'use strict';

var test = require('tape'); var isSymbol = require('../index');

var forEach = function (arr, func) {

var i;
for (i = 0; i < arr.length; ++i) {
        func(arr[i], i, arr);
}

};

var hasSymbols = require('has-symbols')(); var inspect = require('object-inspect'); var debug = function (v, m) { return inspect(v) + ' ' + m; };

test('non-symbol values', function (t) {

var nonSymbols = [
        true,
        false,
        Object(true),
        Object(false),
        null,
        undefined,
        {},
        [],
        /a/g,
        'string',
        42,
        new Date(),
        function () {},
        NaN
];
t.plan(nonSymbols.length);
forEach(nonSymbols, function (nonSymbol) {
        t.equal(false, isSymbol(nonSymbol), debug(nonSymbol, 'is not a symbol'));
});
t.end();

});

test('faked symbol values', function (t) {

t.test('real symbol valueOf', { skip: !hasSymbols }, function (st) {
        var fakeSymbol = { valueOf: function () { return Symbol('foo'); } };
        st.equal(false, isSymbol(fakeSymbol), 'object with valueOf returning a symbol is not a symbol');
        st.end();
});

t.test('faked @@toStringTag', { skip: !hasSymbols || !Symbol.toStringTag }, function (st) {
        var fakeSymbol = { valueOf: function () { return Symbol('foo'); } };
        fakeSymbol[Symbol.toStringTag] = 'Symbol';
        st.equal(false, isSymbol(fakeSymbol), 'object with fake Symbol @@toStringTag and valueOf returning a symbol is not a symbol');
        var notSoFakeSymbol = { valueOf: function () { return 42; } };
        notSoFakeSymbol[Symbol.toStringTag] = 'Symbol';
        st.equal(false, isSymbol(notSoFakeSymbol), 'object with fake Symbol @@toStringTag and valueOf not returning a symbol is not a symbol');
        st.end();
});

var fakeSymbolString = { toString: function () { return 'Symbol(foo)'; } };
t.equal(false, isSymbol(fakeSymbolString), 'object with toString returning Symbol(foo) is not a symbol');

t.end();

});

test('Symbol support', { skip: !hasSymbols }, function (t) {

t.test('well-known Symbols', function (st) {
        var isWellKnown = function filterer(name) {
                return name !== 'for' && name !== 'keyFor' && !(name in filterer);
        };
        var wellKnownSymbols = Object.getOwnPropertyNames(Symbol).filter(isWellKnown);
        wellKnownSymbols.forEach(function (name) {
                var sym = Symbol[name];
                st.equal(true, isSymbol(sym), debug(sym, ' is a symbol'));
        });
        st.end();
});

t.test('user-created symbols', function (st) {
        var symbols = [
                Symbol(),
                Symbol('foo'),
                Symbol['for']('foo'),
                Object(Symbol('object'))
        ];
        symbols.forEach(function (sym) {
                st.equal(true, isSymbol(sym), debug(sym, ' is a symbol'));
        });
        st.end();
});

t.end();

});