                                                                                                  \
            Object(NonnullOwnPtr<SubObject>&& a_subobject)                                                                               \
                : subobject(move(a_subobject))                                                                                           \
            {                                                                                                                            \
            }                                                                                                                            \
            OwnPtr<SubObject> subobject;                                                                                                 \
        };                                                                                                                               \
                                                                                                                                         \
        Vector<Object> objects;                                                                                                          \
        objects.empend(make<SubObject>(1));                                                                                              \
        objects.empend(make<SubObject>(2));                                                                                              \
        objects.empend(make<SubObject>(3));                                                                                              \
                                                                                                                                         \
        EXPECT_EQ(objects.size(), 3u);                                                                                                   \
                                                                                                                                         \
        Vector<Object> more_objects;                                                                                                     \
        more_objects.empend(make<SubObject>(4));                                                                                         \
        more_objects.empend(make<SubObject>(5));                                                                                         \
        more_objects.empend(make<SubObject>(6));                                                                                         \
        EXPECT_EQ(more_objects.size(), 3u);                                                                                              \
                                                                                                                                         \
        objects.prepend(move(more_objects));                                                                                             \
        EXPECT_EQ(more_objects.size(), 0u);                                                                                              \
        EXPECT_EQ(objects.size(), 6u);                                                                                                   \
                                                                                                                                         \
        EXPECT_EQ(objects[0].subobject->value, 4);                                                                                       \
        EXPECT_EQ(objects[1].subobject->value, 5);                                                                                       \
        EXPECT_EQ(objects[2].subobject->value, 6);                                                                                       \
        EXPECT_EQ(objects[3].subobject->value, 1);                                                                                       \
        EXPECT_EQ(objects[4].subobject->value, 2);                                                                                       \
        EXPECT_EQ(objects[5].subobject->value, 3);                                                                                       \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_vector_compare)                                                                                                   \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        Vector<int> same_ints;                                                                                                           \
                                                                                                                                         \
        for (int i = 0; i < 1000; ++i) {                                                                                                 \
            ints.append(i);                                                                                                              \
            same_ints.append(i);                                                                                                         \
        }                                                                                                                                \
                                                                                                                                         \
        EXPECT_EQ(ints.size(), 1000u);                                                                                                   \
        EXPECT_EQ(ints, same_ints);                                                                                                      \
                                                                                                                                         \
        Vector<ByteString> strings;                                                                                                      \
        Vector<ByteString> same_strings;                                                                                                 \
                                                                                                                                         \
        for (int i = 0; i < 1000; ++i) {                                                                                                 \
            strings.append(ByteString::number(i));                                                                                       \
            same_strings.append(ByteString::number(i));                                                                                  \
        }                                                                                                                                \
                                                                                                                                         \
        EXPECT_EQ(strings.size(), 1000u);                                                                                                \
        EXPECT_EQ(strings, same_strings);                                                                                                \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_grow_past_inline_capacity)                                                                                        \
    {                                                                                                                                    \
        auto make_vector = [] {                                                                                                          \
            Vector<ByteString, 16> strings;                                                                                              \
            for (int i = 0; i < 32; ++i) {                                                                                               \
                strings.append(ByteString::number(i));                                                                                   \
            }                                                                                                                            \
            return strings;                                                                                                              \
        };                                                                                                                               \
                                                                                                                                         \
        auto strings = make_vector();                                                                                                    \
                                                                                                                                         \
        EXPECT_EQ(strings.size(), 32u);                                                                                                  \
        EXPECT_EQ(strings[31], "31");                                                                                                    \
                                                                                                                                         \
        strings.clear();                                                                                                                 \
        EXPECT_EQ(strings.size(), 0u);                                                                                                   \
        EXPECT_EQ(strings.capacity(), 16u);                                                                                              \
                                                                                                                                         \
        strings = make_vector();                                                                                                         \
                                                                                                                                         \
        strings.clear_with_capacity();                                                                                                   \
        EXPECT_EQ(strings.size(), 0u);                                                                                                   \
        EXPECT(strings.capacity() >= 32u);                                                                                               \
    }                                                                                                                                    \
                                                                                                                                         \
    BENCHMARK_CASE(Vector##_append_trivial)                                                                                              \
