articles-backend-app

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package by.andd3dfx.validators;
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import static org.hamcrest.CoreMatchers.is;
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import static org.hamcrest.MatcherAssert.assertThat;
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import by.andd3dfx.dto.AuthorDto;
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import by.andd3dfx.persistence.dao.AuthorRepository;
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import jakarta.validation.ConstraintValidatorContext;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.mockito.InjectMocks;
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import org.mockito.Mock;
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import org.mockito.Mockito;
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import org.mockito.junit.jupiter.MockitoExtension;
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@ExtendWith(MockitoExtension.class)
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class ExistingAuthorValidatorTest {
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    @Mock
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    private AuthorRepository authorRepositoryMock;
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    @Mock
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    private ConstraintValidatorContext contextMock;
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    @InjectMocks
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    private ExistingAuthorValidator existingAuthorValidator;
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    @Test
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    void isValidForNullAuthor() {
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        assertThat(existingAuthorValidator.isValid(null, contextMock), is(false));
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    }
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    @Test
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    void isValidForAuthorWithNullId() {
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        assertThat(existingAuthorValidator.isValid(new AuthorDto(), contextMock), is(false));
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    }
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    @Test
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    void isValidForAuthorWhichNotPresentInDb() {
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        AuthorDto author = new AuthorDto();
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        final long AUTHOR_ID = 21L;
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        author.setId(AUTHOR_ID);
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        Mockito.when(authorRepositoryMock.existsById(AUTHOR_ID)).thenReturn(false);
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        assertThat(existingAuthorValidator.isValid(author, contextMock), is(false));
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        Mockito.verify(authorRepositoryMock).existsById(AUTHOR_ID);
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    }
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    @Test
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    void isValid() {
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        AuthorDto author = new AuthorDto();
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        final long AUTHOR_ID = 21L;
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        author.setId(AUTHOR_ID);
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        Mockito.when(authorRepositoryMock.existsById(AUTHOR_ID)).thenReturn(true);
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        assertThat(existingAuthorValidator.isValid(author, contextMock), is(true));
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        Mockito.verify(authorRepositoryMock).existsById(AUTHOR_ID);
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    }
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}
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