add test to find by id with sucesses user service

user-service-api/gradle/wrapper/plugins/dependencies.gradle

@@ -36,6 +36,10 @@ dependencies {
 
     // Testing dependencies
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+    // Mockito for mocking in tests
+    testImplementation 'org.mockito:mockito-core:5.12.0'
+
 }
 
 dependencyManagement {

user-service-api/src/test/java/br/com/rayankonecny/userserviceapi/service/UserServiceTest.java

@@ -0,0 +1,54 @@
+package br.com.rayankonecny.userserviceapi.service;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.Optional;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import br.com.rayankonecny.userserviceapi.entity.User;
+import br.com.rayankonecny.userserviceapi.mapper.UserMapper;
+import br.com.rayankonecny.userserviceapi.repository.UserRepository;
+import models.responses.UserResponse;
+
+import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.times;
+
+@SpringBootTest
+public class UserServiceTest {
+
+  @InjectMocks
+  private UserService service;
+
+  @Mock
+  private UserRepository repository;
+
+  @Mock
+  private UserMapper mapper;
+
+  @Mock
+  private BCryptPasswordEncoder encoder;
+
+  @Test
+  public void whenCallFindByIdWithValidIdTheReturnUserResponse() {
+    when(repository.findById(anyString())).thenReturn(Optional.of(new User()));
+    when(mapper.fromEntity(any(User.class))).thenReturn(mock(UserResponse.class));
+
+    final var response = service.findById("1");
+
+    Assertions.assertNotNull(response);
+    assertEquals(UserResponse.class, response.getClass());
+
+    verify(repository, times(1)).findById(anyString());
+    verify(mapper, times(1)).fromEntity(any(User.class));
+  }
+}