128 lines
3.6 KiB
JavaScript
128 lines
3.6 KiB
JavaScript
'use strict';
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var defineProperties = require('define-properties');
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var test = require('tape');
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var callBind = require('call-bind');
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var functionsHaveNames = require('functions-have-names')();
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var forEach = require('for-each');
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var debug = require('object-inspect');
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var v = require('es-value-fixtures');
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var hasSymbols = require('has-symbols/shams')();
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var mockProperty = require('mock-property');
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var index = require('../Iterator.zip');
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var impl = require('../Iterator.zip/implementation');
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var from = require('../Iterator.from/polyfill')();
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var isEnumerable = Object.prototype.propertyIsEnumerable;
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var testIterator = require('./helpers/testIterator');
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module.exports = {
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tests: function (zip, name, t) {
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t['throws'](
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function () { return new zip(); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` itself is not a constructor'
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);
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t['throws'](
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function () { return new zip({}); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` itself is not a constructor, with an argument'
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);
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forEach(v.primitives.concat(v.objects), function (nonIterator) {
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t['throws'](
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function () { zip(nonIterator, []); },
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TypeError,
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debug(nonIterator) + ' is not an iterable Object'
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);
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});
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t.test('actual iteration', { skip: !hasSymbols }, function (st) {
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forEach(v.nonFunctions, function (nonFunction) {
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if (nonFunction != null) {
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var badIterable = {};
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badIterable[Symbol.iterator] = nonFunction;
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st['throws'](
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function () { zip([[], badIterable, []]).next(); },
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TypeError,
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debug(badIterable) + ' is not a function'
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);
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}
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});
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forEach(v.strings, function (string) {
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st['throws'](
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function () { zip([string]); },
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TypeError,
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'non-objects are not considered iterable'
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);
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});
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var arrayIt = zip([[1, 2, 3]]);
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st.equal(typeof arrayIt.next, 'function', 'has a `next` function');
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st.test('real iterators', { skip: !hasSymbols }, function (s2t) {
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var iter = [1, 2][Symbol.iterator]();
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testIterator(zip([iter, [3, 4]]), [[1, 3], [2, 4]], s2t, 'array iterator + array yields combined results');
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s2t.end();
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});
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st.test('observability in a replaced String iterator', function (s2t) {
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var originalStringIterator = String.prototype[Symbol.iterator];
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var observedType;
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s2t.teardown(mockProperty(String.prototype, Symbol.iterator, {
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get: function () {
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'use strict'; // eslint-disable-line strict, lines-around-directive
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observedType = typeof this;
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return originalStringIterator;
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}
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}));
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zip([from('')]);
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s2t.equal(observedType, 'string', 'string primitive -> primitive receiver in Symbol.iterator getter');
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zip([from(Object(''))]);
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s2t.equal(observedType, 'object', 'boxed string -> boxed string in Symbol.iterator getter');
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s2t.end();
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});
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st.end();
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});
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},
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index: function () {
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test('Iterator.zip: index', function (t) {
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module.exports.tests(index, 'Iterator.zip', t);
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t.end();
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});
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},
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implementation: function () {
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test('Iterator.zip: implementation', function (t) {
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module.exports.tests(impl, 'Iterator.zip', t);
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t.end();
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});
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},
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shimmed: function () {
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test('Iterator.zip: shimmed', function (t) {
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t.test('Function name', { skip: !functionsHaveNames }, function (st) {
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st.equal(Iterator.zip.name, 'zip', 'Iterator.zip has name "zip"');
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st.end();
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});
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t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
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et.equal(false, isEnumerable.call(Iterator, 'zip'), 'Iterator.zip is not enumerable');
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et.end();
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});
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module.exports.tests(callBind(Iterator.zip, Iterator), 'Iterator.zip', t);
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t.end();
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});
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}
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};
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