mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-24 17:35:10 +03:00
Aaron Vaage
74b97ed428
Added a filter method for iterables so that we can filter any type of collection without first needing to convert it over to an array. Change-Id: I28919e271672649d13d3b6c2e6902d0ff549a2ee
88 lines
2.4 KiB
JavaScript
88 lines
2.4 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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describe('Iterables', function() {
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const Iterables = shaka.util.Iterables;
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describe('map', function() {
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const map = Iterables.map;
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it('works with no items', function() {
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const input = new Set([]);
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const output = Array.from(map(input, (x) => -x));
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expect(output).toEqual([]);
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});
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it('works with items', function() {
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const input = new Set([1, 2, 3]);
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const output = Array.from(map(input, (x) => -x));
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expect(output).toEqual([-1, -2, -3]);
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});
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});
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describe('every', function() {
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const every = Iterables.every;
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it('works with no items', function() {
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const input = new Set([]);
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expect(every(input, (x) => x >= 0)).toBeTruthy();
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});
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it('works with items', function() {
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const input = new Set([0, 1, 2, 3]);
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expect(every(input, (x) => x >= 0)).toBeTruthy();
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expect(every(input, (x) => x > 0)).toBeFalsy();
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});
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});
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describe('some', function() {
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const some = Iterables.some;
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it('works with no items', function() {
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const input = new Set([]);
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expect(some(input, (x) => x >= 2)).toBeFalsy();
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});
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it('works with items', function() {
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const input = new Set([0, 1, 2, 3]);
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expect(some(input, (x) => x > 2)).toBeTruthy();
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expect(some(input, (x) => x < 0)).toBeFalsy();
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});
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});
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describe('filter', function() {
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const filter = Iterables.filter;
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it('works with no items', function() {
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const input = new Set([]);
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expect(filter(input, (x) => x >= 2)).toEqual([]);
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});
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it('works with items', function() {
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const input = new Set([0, 1, 2, 3]);
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// Everything
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expect(filter(input, (x) => x < 7)).toEqual([0, 1, 2, 3]);
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// Some things
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expect(filter(input, (x) => x < 2)).toEqual([0, 1]);
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// Nothing
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expect(filter(input, (x) => x < 0)).toEqual([]);
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});
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});
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});
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