How to use times_never_atLeast_atMost_verificationModes_should_work method of org.mockitousage.stubbing.StubbingWithThrowablesTest class

Best Mockito code snippet using org.mockitousage.stubbing.StubbingWithThrowablesTest.times_never_atLeast_atMost_verificationModes_should_work

times_never_atLeast_atMost_verificationModes_should_work

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1public void times_never_atLeast_atMost_verificationModes_should_work() {2 doThrow(new RuntimeException("1")).doThrow(new RuntimeException("2")).doThrow(new RuntimeException("3")).doThrow(new RuntimeException("4")).when(mock).simpleMethod();3 try {4 mock.simpleMethod();5 } catch (RuntimeException e) {6 }7 try {8 mock.simpleMethod();9 } catch (RuntimeException e) {10 }11 try {12 mock.simpleMethod();13 } catch (RuntimeException e) {14 }15 try {16 mock.simpleMethod();17 } catch (RuntimeException e) {18 }19 verify(mock, times(2)).simpleMethod();20 verify(mock, never()).booleanReturningMethod();21 verify(mock, atLeastOnce()).simpleMethod();22 verify(mock, atLeast(2)).simpleMethod();23 verify(mock, atMost(2)).simpleMethod();24}25public void times_never_atLeast_atMost_verificationModes_should_work() {26 doThrow(new RuntimeException("1")).doThrow(new RuntimeException("2")).doThrow(new RuntimeException("3")).doThrow(new RuntimeException("4")).when(mock).simpleMethod();27 try {28 mock.simpleMethod();29 } catch (RuntimeException e) {30 }31 try {32 mock.simpleMethod();33 } catch (RuntimeException e) {34 }35 try {36 mock.simpleMethod();37 } catch (RuntimeException e) {38 }39 try {40 mock.simpleMethod();41 } catch (RuntimeException e) {42 }43 verify(mock, times(2)).simpleMethod();44 verify(mock, never()).booleanReturningMethod();45 verify(mock, atLeastOnce()).simpleMethod();46 verify(mock, atLeast(2)).simpleMethod();47 verify(mock, atMost(2)).simpleMethod();48}49public void times_never_atLeast_atMost_verificationModes_should_work() {50 doThrow(new RuntimeException("1")).doThrow(new RuntimeException("2")).doThrow(new RuntimeException("3")).doThrow(new RuntimeException("4")).when(mock).simpleMethod();51 try {52 mock.simpleMethod();53 } catch (RuntimeException e) {54 }55 try {56 mock.simpleMethod();

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times_never_atLeast_atMost_verificationModes_should_work

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1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.junit.jupiter.MockitoExtension;4import org.mockitousage.IMethods;5import org.mockitoutil.TestBase;6import static org.assertj.core.api.Assertions.assertThat;7import static org.assertj.core.api.Assertions.catchThrowable;8import static org.mockito.Mockito.*;9@ExtendWith(MockitoExtension.class)10class StubbingWithThrowablesTest extends TestBase {11 void should_allow_stubbing_void_methods_to_throw_exceptions() {12 IMethods mock = mock(IMethods.class);13 doThrow(new RuntimeException()).when(mock).simpleMethod();14 assertThat(catchThrowable(mock::simpleMethod)).isInstanceOf(RuntimeException.class);15 }16 void should_allow_stubbing_non_void_methods_to_throw_exceptions() {17 IMethods mock = mock(IMethods.class);18 when(mock.objectReturningMethodNoArgs()).thenThrow(new RuntimeException());19 assertThat(catchThrowable(mock::objectReturningMethodNoArgs)).isInstanceOf(RuntimeException.class);20 }21 void should_allow_stubbing_non_void_methods_to_throw_exceptions_with_different_return_type() {22 IMethods mock = mock(IMethods.class);23 when(mock.objectReturningMethodNoArgs()).thenThrow(new RuntimeException());24 assertThat(catchThrowable(mock::objectReturningMethodNoArgs)).isInstanceOf(RuntimeException.class);25 }26 void should_allow_stubbing_non_void_methods_to_throw_exceptions_with_different_return_type_2() {27 IMethods mock = mock(IMethods.class);28 when(mock.objectReturningMethodNoArgs()).thenThrow(new RuntimeException());29 assertThat(catchThrowable(mock::objectReturningMethodNoArgs)).isInstanceOf(RuntimeException.class);30 }31 void should_allow_stubbing_non_void_methods_to_throw_exceptions_with_different_return_type_3() {32 IMethods mock = mock(IMethods.class);33 when(mock.objectReturningMethodNoArgs()).thenThrow(new RuntimeException());34 assertThat(catchThrowable(mock::objectReturningMethodNoArgs)).isInstanceOf(RuntimeException.class);35 }

