private static Response.Builder fakeResponse(
      int statusCode, String httpMessage, String jsonBody) {
    Response.Builder builder = fakeResponse(statusCode, httpMessage);
    builder.body(ResponseBody.create(MediaType.parse("application/json"), jsonBody));
    return builder;
  }
This tests the MicrosoftMediaImporter. As of now, it only tests the number of requests called.
More tests are needed to test request bodies and parameters.
extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/media/MicrosoftMediaImporterTest.java