    {                                                                                                                                    \
        /* This should be super fast thanks to Vector using memmove. */                                                                  \
        Vector<int> ints;                                                                                                                \
        for (int i = 0; i < 1000000; ++i) {                                                                                              \
            ints.append(i);                                                                                                              \
        }                                                                                                                                \
        for (int i = 0; i < 100; ++i) {                                                                                                  \
            Vector<int> tmp;                                                                                                             \
            tmp.extend(ints);                                                                                                            \
            EXPECT_EQ(tmp.size(), 1000000u);                                                                                             \
        }                                                                                                                                \
    }                                                                                                                                    \
                                                                                                                                         \
    BENCHMARK_CASE(Vector##_remove_trivial)                                                                                              \
    {                                                                                                                                    \
        /* This should be super fast thanks to Vector using memmove. */                                                                  \
        Vector<int> ints;                                                                                                                \
        for (int i = 0; i < 10000; ++i) {                                                                                                \
            ints.append(i);                                                                                                              \
        }                                                                                                                                \
        while (!ints.is_empty()) {                                                                                                       \
            ints.remove(0);                                                                                                              \
        }                                                                                                                                \
        EXPECT_EQ(ints.size(), 0u);                                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    BENCHMARK_CASE(Vector##_remove_all_matching_trivial)                                                                                 \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        for (int i = 0; i < 10000; ++i) {                                                                                                \
            ints.append(i);                                                                                                              \
        }                                                                                                                                \
        ints.remove_all_matching([](int value) { return value % 2 == 0; });                                                              \
        EXPECT_EQ(ints.size(), 5000u);                                                                                                   \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_vector_remove)                                                                                                    \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        ints.append(1);                                                                                                                  \
        ints.append(2);                                                                                                                  \
        ints.append(3);                                                                                                                  \
        ints.append(4);                                                                                                                  \
        ints.append(5);                                                                                                                  \
                                                                                                                                         \
        ints.remove(1);                                                                                                                  \
        EXPECT_EQ(ints.size(), 4u);                                                                                                      \
        EXPECT_EQ(ints[0], 1);                                                                                                           \
        EXPECT_EQ(ints[1], 3);                                                                                                           \
        EXPECT_EQ(ints[2], 4);                                                                                                           \
        EXPECT_EQ(ints[3], 5);                                                                                                           \
                                                                                                                                         \
        ints.remove(0);                                                                                                                  \
        EXPECT_EQ(ints.size(), 3u);                                                                                                      \
        EXPECT_EQ(ints[0], 3);                                                                                                           \
        EXPECT_EQ(ints[1], 4);                                                                                                           \
        EXPECT_EQ(ints[2], 5);                                                                                                           \
                                                                                                                                         \
        ints.take_last();                                                                                                                \
        EXPECT_EQ(ints.size(), 2u);                                                                                                      \
        EXPECT_EQ(ints[0], 3);                                                                                                           \
        EXPECT_EQ(ints[1], 4);                                                                                                           \
                                                                                                                                         \
        ints.take_first();                                                                                                               \
        EXPECT_EQ(ints.size(), 1u);                                                                                                      \
        EXPECT_EQ(ints[0], 4);                                                                                                           \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_remove_all_matching)                                                                                              \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
                                                                                                                                         \
        ints.append(1);                                                                                                                  \
        ints.append(2);                                                                                                                  \
        ints.append(3);                                                                                                                  \
        ints.append(4);                                                                                                                  \
                                                                                                                                         \
        EXPECT_EQ(ints.size(), 4u);                                                                                                      \
                                                                                                                                         \
        EXPECT_EQ(ints.remove_all_matching([&](int value) { return value > 2; }), true);                                                 \
        EXPECT_EQ(ints.remove_all_matching([&](int) { return false; }), false);                                                          \
                                                                                                                                         \
        EXPECT_EQ(ints.size(), 2u);                                                                                                      \
                                                                                                                                         \
        EXPECT_EQ(ints.remove_all_matching([&](int) { return true; }), true);                                                            \
                                                                                                                                         \
        EXPECT(ints.is_empty());                                                                                                         \
                                                                                                                                         \
        EXPECT_EQ(ints.remove_all_matching([&](int) { return true; }), false);                                                           \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_nonnullownptrvector)                                                                                              \
    {                                                                                                                                    \
