110 lines
3.4 KiB
JavaScript
110 lines
3.4 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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import { AbortException } from "../../src/shared/util.js";
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import { PDFFetchStream } from "../../src/display/fetch_stream.js";
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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", async function () {
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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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await Promise.all([read(), promise]);
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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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});
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it("read ranges with streaming", async function () {
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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 AbortException("Don't need fullReader."));
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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(
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pdfLength - tailSize - rangeSize,
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pdfLength - tailSize
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);
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const rangeReader2 = stream.getRangeReader(pdfLength - tailSize, pdfLength);
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const result1 = { value: 0 },
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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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await Promise.all([
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read(rangeReader1, result1),
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read(rangeReader2, result2),
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promise,
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]);
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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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});
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});
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