173fbef05b
This rule is already enabled in mozilla-central, and helps ensure more consistent functions/methods, see https://searchfox.org/mozilla-central/rev/b9da45f63cb567244933c77b2c7e827a057d3f9b/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js#119-120 Please see https://eslint.org/docs/rules/consistent-return for additional information.
109 lines
3.6 KiB
JavaScript
109 lines
3.6 KiB
JavaScript
/* Copyright 2019 Mozilla Foundation
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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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/* eslint no-var: error */
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import { PDFFetchStream } from '../../src/display/fetch_stream';
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describe('fetch_stream', function() {
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const pdfUrl = new URL('../pdfs/tracemonkey.pdf', window.location).href;
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const pdfLength = 1016315;
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it('read with streaming', function(done) {
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const stream = new PDFFetchStream({
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url: pdfUrl,
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disableStream: false,
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disableRange: true,
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});
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const fullReader = stream.getFullReader();
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let isStreamingSupported, isRangeSupported;
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const promise = fullReader.headersReady.then(function() {
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isStreamingSupported = fullReader.isStreamingSupported;
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isRangeSupported = fullReader.isRangeSupported;
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});
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let len = 0;
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const read = function() {
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return fullReader.read().then(function(result) {
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if (result.done) {
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return undefined;
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}
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len += result.value.byteLength;
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return read();
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});
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};
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const readPromise = Promise.all([read(), promise]);
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readPromise.then(function() {
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expect(len).toEqual(pdfLength);
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expect(isStreamingSupported).toEqual(true);
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expect(isRangeSupported).toEqual(false);
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done();
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}).catch(done.fail);
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});
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it('read ranges with streaming', function(done) {
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const rangeSize = 32768;
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const stream = new PDFFetchStream({
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url: pdfUrl,
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rangeChunkSize: rangeSize,
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disableStream: false,
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disableRange: false,
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});
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const fullReader = stream.getFullReader();
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let isStreamingSupported, isRangeSupported, fullReaderCancelled;
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const promise = fullReader.headersReady.then(function() {
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isStreamingSupported = fullReader.isStreamingSupported;
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isRangeSupported = fullReader.isRangeSupported;
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// We shall be able to close full reader without any issue.
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fullReader.cancel(new Error('Don\'t need full reader'));
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fullReaderCancelled = true;
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});
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const tailSize = (pdfLength % rangeSize) || rangeSize;
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const rangeReader1 = stream.getRangeReader(pdfLength - tailSize - rangeSize,
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pdfLength - tailSize);
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const rangeReader2 = stream.getRangeReader(pdfLength - tailSize, pdfLength);
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let result1 = { value: 0, }, result2 = { value: 0, };
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const read = function(reader, lenResult) {
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return reader.read().then(function(result) {
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if (result.done) {
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return undefined;
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}
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lenResult.value += result.value.byteLength;
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return read(reader, lenResult);
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});
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};
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const readPromise = Promise.all([read(rangeReader1, result1),
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read(rangeReader2, result2),
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promise]);
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readPromise.then(function() {
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expect(isStreamingSupported).toEqual(true);
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expect(isRangeSupported).toEqual(true);
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expect(fullReaderCancelled).toEqual(true);
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expect(result1.value).toEqual(rangeSize);
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expect(result2.value).toEqual(tailSize);
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done();
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}).catch(done.fail);
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});
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});
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