java-tutorials/spring-mockito/src/test/java/com/baeldung/UserServiceIntegrationTest.java

package com.baeldung;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@ActiveProfiles("test")
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = MocksApplication.class)
public class UserServiceIntegrationTest {

    @Autowired
    private UserService userService;

    @Autowired
    private NameService nameService;

    @Test
    public void whenUserIdIsProvided_thenRetrievedNameIsCorrect() {
        Mockito.when(nameService.getUserName("SomeId")).thenReturn("Mock user name");

        String testName = userService.getUserName("SomeId");

        Assert.assertEquals("Mock user name", testName);
    }
}