testSend_arrayBuffer() {
    fetchMock(new Request('https://www.google.com', {
      headers: new Headers(),
      method: 'POST',
    })).$returns(Promise.resolve(createArrayBufferResponse()));
    mockControl.$replayAll();
    return verifySend(
        'POST', 200 /* expectedStatusCode */, false /* isStream */,
        true /* isArrayBuffer */);
  }
Verifies the send method in case of getting an ArrayBuffer response.
@return {!Promise<void>}