Unit test examle

MovieTest.java

package donald.apiwithspringboot;

import donald.apiwithspringboot.controller.MovieController;
import donald.apiwithspringboot.model.Movie;
import donald.apiwithspringboot.repository.MovieRepository;
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.boot.test.mock.mockito.MockBean;
import org.springframework.test.context.junit4.SpringRunner;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertTrue;

import java.util.Optional;



@RunWith(SpringRunner.class)
@SpringBootTest
public class MovieTest {

    @MockBean(name = "movieRepository")
    MovieRepository movieRepository;

    @Autowired
    private MovieController movieController;


    @Test
    public void blogById () {


        Movie movie = new Movie();
        movie.setTitle("Testing");
        movie.setContent("A movie about Testing");
        movie.setId(1);
        movie.setAuthor("Donald");
        Mockito.when(movieRepository.findById(movie.getId())).thenReturn(Optional.of(movie));
        Optional<Movie> blog_service_abc = Optional.ofNullable(movieController.show("1"));
        assertThat(movie.getTitle()).isEqualTo(blog_service_abc.get().getTitle());
        assertTrue(movie.getContent().matches(".*movie about.*"));
    }


}