@Test public void getAll_two() {

  injector.inject(context, request);
  request.put("x-amzn-trace-id", awsTraceId);
  request.put("x-vcap-request-id", uuid);
  context = extractor.extract(request).context();
  assertThat(ExtraFieldPropagation.getAll(context))
    .hasSize(2)
    .containsEntry("x-amzn-trace-id", awsTraceId)
    .containsEntry("x-vcap-request-id", uuid);
}