334 lines
8.4 KiB
Plaintext
334 lines
8.4 KiB
Plaintext
'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 hasStrictMode = require('has-strict-mode')();
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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 hasPropertyDescriptors = require('has-property-descriptors')();
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var index = require('../Iterator.prototype.filter');
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var impl = require('../Iterator.prototype.filter/implementation');
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var fnName = 'filter';
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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 (filter, name, t) {
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t['throws'](
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function () { return new filter(); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` is not a constructor'
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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 () { filter(nonIterator); },
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TypeError,
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debug(nonIterator) + ' is not an Object with a callable `next` method'
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);
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var badNext = { next: nonIterator };
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t['throws'](
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function () { filter(badNext); },
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TypeError,
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debug(badNext) + ' is not an Object with a callable `next` method'
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);
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});
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forEach(v.nonFunctions, function (nonFunction) {
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t['throws'](
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function () { filter({ next: function () {} }, nonFunction); },
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TypeError,
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debug(nonFunction) + ' is not a function'
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);
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});
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t.test('observable lookups', { skip: !hasPropertyDescriptors }, function (st) {
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var effects = [];
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var obj = {};
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Object.defineProperty(obj, 'next', {
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configurable: true,
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enumerable: true,
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get: function next() {
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effects.push('get next');
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return function () {
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return { done: true, value: undefined };
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};
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}
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});
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st['throws'](
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function () { filter(obj, null); },
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TypeError
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);
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st.deepEqual(effects, []);
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st.end();
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});
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t.test('actual iteration', { skip: !hasSymbols }, function (st) {
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var arr = [1, 2, 3];
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var iterator = callBind(arr[Symbol.iterator], arr);
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st['throws'](
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function () { return new filter(iterator()); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` iterator is not a constructor'
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);
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st['throws'](
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function () { return new filter(iterator(), function () {}); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` iterator is not a constructor'
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);
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testIterator(iterator(), [1, 2, 3], st, 'original');
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testIterator(filter(iterator(), function () { return false; }), [], st, 'filter for always-false');
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testIterator(filter(iterator(), function () { return true; }), [1, 2, 3], st, 'filter for always-true');
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testIterator(filter(iterator(), function (x, i) { return x === 2 && i === 1; }), [2], st, 'filter returns value for matching value/index');
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/filter/predicate-args', function (st) {
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var g = function g() {
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var arr = ['a', 'b', 'c'];
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var i = 0;
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return {
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next: function () {
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try {
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return {
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value: arr[i],
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done: i >= arr.length
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};
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} finally {
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i += 1;
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}
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}
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};
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};
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var assertionCount = 0;
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var iter = filter(
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g(),
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function (value, count) {
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if (value === 'a') {
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st.equal(count, 0, 'first iteration');
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} else if (value === 'b') {
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st.equal(count, 1, 'second iteration');
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} else if (value === 'c') {
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st.equal(count, 2, 'third iteration');
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} else {
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st.fail('unexpected iteration');
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}
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assertionCount += 1;
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return true;
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}
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);
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st.equal(assertionCount, 0, 'prior to iteration');
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testIterator(iter, ['a', 'b', 'c'], st, 'iteration');
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st.equal(assertionCount, 3);
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/filter/predicate-throws', function (st) {
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var returnCalls = 0;
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var iter = {
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next: function () {
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return {
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done: false,
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value: 1
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};
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},
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'return': function () {
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returnCalls += 1;
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return {};
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}
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};
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var callbackCalls = 0;
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var iterator = filter(iter, function () {
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callbackCalls += 1;
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throw new SyntaxError();
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});
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st['throws'](function () { iterator.next(); }, SyntaxError, 'next() throws');
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st.equal(callbackCalls, 1);
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st.equal(returnCalls, 1);
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/filter/predicate-throws-then-closing-iterator-also-throws', function (st) {
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var iter = {
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next: function next() {
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return {
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done: false,
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value: 1
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};
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},
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'return': function () {
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throw new EvalError();
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}
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};
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var iterator = filter(iter, function () {
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throw new SyntaxError();
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});
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st['throws'](
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function () { iterator.next(); },
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SyntaxError,
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'when the predicate and return() both throw, the predicate’s exception wins'
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);
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/filter/get-return-method-throws', { skip: !hasPropertyDescriptors }, function (st) {
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var badIterator = {
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next: function next() {
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return {
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done: false,
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value: 1
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};
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}
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};
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Object.defineProperty(badIterator, 'return', { get: function () { throw new SyntaxError(); } });
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var iter = filter(badIterator, function () { return true; });
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iter.next();
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st['throws'](
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function () { iter['return'](); },
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SyntaxError,
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'gets the `return` method, whose getter throws'
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);
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/drop/return-is-forwarded', function (st) {
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var returnCount = 0;
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var badIterator = {
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next: function next() {
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return {
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done: false,
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value: 1
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};
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},
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'return': function () {
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returnCount += 1;
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return {};
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}
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};
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var iter1 = filter(badIterator, function () { return false; });
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st.equal(returnCount, 0, 'iter1, before return()');
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iter1['return']();
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st.equal(returnCount, 1, 'iter1, after return()');
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st.end();
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});
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t.test('262: test/built-ins/Iterator/prototype/drop/return-is-not-forwarded-after-exhaustion', { skip: !hasPropertyDescriptors }, function (st) {
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var makeBadIterator = function makeBadIterator() {
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return {
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next: function next() {
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return {
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done: true,
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value: undefined
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};
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},
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'return': function () {
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throw new SyntaxError();
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}
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};
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};
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var iter1 = filter(makeBadIterator(), function () { return true; });
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st['throws'](
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function () { iter1['return'](); },
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SyntaxError,
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'iter1, return() throws'
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);
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iter1.next();
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iter1['return']();
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// 3 filters (i wish i had pipeline)
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var iter2 = filter(
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filter(
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filter(
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makeBadIterator(),
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function () { return true; }
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),
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function () { return true; }
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),
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function () { return true; }
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);
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st['throws'](
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function () { iter2['return'](); },
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SyntaxError,
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'iter2, return() throws'
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);
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iter2.next();
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iter2['return']();
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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.prototype.' + fnName + ': index', function (t) {
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module.exports.tests(index, 'Iterator.prototype.' + fnName, 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.prototype.' + fnName + ': implementation', function (t) {
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module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, 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.prototype.' + fnName + ': shimmed', function (t) {
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t.test('Function name', { skip: !functionsHaveNames }, function (st) {
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st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
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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.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
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et.end();
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});
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t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
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st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
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st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
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st.end();
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});
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module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
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t.end();
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});
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}
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};
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