stanislaw-wein

public class UserServiceWireMockTest {

    private static WireMockServer wireMockServer;
    private static UserService userService;

    @BeforeAll
    static void setUp() {
        wireMockServer = new WireMockServer();
        wireMockServer.start();
        WireMock.configureFor("localhost", wireMockServer.port());

stanislaw-wein

<dependency>
    <groupId>com.github.tomakehurst</groupId>
    <artifactId>wiremock-jre8</artifactId>
    <version>2.32.0</version>
    <scope>test</scope>
</dependency>

stanislaw-wein

@ExtendWith(MockitoExtension.class)
class UserServiceMockitoTest {
  @Mock
  private WebClient webClient;
  @Mock
  private WebClient.RequestHeadersUriSpec requestHeadersUriSpec;
  @Mock
  private WebClient.RequestHeadersSpec requestHeadersSpec;
  @Mock
  private WebClient.ResponseSpec responseSpec;

stanislaw-wein

<dependency>
  <artifactId>mockito-core</artifactId>
  <groupId>org.mockito</groupId>
  <scope>test</scope>
  <version>5.2.0</version>
</dependency>
<dependency>
  <artifactId>mockito-junit-jupiter</artifactId>
  <groupId>org.mockito</groupId>
  <scope>test</scope>

stanislaw-wein

 // Test the asynchronous getUserById method
  @Test
  void whenGetUserByIdAsync_thenShouldReturnUser() throws JsonProcessingException {
    User expectedUser = new User(1, "Eric Cartman", "eric.cartman@email.com");
    mockWebServer.enqueue(new MockResponse().setBody(objectMapper.writeValueAsString(expectedUser))
        .addHeader("Content-Type", "application/json"));

    Mono<User> userMono = userService.getUserByIdAsync("1");

    StepVerifier.create(userMono).thenAwait().expectNextMatches(user -> user.equals(expectedUser))

stanislaw-wein

<dependency>
  <artifactId>mockwebserver</artifactId>
  <groupId>com.squareup.okhttp3</groupId>
  <scope>test</scope>
  <version>4.10.0</version>
</dependency>
<dependency>
  <artifactId>okhttp</artifactId>
  <groupId>com.squareup.okhttp3</groupId>
  <version>4.10.0</version>

stanislaw-wein

class UserServiceMockWebServerTest {

  private static MockWebServer mockWebServer;
  private static UserService userService;
  private static ObjectMapper objectMapper;

  // Set up the test environment by initializing the mock web server and user service
  @BeforeAll
  static void setUp() throws IOException {
    objectMapper = new ObjectMapper();

stanislaw-wein

GraphQL	REST
A query language for solving common problems when integrating APIs	An architectural style largely viewed as a conventional standard for designing APIs
Deployed over HTTP using a single endpoint that provides the full capabilities of the exposed service	Deployed over a set of URLs where each of them exposes a single resource
Uses a client-driven architecture	Uses a server-driven architecture
Lacks in-built caching mechanism

stanislaw-wein

GraphQL	REST
A query language for solving common problems when integrating APIs	An architectural style largely viewed as a conventional standard for designing APIs
Deployed over HTTP using a single endpoint that provides the full capabilities of the exposed service	Deployed over a set of URLs where each of them exposes a single resource
Uses a client-driven architecture	Uses a server-driven architecture
Lacks in-built caching mechanism

stanislaw-wein

public class CommentQueryResolver implements GraphQLQueryResolver {
    private ArticleRepository articleRepository;

    public Optional<List<Comment>> getArticleComments(final String articleId) {
        return articleRepository
                .findById(articleId)
                .map(Article::getComments);
    }
}