        struct Object {                                                                                                                  \
            ByteString string;                                                                                                           \
        };                                                                                                                               \
        Vector<NonnullOwnPtr<Object>> objects;                                                                                           \
                                                                                                                                         \
        objects.append(make<Object>());                                                                                                  \
        EXPECT_EQ(objects.size(), 1u);                                                                                                   \
                                                                                                                                         \
        OwnPtr<Object> o = make<Object>();                                                                                               \
        objects.append(o.release_nonnull());                                                                                             \
        EXPECT(o == nullptr);                                                                                                            \
        EXPECT_EQ(objects.size(), 2u);                                                                                                   \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_insert_trivial)                                                                                                   \
    {                                                                                                                                    \
        Vector<int> ints;                                                                                                                \
        ints.append(0);                                                                                                                  \
        ints.append(10);                                                                                                                 \
        ints.append(20);                                                                                                                 \
        ints.append(30);                                                                                                                 \
        ints.append(40);                                                                                                                 \
        ints.insert(2, 15);                                                                                                              \
        EXPECT_EQ(ints.size(), 6u);                                                                                                      \
        EXPECT_EQ(ints[0], 0);                                                                                                           \
        EXPECT_EQ(ints[1], 10);                                                                                                          \
        EXPECT_EQ(ints[2], 15);                                                                                                          \
        EXPECT_EQ(ints[3], 20);                                                                                                          \
        EXPECT_EQ(ints[4], 30);                                                                                                          \
        EXPECT_EQ(ints[5], 40);                                                                                                          \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_resize_initializes)                                                                                               \
    {                                                                                                                                    \
        struct A {                                                                                                                       \
            A() { initialized = true; }                                                                                                  \
            bool initialized { false };                                                                                                  \
        };                                                                                                                               \
                                                                                                                                         \
        Vector<A> ints;                                                                                                                  \
        ints.resize(32);                                                                                                                 \
                                                                                                                                         \
        for (size_t idx = 0; idx < 32; ++idx)                                                                                            \
            EXPECT(ints[idx].initialized);                                                                                               \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_compare_vectors_of_same_type)                                                                              \
    {                                                                                                                                    \
        Vector<int> a {};                                                                                                                \
        Vector<int> b {};                                                                                                                \
                                                                                                                                         \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        a.append(1);                                                                                                                     \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
                                                                                                                                         \
        b.append(1);                                                                                                                     \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        a.append(42);                                                                                                                    \
        b.append(17);                                                                                                                    \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_compare_vectors_of_different_inline_capacity)                                                              \
    {                                                                                                                                    \
        Vector<int, 1> a {};                                                                                                             \
        Vector<int, 64> b {};                                                                                                            \
                                                                                                                                         \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        a.append(1);                                                                                                                     \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
                                                                                                                                         \
        b.append(1);                                                                                                                     \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        a.append(42);                                                                                                                    \
        b.append(17);                                                                                                                    \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_compare_vectors_of_different_sizes)                                                                        \
    {                                                                                                                                    \
        Vector<int, 0> a {};                                                                                                             \
        Vector<int, 0> b {};                                                                                                             \
                                                                                                                                         \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        /* A is longer */                                                                                                                \
        a.append(1);                                                                                                                     \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
                                                                                                                                         \
        b.append(1);                                                                                                                     \
        EXPECT(a == b);                                                                                                                  \
        EXPECT(!(a != b));                                                                                                               \
                                                                                                                                         \
        /* B is longer */                                                                                                                \
        b.append(42);                                                                                                                    \
        EXPECT(!(a == b));                                                                                                               \
