@Test
public void testMPUDoesMultipart() throws IOException, InterruptedException {
MockWebServer server = new MockWebServer();
server.enqueue(new MockResponse().setResponseCode(200).setBody("<UploadId>upload-id</UploadId>"));
server.enqueue(new MockResponse().setResponseCode(200).addHeader("ETag", "a00"));
server.enqueue(new MockResponse().setResponseCode(200).addHeader("ETag", "b00"));
server.enqueue(new MockResponse().setResponseCode(200).setBody("<ETag>fff</ETag>"));
server.play();
byte[] bytes = "0123456789abcdef".getBytes(Charsets.US_ASCII);
int partSize = bytes.length / 2;