// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/src/diagnostic/diagnostic.dart' as diag;
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../dart/resolution/context_collection_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(EqualElementsInConstSetTest);
  });
}

@reflectiveTest
class EqualElementsInConstSetTest extends PubPackageResolutionTest
    with EqualElementsInConstSetTestCases {}

mixin EqualElementsInConstSetTestCases on PubPackageResolutionTest {
  test_const_entry() async {
    await assertErrorsInCode(
      '''
var c = const {1, 2, 1};
''',
      [
        error(
          diag.equalElementsInConstSet,
          21,
          1,
          contextMessages: [message(testFile, 15, 1)],
        ),
      ],
    );
  }

  test_const_entry_extensionType_typeValue() async {
    await assertErrorsInCode(
      '''
const x = {int, E};
extension type E(int it) {}
''',
      [
        error(
          diag.equalElementsInConstSet,
          16,
          1,
          contextMessages: [message(testFile, 11, 3)],
        ),
      ],
    );
  }

  test_const_ifElement_thenElseFalse() async {
    await assertErrorsInCode(
      '''
var c = const {1, if (1 < 0) 2 else 1};
''',
      [
        error(
          diag.equalElementsInConstSet,
          36,
          1,
          contextMessages: [message(testFile, 15, 1)],
        ),
      ],
    );
  }

  test_const_ifElement_thenElseFalse_onlyElse() async {
    await assertNoErrorsInCode('''
var c = const {if (0 < 1) 1 else 1};
''');
  }

  test_const_ifElement_thenElseTrue() async {
    await assertNoErrorsInCode('''
var c = const {1, if (0 < 1) 2 else 1};
''');
  }

  test_const_ifElement_thenElseTrue_onlyThen() async {
    await assertNoErrorsInCode('''
var c = const {if (0 < 1) 1 else 1};
''');
  }

  test_const_ifElement_thenFalse() async {
    await assertNoErrorsInCode('''
var c = const {2, if (1 < 0) 2};
''');
  }

  test_const_ifElement_thenTrue() async {
    await assertErrorsInCode(
      '''
var c = const {1, if (0 < 1) 1};
''',
      [
        error(
          diag.equalElementsInConstSet,
          29,
          1,
          contextMessages: [message(testFile, 15, 1)],
        ),
      ],
    );
  }

  test_const_instanceCreation_equalTypeArgs() async {
    await assertErrorsInCode(
      r'''
class A<T> {
  const A();
}

var c = const {const A<int>(), const A<int>()};
''',
      [
        error(
          diag.equalElementsInConstSet,
          60,
          14,
          contextMessages: [message(testFile, 44, 14)],
        ),
      ],
    );
  }

  test_const_instanceCreation_notEqualTypeArgs() async {
    // No error because A<int> and A<num> are different types.
    await assertNoErrorsInCode(r'''
class A<T> {
  const A();
}

var c = const {const A<int>(), const A<num>()};
''');
  }

  test_const_list_hasEqual() async {
    await assertErrorsInCode(
      r'''
const x = {[0], [0]};
''',
      [
        error(
          diag.equalElementsInConstSet,
          16,
          3,
          contextMessages: [message(testFile, 11, 3)],
        ),
      ],
    );
  }

  test_const_list_noEqual() async {
    await assertNoErrorsInCode(r'''
const x = {[0], [1]};
''');
  }

  test_const_record_hasEqual() async {
    await assertErrorsInCode(
      r'''
const x = {(0, 1), (0, 1)};
''',
      [
        error(
          diag.equalElementsInConstSet,
          19,
          6,
          contextMessages: [message(testFile, 11, 6)],
        ),
      ],
    );
  }

  test_const_record_noEqual() async {
    await assertNoErrorsInCode(r'''
const x = {(0, 1), (0, 2)};
''');
  }

  test_const_spread__noDuplicate() async {
    await assertNoErrorsInCode('''
var c = const {1, ...{2}};
''');
  }

  test_const_spread_hasDuplicate() async {
    await assertErrorsInCode(
      '''
var c = const {1, ...{1}};
''',
      [
        error(
          diag.equalElementsInConstSet,
          21,
          3,
          contextMessages: [message(testFile, 15, 1)],
        ),
      ],
    );
  }

  test_nonConst_entry() async {
    // No error, but there is a hint.
    await assertErrorsInCode(
      '''
var c = {1, 2, 1};
''',
      [error(diag.equalElementsInSet, 15, 1)],
    );
  }
}