        EXPECT(a != b);                                                                                                                  \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_find_value)                                                                                                \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };                                                                                  \
                                                                                                                                         \
        auto const expected = v.begin() + 4;                                                                                             \
                                                                                                                                         \
        EXPECT_EQ(expected, v.find(0));                                                                                                  \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_find_predicate)                                                                                            \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };                                                                                  \
                                                                                                                                         \
        auto const expected = v.begin() + 4;                                                                                             \
                                                                                                                                         \
        EXPECT_EQ(expected, v.find_if([](auto const v) { return v == 0; }));                                                             \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_find_index)                                                                                                \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };                                                                                  \
                                                                                                                                         \
        EXPECT_EQ(4u, v.find_first_index(0).value());                                                                                    \
        EXPECT(!v.find_first_index(42).has_value());                                                                                     \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_find_predicate_index)                                                                                      \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };                                                                                  \
                                                                                                                                         \
        EXPECT_EQ(4u, v.find_first_index_if([](auto const v) { return v == 0; }).value());                                               \
        EXPECT(!v.find_first_index_if([](auto const v) { return v == 123; }).has_value());                                               \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_find_using_a_hashcompatible_value)                                                                         \
    {                                                                                                                                    \
        /* Tests whether a hash-compatible value can be used to compare (Strings cannot be implicitly constructed from a StringView.) */ \
        Vector v { "hello!"_string };                                                                                                    \
        EXPECT(v.contains_slow("hello!"sv));                                                                                             \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_contain_start)                                                                                             \
    {                                                                                                                                    \
        /* Tests whether value is found if at the start of the range. */                                                                 \
        Vector<int> v { 1, 2, 3, 4, 5 };                                                                                                 \
                                                                                                                                         \
        EXPECT(v.contains_in_range(1, 0, 4));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_contain_end)                                                                                               \
    {                                                                                                                                    \
        /* Tests whether value is found if at the end of the range. */                                                                   \
        Vector<int> v { 1, 2, 3, 4, 5 };                                                                                                 \
                                                                                                                                         \
        EXPECT(v.contains_in_range(5, 0, 4));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_contain_range)                                                                                             \
    {                                                                                                                                    \
        /* Tests whether value is found within a range. */                                                                               \
        Vector<int> v { 1, 2, 3, 4, 5 };                                                                                                 \
                                                                                                                                         \
        EXPECT(v.contains_in_range(3, 0, 4));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_not_contain_not_present)                                                                                   \
    {                                                                                                                                    \
        /* Tests whether a value that is not present is not found, as expected.*/                                                        \
        Vector<int> v { 1, 2, 3, 4, 5 };                                                                                                 \
                                                                                                                                         \
        EXPECT(!v.contains_in_range(6, 0, 4));                                                                                           \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_should_not_contain_present_not_in_range)                                                                          \
    {                                                                                                                                    \
        /* Tests whether a value that is present, but not in range, is not found.*/                                                      \
        Vector<int> v { 1, 2, 3, 4, 5 };                                                                                                 \
                                                                                                                                         \
        EXPECT(!v.contains_in_range(2, 2, 4));                                                                                           \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_can_store_references)                                                                                             \
    {                                                                                                                                    \
        int my_integer = 42;                                                                                                             \
        Vector<int&> references;                                                                                                         \
        references.append(my_integer);                                                                                                   \
        references.prepend(my_integer);                                                                                                  \
        EXPECT_EQ(&references.first(), &references.last());                                                                              \
                                                                                                                                         \
        {                                                                                                                                \
            Vector<int&> other_references;                                                                                               \
            other_references.extend(references);                                                                                         \
            EXPECT_EQ(&other_references.first(), &my_integer);                                                                           \
        }                                                                                                                                \
                                                                                                                                         \
        {                                                                                                                                \
            Vector<int&> other_references;                                                                                               \
            other_references = references;                                                                                               \
            EXPECT_EQ(&other_references.first(), &my_integer);                                                                           \
        }                                                                                                                                \
                                                                                                                                         \
        {                                                                                                                                \
            auto it = references.find(my_integer);                                                                                       \
            EXPECT(!it.is_end());                                                                                                        \
