tdd mock test

hiking-api/src/test/java/com/dseoki/api/hiking/HikingServiceTest.java

@@ -0,0 +1,133 @@
+package com.dseoki.api.hiking;
+
+import com.dseoki.api.entity.Hiking;
+import com.dseoki.api.hiking.domain.HikingDto;
+import com.dseoki.api.hiking.domain.HikingResponse;
+import org.junit.jupiter.api.Test;
+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.core.io.ResourceLoader;
+
+import java.time.LocalDateTime;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.*;
+
+@SpringBootTest
+public class HikingServiceTest {
+
+    private final ResourceLoader resourceLoader;
+
+    // SpringBootTest는 전체 컨텍스트를 로드하고 빈을 주입한다. 또한 모든 인스턴스를 Mocking 한다. @MockBean 어노테이션을 생략할 수 있다.
+    private final HikingService hikingService;
+
+    @MockBean
+    HikingRepository hikingRepository;
+
+    @Autowired
+    public HikingServiceTest(ResourceLoader resourceLoader, HikingService hikingService) {
+        this.resourceLoader = resourceLoader;
+        this.hikingService = hikingService;
+    }
+
+    @Test
+    public void searchHikingExceptionTest() {
+        when(hikingRepository.findAll())
+                .thenThrow(new RuntimeException("Database connection error"));
+
+        assertThatThrownBy(() -> {
+            hikingService.searchHiking();
+        })
+        .isInstanceOf(RuntimeException.class)
+        .hasMessage("Database connection error");
+    }
+
+    @Test
+    public void searchHikingTest() {
+        Hiking hiking1 = new Hiking();
+        hiking1.setId(1333L);
+        hiking1.setHikeStartDate(LocalDateTime.of(2024, 2, 15, 9, 00));
+        hiking1.setHikeEndDate(LocalDateTime.of(2024, 2, 15, 9, 30));
+
+        Hiking hiking2 = new Hiking();
+        hiking2.setId(2L);
+        hiking2.setHikeStartDate(LocalDateTime.of(2024, 5, 15, 9, 00));
+        hiking2.setHikeEndDate(LocalDateTime.of(2024, 5, 15, 9, 30));
+
+        when(hikingRepository.findAll())
+                .thenReturn(Arrays.asList(hiking1, hiking2))
+                .thenThrow(new RuntimeException("Database connection error"));
+
+        List<HikingResponse> result = hikingService.searchHiking();
+
+        // assertj 사용 권장: 가독성이 좋음
+        assertThat(result.size()).isEqualTo(2);
+        assertThat(result.get(0).getId()).isEqualTo(1333L);
+    }
+
+    @Test
+    public void insertHikingExceptionTest() {
+        HikingDto hikingDto = new HikingDto();
+
+        doThrow(new IllegalArgumentException("Failed to save hiking data")).when(hikingRepository).save(any(Hiking.class));
+
+        assertThatThrownBy(() -> {
+            hikingService.insertHiking(hikingDto);
+        })
+        .isInstanceOf(IllegalArgumentException.class)
+        .hasMessage("Failed to save hiking data");
+    }
+
+    @Test
+    public void insertHikingTest() {
+        HikingDto hikingDto = new HikingDto();
+        hikingDto.setTitle("Hiking test");
+        hikingDto.setHikeStartDate("2021-02-13 09:00");
+        hikingDto.setHikeEndDate("2021-02-13 18:00");
+        hikingDto.setDistance(10);
+        hikingDto.setElevation(10);
+        hikingDto.setEstimatedDuration(10);
+        hikingDto.setDescription("mock tdd test description...");
+
+        // 테스트 실행
+        hikingService.insertHiking(hikingDto);
+
+        // Mock 리포지토리의 save 메서드가 호출되었는지 확인
+        verify(hikingRepository, times(1)).save(any(Hiking.class));
+    }
+
+    @Test
+    public void 예외테스트1() {
+        /**
+         * isInstanceOf()은 발생한 예외가 해당 인스턴스인지 확인한다.
+         * hasMessageContaining()는 예외 메시지가 특정 문자열을 포함하는지 확인힌다.
+         */
+        assertThatThrownBy(() -> { throw new Exception("error 발생한 곳!!"); })
+                .isInstanceOf(Exception.class)
+                .hasMessageContaining("error 발생한 곳!!");
+    }
+    @Test
+    public void 예외테스트2() {
+        // assertj 권장 방식
+        assertThatThrownBy(() -> {
+            String[] str = {"one", "two", "three"};
+            System.out.println(str[4]);
+        })
+        .isInstanceOf(ArrayIndexOutOfBoundsException.class);
+
+        /** junit5 방식
+        assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
+            String[] str = {"one", "two", "three"};
+            System.out.println(str[4]);
+        },
+        "ArrayIndexOutOfBoundsException이 아님!!");
+        */
+
+        System.out.println("예외가 발생하지 않으면 출력됨!! 예외 이후에 발생되는 부분 작성 해야 함");
+    }
+
+}