@Test
public void modifyRequestHeaders() {
OperationRequest request =
this.requestFactory.create(
URI.create("http://localhost"),
HttpMethod.GET,
new byte[0],
getHttpHeaders(),
new Parameters(),
Collections.<OperationRequestPart>emptyList());
OperationRequest preprocessed = this.preprocessor.preprocess(request);
assertThat(preprocessed.getHeaders().size(), is(equalTo(2)));
assertThat(preprocessed.getHeaders(), hasEntry("a", Arrays.asList("alpha")));
assertThat(preprocessed.getHeaders(), hasEntry("Host", Arrays.asList("localhost")));
}