@Test
public void fetchNewRequestToken_OAuth10() {
MockRestServiceServer mockServer = MockRestServiceServer.createServer(oauth10.getRestTemplate());
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
mockServer.expect(requestTo(REQUEST_TOKEN_URL))
.andExpect(method(POST))
.andExpect(headerContains("Authorization", "oauth_version=\"1.0\""))
.andExpect(headerContains("Authorization", "oauth_signature_method=\"HMAC-SHA1\""))
.andExpect(headerContains("Authorization", "oauth_consumer_key=\"consumer_key\""))
.andExpect(headerContains("Authorization", "oauth_nonce=\""))