feat: 실패 테스트 케이스 추가 ( 삭제, 생성 ) (DASOMBE-14)

Author: si-zero

src/test/java/dmu/dasom/api/domain/executive/service/ExecutiveServiceTest.java

@@ -133,6 +133,20 @@ void deleteExecutive_success() {
         verify(executiveRepository, times(1)).delete(entity);
     }
 
+    @Test
+    @DisplayName("임원진 멤버 삭제 - 실패")
+    void deleteExecutive_fail() {
+        // given
+        Long id = 999L;
+        when(executiveRepository.findById(id)).thenReturn(Optional.empty());
+
+        // when
+        CustomException exception = assertThrows(CustomException.class, () -> {executiveService.deleteExective(id);});
+
+        // then
+        assertEquals(ErrorCode.EXECUTIVE_NOT_FOUND, exception.getErrorCode());
+    }
+
     @Test
     @DisplayName("임원진 멤버 수정 - 성공")
     void updateExecutive_success() {