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StackOverFlow community discussions

Questions
Discussion

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There are two options I'd advise here.

Option 1 (separate unit tests suite for service and mapper)

If you want to unit test then mock your mapper in the service (other dependencies as well OFC) and test service logic only. For the mapper write a separate unit test suite. I created a code example here: https://github.com/jannis-baratheon/stackoverflow--mapstruct-mapper-testing-example.

Excerpts from the example:

Service class:

public class AService {
    private final ARepository repository;
    private final EntityMapper mapper;

    public AService(ARepository repository, EntityMapper mapper) {
        this.repository = repository;
        this.mapper = mapper;
    }

    public ADto getResource(int id) {
        AnEntity entity = repository.getEntity(id);
        return mapper.toDto(entity);
    }
}

Mapper:

import org.mapstruct.Mapper;

@Mapper
public interface EntityMapper {
    ADto toDto(AnEntity entity);
}

Service unit test:

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import org.junit.Before;
import org.junit.Test;

public class AServiceTest {

    private EntityMapper mapperMock;

    private ARepository repositoryMock;

    private AService sut;

    @Before
    public void setup() {
        repositoryMock = mock(ARepository.class);
        mapperMock = mock(EntityMapper.class);

        sut = new AService(repositoryMock, mapperMock);
    }

    @Test
    public void shouldReturnResource() {
        // given
        AnEntity mockEntity = mock(AnEntity.class);
        ADto mockDto = mock(ADto.class);

        when(repositoryMock.getEntity(42))
                .thenReturn(mockEntity);
        when(mapperMock.toDto(mockEntity))
                .thenReturn(mockDto);

        // when
        ADto resource = sut.getResource(42);

        // then
        assertThat(resource)
                .isSameAs(mockDto);
    }
}

Mapper unit test:

import static org.assertj.core.api.Assertions.assertThat;

import org.junit.Before;
import org.junit.Test;

public class EntityMapperTest {

    private EntityMapperImpl sut;

    @Before
    public void setup() {
        sut = new EntityMapperImpl();
    }

    @Test
    public void shouldMapEntityToDto() {
        // given
        AnEntity entity = new AnEntity();
        entity.setId(42);

        // when
        ADto aDto = sut.toDto(entity);

        // then
        assertThat(aDto)
            .hasFieldOrPropertyWithValue("id", 42);
    }
}

Option 2 (integration tests for service and mapper + mapper unit tests)

The second option is to make an integration test where you inject a real mapper to the service. I'd strongly advise not to put too much effort into validating the mapping logic in integration tests though. It's very likely to get messy. Just smoke test the mappings and write unit tests for the mapper separately.

Summary

To sum up:

  • unit tests for the service (using a mocked mapper) + unit tests for the mapper
  • integration tests for the service (with real mapper) + unit tests for the mapper

I usually choose option number two where I test main application paths with MockMvc and write complete unit tests for smaller units.

https://stackoverflow.com/questions/52255896/proper-way-of-using-and-testing-generated-mapper

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Most used method in StubbingWithThrowablesTest