text: /* Copyright 2017 Mozilla Foundation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import { AbortException } from "../../src/shared/util.js";
  import { PDFNetworkStream } from "../../src/display/network.js";
  
  describe("network", function() {
    var pdf1 = new URL("../pdfs/tracemonkey.pdf", window.location).href;
    var pdf1Length = 1016315;
  
    it("read without stream and range", function(done) {
      var stream = new PDFNetworkStream({
        url: pdf1,
        rangeChunkSize: 65536,
        disableStream: true,
        disableRange: true,
      });
  
      var fullReader = stream.getFullReader();
  
      var isStreamingSupported, isRangeSupported;
      var promise = fullReader.headersReady.then(function() {
        isStreamingSupported = fullReader.isStreamingSupported;
        isRangeSupported = fullReader.isRangeSupported;
      });
  
      var len = 0,
        count = 0;
      var read = function() {
        return fullReader.read().then(function(result) {
          if (result.done) {
            return undefined;
          }
          count++;
          len += result.value.byteLength;
          return read();
        });
      };
  
      var readPromise = Promise.all([read(), promise]);
  
      readPromise
        .then(function(page) {
          expect(len).toEqual(pdf1Length);
          expect(count).toEqual(1);
          expect(isStreamingSupported).toEqual(false);
          expect(isRangeSupported).toEqual(false);
          done();
        })
        .catch(function(reason) {
          done.fail(reason);
        });
    });
  
    it("read custom ranges", function(done) {
      // We don't test on browsers that don't support range request, so
      // requiring this test to pass.
      var rangeSize = 32768;
      var stream = new PDFNetworkStream({
        url: pdf1,
        length: pdf1Length,
        rangeChunkSize: rangeSize,
        disableStream: true,
        disableRange: false,
      });
  
      var fullReader = stream.getFullReader();
  
      var isStreamingSupported, isRangeSupported, fullReaderCancelled;
      var promise = fullReader.headersReady.then(function() {
        isStreamingSupported = fullReader.isStreamingSupported;
        isRangeSupported = fullReader.isRangeSupported;
        // we shall be able to close the full reader without issues
        fullReader.cancel(new AbortException("Don't need fullReader."));
        fullReaderCancelled = true;
      });
  
      // Skipping fullReader results, requesting something from the PDF end.
      var tailSize = pdf1Length % rangeSize || rangeSize;
  
      var range1Reader = stream.getRangeReader(
        pdf1Length - tailSize - rangeSize,
        pdf1Length - tailSize
      );
      var range2Reader = stream.getRangeReader(pdf1Length - tailSize, pdf1Length);
  
      var result1 = { value: 0 },
        result2 = { value: 0 };
      var read = function(reader, lenResult) {
        return reader.read().then(function(result) {
          if (result.done) {
            return undefined;
          }
          lenResult.value += result.value.byteLength;
          return read(reader, lenResult);
        });
      };
  
      var readPromises = Promise.all([
        read(range1Reader, result1),
        read(range2Reader, result2),
        promise,
      ]);
  
      readPromises
        .then(function() {
          expect(result1.value).toEqual(rangeSize);
          expect(result2.value).toEqual(tailSize);
          expect(isStreamingSupported).toEqual(false);
          expect(isRangeSupported).toEqual(true);
          expect(fullReaderCancelled).toEqual(true);
          done();
        })
        .catch(function(reason) {
          done.fail(reason);
        });
    });
  });
  