testSend_streamBinaryChunks() {
    fetchMock(new Request('https://www.google.com', {
      headers: new Headers(),
      method: 'POST',
    })).$returns(Promise.resolve(createSuccessStreamingResponse()));

    mockControl.$replayAll();

    factory =
        new FetchXmlHttpFactory({worker: worker, streamBinaryChunks: true});
    return verifySend(
        'POST', 200 /* expectedStatusCode */, true /* isStream */,
        false /* isArrayBuffer */, true /* isStreamBinaryCrunks */);
  }
Tests that streaming binary responses are properly handled.
@return {!Promise<void>}