'use strict';

var define = require('../'); var test = require('tape'); var keys = require('object-keys');

var arePropertyDescriptorsSupported = function () {

var obj = { a: 1 };
try {
        Object.defineProperty(obj, 'x', { value: obj });
        return obj.x === obj;
} catch (e) { /* this is IE 8. */
        return false;
}

}; var descriptorsSupported = !!Object.defineProperty && arePropertyDescriptorsSupported();

var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';

test('defineProperties', function (dt) {

dt.test('with descriptor support', { skip: !descriptorsSupported }, function (t) {
        var getDescriptor = function (value) {
                return {
                        configurable: true,
                        enumerable: false,
                        value: value,
                        writable: true
                };
        };

        var obj = {
                a: 1,
                b: 2,
                c: 3
        };
        t.deepEqual(keys(obj), ['a', 'b', 'c'], 'all literal-set keys start enumerable');
        define(obj, {
                b: 3,
                c: 4,
                d: 5
        });
        t.deepEqual(obj, {
                a: 1,
                b: 2,
                c: 3
        }, 'existing properties were not overridden');
        t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'new property "d" was added and is not enumerable');
        t.deepEqual(['a', 'b', 'c'], keys(obj), 'new keys are not enumerable');

        define(obj, {
                a: 2,
                b: 3,
                c: 4
        }, {
                a: function () { return true; },
                b: function () { return false; }
        });
        t.deepEqual(obj, {
                b: 2,
                c: 3
        }, 'properties only overriden when predicate exists and returns true');
        t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'existing property "d" remained and is not enumerable');
        t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'a'), getDescriptor(2), 'existing property "a" was overridden and is not enumerable');
        t.deepEqual(['b', 'c'], keys(obj), 'overridden keys are not enumerable');

        t.end();
});

dt.test('without descriptor support', { skip: descriptorsSupported }, function (t) {
        var obj = {
                a: 1,
                b: 2,
                c: 3
        };
        define(obj, {
                b: 3,
                c: 4,
                d: 5
        });
        t.deepEqual(obj, {
                a: 1,
                b: 2,
                c: 3,
                d: 5
        }, 'existing properties were not overridden, new properties were added');

        define(obj, {
                a: 2,
                b: 3,
                c: 4
        }, {
                a: function () { return true; },
                b: function () { return false; }
        });
        t.deepEqual(obj, {
                a: 2,
                b: 2,
                c: 3,
                d: 5
        }, 'properties only overriden when predicate exists and returns true');

        t.end();
});

dt.end();

});

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

var sym = Symbol('foo');
var obj = {};
var aValue = {};
var bValue = {};
var properties = { a: aValue };
properties[sym] = bValue;

define(obj, properties);

t.deepEqual(Object.keys(obj), [], 'object has no enumerable keys');
t.deepEqual(Object.getOwnPropertyNames(obj), ['a'], 'object has non-enumerable "a" key');
t.deepEqual(Object.getOwnPropertySymbols(obj), [sym], 'object has non-enumerable symbol key');
t.equal(obj.a, aValue, 'string keyed value is defined');
t.equal(obj[sym], bValue, 'symbol keyed value is defined');

t.end();

});