            EXPECT_EQ(*it, my_integer);                                                                                                  \
        }                                                                                                                                \
                                                                                                                                         \
        {                                                                                                                                \
            int other_integer = 42;                                                                                                      \
            auto index = references.find_first_index(other_integer);                                                                     \
            EXPECT(index.has_value());                                                                                                   \
            EXPECT_EQ(index.value_or(99999u), 0u);                                                                                       \
        }                                                                                                                                \
                                                                                                                                         \
        {                                                                                                                                \
            auto integer = 42;                                                                                                           \
            EXPECT(references.contains_slow(integer));                                                                                   \
        }                                                                                                                                \
                                                                                                                                         \
        {                                                                                                                                \
            references.remove(0);                                                                                                        \
            references.ensure_capacity(10);                                                                                              \
            EXPECT_EQ(&references.take_first(), &my_integer);                                                                            \
        }                                                                                                                                \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_reference_deletion_should_not_affect_object)                                                                      \
    {                                                                                                                                    \
        size_t times_deleted = 0;                                                                                                        \
        struct DeleteCounter {                                                                                                           \
            explicit DeleteCounter(size_t& deleted)                                                                                      \
                : deleted(deleted)                                                                                                       \
            {                                                                                                                            \
            }                                                                                                                            \
                                                                                                                                         \
            ~DeleteCounter()                                                                                                             \
            {                                                                                                                            \
                ++deleted;                                                                                                               \
            }                                                                                                                            \
                                                                                                                                         \
            size_t& deleted;                                                                                                             \
        };                                                                                                                               \
                                                                                                                                         \
        {                                                                                                                                \
            DeleteCounter counter { times_deleted };                                                                                     \
            Vector<DeleteCounter&> references;                                                                                           \
            for (size_t i = 0; i < 16; ++i)                                                                                              \
                references.append(counter);                                                                                              \
        }                                                                                                                                \
        EXPECT_EQ(times_deleted, 1u);                                                                                                    \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_rbegin)                                                                                                           \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 5, 6, 7, 8, 0 };                                                                                     \
                                                                                                                                         \
        auto const expected = v.begin() + 4;                                                                                             \
        auto const expected_in_reverse = v.rbegin() + 4;                                                                                 \
        EXPECT_EQ(*expected, *expected_in_reverse);                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_rend)                                                                                                             \
    {                                                                                                                                    \
        Vector<int> v { 1, 2, 3, 4, 5, 6, 7, 8, 0 };                                                                                     \
                                                                                                                                         \
        auto const expected = v.end() - 5;                                                                                               \
        auto const expected_in_reverse = v.rend() - 5;                                                                                   \
        EXPECT_EQ(*expected, *expected_in_reverse);                                                                                      \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_reverse_iterator_for_loop)                                                                                        \
    {                                                                                                                                    \
        Vector<int> v { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };                                                                                  \
        int index = 9;                                                                                                                   \
        for (auto rev = v.rbegin(); rev != v.rend(); ++rev)                                                                              \
            EXPECT_EQ(*rev, index--);                                                                                                    \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_reverse_range_for_loop)                                                                                           \
    {                                                                                                                                    \
        Vector<int> v { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };                                                                                  \
        int index = 9;                                                                                                                   \
        for (auto item : AK::ReverseWrapper::in_reverse(v))                                                                              \
            EXPECT_EQ(item, index--);                                                                                                    \
                                                                                                                                         \
        index = 9;                                                                                                                       \
        for (auto item : v.in_reverse())                                                                                                 \
            EXPECT_EQ(item, index--);                                                                                                    \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_uses_inline_capacity_when_appended_to)                                                                            \
    {                                                                                                                                    \
        Vector<int, 10> v;                                                                                                               \
        v.unchecked_append(1);                                                                                                           \
        v.unchecked_append(123);                                                                                                         \
