mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-15 16:06:41 +03:00
Jacob Trimble
90 lines
3.2 KiB
JavaScript
90 lines
3.2 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('BufferUtils', () => {
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const BufferUtils = shaka.util.BufferUtils;
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describe('equal', () => {
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it('allows null', () => {
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const buffer = new Uint8Array([0]);
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expect(BufferUtils.equal(buffer, null)).toBe(false);
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expect(BufferUtils.equal(null, buffer)).toBe(false);
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expect(BufferUtils.equal(null, null)).toBe(true);
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});
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it('checks length', () => {
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const a = new Uint8Array([0]);
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const b = new Uint8Array([0, 1]);
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expect(BufferUtils.equal(a, b)).toBe(false);
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});
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it('compares values', () => {
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const a = new Uint8Array([0, 1]);
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const b = new Uint8Array([0, 1]);
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const c = new Uint8Array([0, 2]);
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expect(a).not.toBe(b);
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expect(a.buffer).not.toBe(b.buffer);
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expect(BufferUtils.equal(a, a)).toBe(true);
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expect(BufferUtils.equal(a, b)).toBe(true);
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expect(BufferUtils.equal(a, c)).toBe(false);
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});
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// TODO(modmaker): Fix comparisons of different types.
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xit('compares different types', () => {
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const a = new Uint8Array([0, 1, 2, 3]);
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const b = new DataView(new ArrayBuffer(4));
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b.setUint16(0, 0x0001, false);
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b.setUint16(2, 0x0203, false);
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expect(BufferUtils.equal(a, b)).toBe(true);
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});
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it('compares with same buffer', () => {
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const a = new Uint8Array([0, 1, 2, 3]);
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const b = new Uint16Array(a.buffer);
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expect(BufferUtils.equal(a, b)).toBe(true);
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});
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it('compares different views', () => {
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const top = new Uint8Array([0, 1, 2, 3, 0, 1, 2, 3]);
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const a = new Uint8Array(top.buffer, 0, 4);
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const b = new Uint8Array(top.buffer, 2, 4);
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const c = new Uint8Array(top.buffer, 4, 4);
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const d = new Uint16Array(top.buffer, 0, 2);
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const e = new DataView(top.buffer, 0, 4);
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expect(BufferUtils.equal(top, a)).toBe(false);
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expect(BufferUtils.equal(top, b)).toBe(false);
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expect(BufferUtils.equal(top, c)).toBe(false);
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expect(BufferUtils.equal(a, b)).toBe(false);
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expect(BufferUtils.equal(a, c)).toBe(true);
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expect(BufferUtils.equal(a, d)).toBe(true);
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expect(BufferUtils.equal(a, e)).toBe(true);
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expect(BufferUtils.equal(a, e)).toBe(true);
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});
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it('compares ArrayBuffers', () => {
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const a = new Uint8Array([0, 1, 2, 3]);
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const b = new Uint8Array([0, 1, 2, 3]);
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const c = new Uint8Array([0, 1, 2, 4]);
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const d = new Uint8Array([0, 1, 2]);
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expect(BufferUtils.equal(a.buffer, a.buffer)).toBe(true);
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expect(BufferUtils.equal(a.buffer, b.buffer)).toBe(true);
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expect(BufferUtils.equal(a.buffer, c.buffer)).toBe(false);
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expect(BufferUtils.equal(a.buffer, d.buffer)).toBe(false);
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});
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});
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});
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