@reactivex/rxjs
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Reactive Extensions for modern JavaScript
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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/symbol/iterator-spec.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">"use strict";
var chai_1 = require('chai');
var iterator_1 = require('../../dist/cjs/symbol/iterator');
describe('iterator symbol', function () {
it('should exist', function () {
chai_1.expect(iterator_1.$$iterator).to.exist;
});
});
describe('symbolIteratorPonyfill', function () {
describe('when root.Symbol is a function', function () {
describe('and Symbol.iterator exists', function () {
it('should return Symbol.iterator', function () {
var FakeSymbol = function () { };
FakeSymbol.iterator = {};
var result = iterator_1.symbolIteratorPonyfill({ Symbol: FakeSymbol });
chai_1.expect(result).to.equal(FakeSymbol.iterator);
});
});
describe('and Symbol.iterator does not exist', function () {
it('should use Symbol to create an return a symbol and polyfill Symbol.iterator', function () {
var SYMBOL_RETURN = {};
var passedDescription;
var root = {
Symbol: function (description) {
passedDescription = description;
return SYMBOL_RETURN;
}
};
var result = iterator_1.symbolIteratorPonyfill(root);
chai_1.expect(result).to.equal(SYMBOL_RETURN);
chai_1.expect(root.Symbol.iterator).to.equal(SYMBOL_RETURN);
});
});
});
describe('when root.Symbol is NOT a function', function () {
describe('and root.Set exists with an @@iterator property that is a function (Mozilla bug)', function () {
it('should return "$$iterator"', function () {
var result = iterator_1.symbolIteratorPonyfill({
Set: function FakeSet() {
this['@@iterator'] = function () { };
}
});
chai_1.expect(result).to.equal('@@iterator');
});
});
describe('root.Set does not exit or does not have an @@iterator property', function () {
describe('but Map exists and a random key on Map.prototype that matches Map.prototype.entries (for es6-shim)', function () {
it('should return the key that matches the "entries" key on Map.prototype, but not return "size"', function () {
function FakeMap() { }
function fakeMethod() { }
FakeMap.prototype['-omg-lol-i-can-use-whatever-I-want-YOLO-'] = fakeMethod;
FakeMap.prototype.entries = fakeMethod;
FakeMap.prototype.size = fakeMethod;
var root = {
Map: FakeMap
};
var result = iterator_1.symbolIteratorPonyfill(root);
chai_1.expect(result).to.equal('-omg-lol-i-can-use-whatever-I-want-YOLO-');
});
});
describe('but Map exists and no other key except "size" on Map.prototype that matches Map.prototype.entries (for es6-shim)', function () {
it('should return "@@iterator"', function () {
function FakeMap() { }
function fakeMethod() { }
FakeMap.prototype.entries = fakeMethod;
FakeMap.prototype.size = fakeMethod;
var root = {
Map: FakeMap
};
var result = iterator_1.symbolIteratorPonyfill(root);
chai_1.expect(result).to.equal('@@iterator');
});
});
describe('if Set exists but has no iterator, and Map does not exist (bad polyfill maybe?)', function () {
it('should return "@@iterator"', function () {
var result = iterator_1.symbolIteratorPonyfill({
Set: function () { }
});
chai_1.expect(result).to.equal('@@iterator');
});
});
describe('and root.Set and root.Map do NOT exist', function () {
it('should return "@@iterator"', function () {
var result = iterator_1.symbolIteratorPonyfill({});
chai_1.expect(result).to.equal('@@iterator');
});
});
});
});
});
//# sourceMappingURL=iterator-spec.js.map</code></pre>
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