dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-starter-web'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

gradlew test

assertThat(actual,is(not(equal(matcher)))

testCompile group: 'com.shazam', name: 'shazamcrest', version: '0.11'

assertThat(
  actualPerson,
  sameBeanAs(expectedPerson)
  	.with("address.streetName", startsWith("Via"));

testCompile group: 'org.mockito', name: 'mockito-all', version: '1.10.19'

when(user.getName()).thenReturn("John");

doReturn(true).when(user).getName());

ArgumentCaptor<SomeData> captor;
captor = ArgumentCaptor.forClass(SomeData.class);
verify(other, times(1))
		.doSomething(captor.capture());

// Assert the argument
SomeData actual = captor.getValue();
assertEquals("Some inner data", actual.innerData);

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {TestDrivenApplication.class})
@WebAppConfiguration
public class ProductDiscountControllerTest {

    @Autowired
    WebApplicationContext wac; 
    MockMvc mockMvc;
    
    @Before
    public void setup() {
        this.mockMvc = MockMvcBuilders.
        				webAppContextSetup(this.wac)
                        .dispatchOptions(true).build();
    }

    @Test
    public void getDiscount() throws Exception {
        mockMvc.perform( MockMvcRequestBuilders
                .get("/api/discount/1?clientId=2")
                .accept(MediaType.ALL))
                .andDo(print())
                .andExpect(MockMvcResultMatchers.status().isOk());
    }