MockServer with test specific session id - spring-boot

Question

I use SpringBoot and Java to write e2e tests for my API.
Along the flow, I am doing an HTTP call to a storage API (S3), and I am mocking it using MockServer.
This is the HttpClient and how I am creating my post request:
public class HttpClient {
private final String baseUrl;
public <T> Mono<T> post(final String path, String body, Class<T> responseType) {
return WebClient.builder()
.baseUrl(baseUrl) // localhost:1082
.build()
.post()
.uri(path)
.bodyValue(body)
.accept(MediaType.APPLICATION_JSON)
...
This is how I am configuring my mock server:
public class CommonMockServerHelpers {
private static MockServerClient mockServerClientStorage = new MockServerClient("localhost", 1082).reset();
public static MockServerClient getClientStorage() {
return mockServerClientStorage;
}
public static void verify(String path, String exceptedRequestBody, int times) {
Awaitility.await()
.atMost(Duration.ofSeconds(60))
.untilAsserted(() ->
verify(getClientStorage(), path, exceptedRequestBody, times)
);
}
public static void verify(MockServerClient client, String path, String exceptedRequestBody, int times) {
client.verify(buildPostRequest()
.withBody(subString(exceptedRequestBody))
.withPath(path), VerificationTimes.exactly(times));
}
In my tests, I am making API HTTP calls using RestTemplate. In one test this verification should pass:
CommonMockServerHelpers.verify("/save-file", "FAILED", 0);
while on the other it should not.
When running the test they collide and make each other fail.
Is there a way to create some uniqueness to each test so I'll be able to verify the MockServer calls of a test without interfering with the other tests?

Answer 1

you should write expectations in each test case like this:
mockServerClientStorage.reset()
.when(request()
.withMethod("GET")
.withPath("/save-file"))
.respond(response()
.withStatusCode(200)
.withBody("Nice!"));
mockServerClientStorage.reset()
.when(request()
.withMethod("GET")
.withPath("/save-file"))
.respond(response()
.withStatusCode(500)
.withBody("I failed!"));
It's important to do the reset() first, because those expectation are saved by the mockServer and will result in flaky tests otherwise. You could do the reset() in a #beforeEach-method if you like.