Suppose the application is dependent on a REST service on a external server, http://otherserver.com. For testing, I would like to simulate the external rest call (via Wiremock) within a JUnit environment. Starting a seperate server consumes time and is not easy. Working with WiremockRule looks the right direction. Creating simulation controllers is not an elegant way as Wiremock is available.
E.g. get( "http://otherserver.com/service3/");
PS: of course I know that I can simulate a REST call via Mockito.
Simulating localhost with Wiremock is easy. How can I use that code to simulate other servers and services? I copied parts from the popular Baeldung examples.
public class WireMockDemo {
@Rule
public WireMockRule wireMockRule = new WireMockRule();
@Test
public void wireMockTestJunitOtherServer() {
try {
// **this does not work...**
configureFor("otherserver.com", 8080);
stubFor(get(urlPathMatching("/service2/.*"))
.willReturn(aResponse()
.withStatus(200)
.withHeader("Content-Type", "application/json")
.withBody("\"testing-library\": \"WireMock\"")));
// Test via simple client
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet request = new HttpGet("http://otherserver:8080/service2/test");
HttpResponse httpResponse = httpClient.execute(request);
String stringResponse = convertHttpResponseToString(httpResponse);
System.out.println( "Response = " + stringResponse);
// Test via JUnit
verify(getRequestedFor(urlEqualTo("/service2/wiremock")));
assertEquals(200, httpResponse.getStatusLine().getStatusCode());
assertEquals("application/json", httpResponse.getFirstHeader("Content-Type").getValue());
assertEquals("\"testing-library\": \"WireMock\"", stringResponse);
} catch( Exception e) {
e.printStackTrace();
}
}
// Support methods
private String convertHttpResponseToString(HttpResponse httpResponse) throws IOException {
InputStream inputStream = httpResponse.getEntity().getContent();
return convertInputStreamToString(inputStream);
}
private String convertInputStreamToString(InputStream inputStream) {
Scanner scanner = new Scanner(inputStream, "UTF-8");
String string = scanner.useDelimiter("\\Z").next();
scanner.close();
return string;
}
}