From fdb5af7e7cc0998332e8d98d3dc93258f83983c3 Mon Sep 17 00:00:00 2001
From: dasomel <dasomell@gmail.com>
Date: Mon, 1 Sep 2025 20:38:26 +0900
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---
 .../impl/EgovSampleServiceImplUnitTest.java   | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/test/java/egovframework/example/sample/service/impl/EgovSampleServiceImplUnitTest.java

diff --git a/src/test/java/egovframework/example/sample/service/impl/EgovSampleServiceImplUnitTest.java b/src/test/java/egovframework/example/sample/service/impl/EgovSampleServiceImplUnitTest.java
new file mode 100644
index 0000000..905786f
--- /dev/null
+++ b/src/test/java/egovframework/example/sample/service/impl/EgovSampleServiceImplUnitTest.java
@@ -0,0 +1,54 @@
+package egovframework.example.sample.service.impl;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import egovframework.example.sample.service.SampleVO;
+
+/**
+ * EgovSampleServiceImpl의 순수 단위 테스트.
+ * <p>
+ * Spring 컨텍스트 로딩 없이 Mockito를 사용하여 Service의 로직만 검증합니다.
+ * {@link ExtendWith(MockitoExtension.class)}: Mockito 기능을 JUnit 5 테스트에 활성화합니다.
+ * {@link Mock}: 가짜(Mock) 객체를 생성합니다. 여기서는 DB와 연동하는 Mapper를 가짜로 만듭니다.
+ * {@link InjectMocks}: Mock 객체를 실제 테스트 대상 객체에 주입합니다.
+ */
+@ExtendWith(MockitoExtension.class)
+class EgovSampleServiceImplUnitTest {
+
+    @InjectMocks
+    private EgovSampleServiceImpl egovSampleService;
+
+    @Mock
+    private SampleMapper sampleMapper;
+
+    @Test
+    @DisplayName("ID로 게시글 조회 시, Mapper가 반환한 값을 그대로 반환해야 한다")
+    void selectSample_shouldReturnSampleVO_whenDataExists() throws Exception {
+        // given (준비)
+        // 1. Mapper가 반환할 가상의 결과 데이터 생성
+        SampleVO expectedResult = new SampleVO();
+        expectedResult.setId("SAMPLE-00001");
+        expectedResult.setName("Mockito 테스트");
+
+        // 2. Mock Mapper의 동작 정의: selectSample 메서드가 어떤 SampleVO 객체로 호출되든(any()) 위에서 만든 결과를 반환하도록 설정
+        when(sampleMapper.selectSample(any(SampleVO.class))).thenReturn(expectedResult);
+
+        // when (실행)
+        SampleVO actualResult = egovSampleService.selectSample(new SampleVO());
+
+        // then (검증)
+        assertNotNull(actualResult);
+        assertEquals(expectedResult.getId(), actualResult.getId(), "ID가 일치해야 합니다.");
+        assertEquals(expectedResult.getName(), actualResult.getName(), "이름이 일치해야 합니다.");
+    }
+}
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