        v.unchecked_append(50);                                                                                                          \
        v.unchecked_append(43);                                                                                                          \
                                                                                                                                         \
        for (auto& el : v)                                                                                                               \
            EXPECT(is_inline_element(el, v));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_uses_inline_capacity_when_constructed_from_initializer_list)                                                      \
    {                                                                                                                                    \
        Vector<int, 10> v { 10, 9, 3, 1, 3 };                                                                                            \
                                                                                                                                         \
        for (auto& el : v)                                                                                                               \
            EXPECT(is_inline_element(el, v));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_uses_inline_capacity_when_constructed_from_other_vector)                                                          \
    {                                                                                                                                    \
        Vector other { 4, 3, 2, 1 };                                                                                                     \
        Vector<int, 10> v(other);                                                                                                        \
                                                                                                                                         \
        for (auto& el : v)                                                                                                               \
            EXPECT(is_inline_element(el, v));                                                                                            \
    }                                                                                                                                    \
                                                                                                                                         \
    TEST_CASE(Vector##_uses_inline_capacity_when_constructed_from_span)                                                                  \
    {                                                                                                                                    \
        Array array { "f00", "bar", "baz" };                                                                                             \
        Vector<char const*, 10> v(array.span());                                                                                         \
                                                                                                                                         \
        for (auto& el : v)                                                                                                               \
            EXPECT(is_inline_element(el, v));                                                                                            \
    }                                                                                                                                    \
    TEST_CASE(Vector##_remove_all)                                                                                                       \
    {                                                                                                                                    \
        {                                                                                                                                \
            Vector<int> v0 { 1, 2, 3, 2, 4, 2, 5 };                                                                                      \
            Array indices { 1, 4, 6 };                                                                                                   \
            v0.remove_all(indices);                                                                                                      \
            EXPECT_EQ(v0.size(), 4u);                                                                                                    \
            EXPECT_EQ(v0[0], 1);                                                                                                         \
            EXPECT_EQ(v0[1], 3);                                                                                                         \
            EXPECT_EQ(v0[2], 2);                                                                                                         \
            EXPECT_EQ(v0[3], 2);                                                                                                         \
        }                                                                                                                                \
        {                                                                                                                                \
            Vector<int> v1 { 1, 2, 3, 4, 5 };                                                                                            \
            Array indices { 0, 1, 2, 3, 4 };                                                                                             \
            v1.remove_all(indices);                                                                                                      \
            EXPECT_EQ(v1.size(), 0u);                                                                                                    \
        }                                                                                                                                \
        {                                                                                                                                \
            Vector<int> v2 { 1, 2, 3, 4, 5 };                                                                                            \
            Array<u32, 0> indices;                                                                                                       \
            v2.remove_all(indices);                                                                                                      \
            EXPECT_EQ(v2.size(), 5u);                                                                                                    \
            EXPECT_EQ(v2[0], 1);                                                                                                         \
            EXPECT_EQ(v2[1], 2);                                                                                                         \
            EXPECT_EQ(v2[2], 3);                                                                                                         \
            EXPECT_EQ(v2[3], 4);                                                                                                         \
            EXPECT_EQ(v2[4], 5);                                                                                                         \
        }                                                                                                                                \
        {                                                                                                                                \
            Vector<int> v3;                                                                                                              \
            Array<u32, 0> indices;                                                                                                       \
            v3.remove_all(indices);                                                                                                      \
            EXPECT_EQ(v3.size(), 0u);                                                                                                    \
        }                                                                                                                                \
        /* One more test with a nonstandard iterator deref function */                                                                   \
        {                                                                                                                                \
            Vector<int> v4 { 1, 2, 3, 2, 4, 2, 5 };                                                                                      \
            struct IndexWrapper {                                                                                                        \
                size_t index;                                                                                                            \
                size_t const& operator*() const { return index; }                                                                        \
            };                                                                                                                           \
            Array<IndexWrapper, 3> indices { IndexWrapper { 1 }, IndexWrapper { 4 }, IndexWrapper { 6 } };                               \
            v4.remove_all(indices, [](auto const& it) -> size_t { return **it; });                                                       \
            EXPECT_EQ(v4.size(), 4u);                                                                                                    \
            EXPECT_EQ(v4[0], 1);                                                                                                         \
            EXPECT_EQ(v4[1], 3);                                                                                                         \
            EXPECT_EQ(v4[2], 2);                                                                                                         \
            EXPECT_EQ(v4[3], 2);                                                                                                         \
        }                                                                                                                                \
    }

DECLARE_TESTS_FOR_VEC(Vector)

template<typename T, size_t N = 0>
using VectorWithFastLastAccess = Vector<T, N, FastLastAccess::Yes>;
DECLARE_TESTS_FOR_VEC(VectorWithFastLastAccess)

TEST_CASE(VectorWithFastLastAccess_unsafe)
{
    VectorWithFastLastAccess<int> v;
    v.append(1);
    v.append(2);

    EXPECT_EQ(v.unsafe_last(), 2);
    EXPECT_EQ(v.unsafe_take_last(), 2);
    EXPECT_EQ(v.unsafe_last(), 1);
}
