해시태그 목록 조회 기능 구현(issue #307)

backend/src/main/java/develup/api/HashTagApi.java

@@ -0,0 +1,30 @@
+package develup.api;
+
+import java.util.List;
+import develup.api.common.ApiResponse;
+import develup.application.hashtag.HashTagResponse;
+import develup.application.hashtag.HashTagService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@Tag(name = "해시태그 API")
+class HashTagApi {
+
+    private final HashTagService hashTagService;
+
+    public HashTagApi(HashTagService hashTagService) {
+        this.hashTagService = hashTagService;
+    }
+
+    @GetMapping("/hash-tags")
+    @Operation(summary = "해시태그 목록 조회 API", description = "해시태그 목록을 조회합니다.")
+    public ResponseEntity<ApiResponse<List<HashTagResponse>>> getHashTags() {
+        List<HashTagResponse> responses = hashTagService.getHashTags();
+
+        return ResponseEntity.ok(new ApiResponse<>(responses));
+    }
+}

backend/src/main/java/develup/api/SolutionCommentApi.java

@@ -6,9 +6,9 @@
 import develup.api.common.ApiResponse;
 import develup.application.auth.Accessor;
 import develup.application.solution.comment.CreateSolutionCommentResponse;
+import develup.application.solution.comment.SolutionCommentRepliesResponse;
 import develup.application.solution.comment.SolutionCommentRequest;
 import develup.application.solution.comment.SolutionCommentService;
-import develup.application.solution.comment.SolutionCommentRepliesResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;

backend/src/main/java/develup/application/hashtag/HashTagService.java

@@ -0,0 +1,21 @@
+package develup.application.hashtag;
+
+import java.util.List;
+import develup.domain.hashtag.HashTagRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public class HashTagService {
+
+    private final HashTagRepository hashTagRepository;
+
+    public HashTagService(HashTagRepository hashTagRepository) {
+        this.hashTagRepository = hashTagRepository;
+    }
+
+    public List<HashTagResponse> getHashTags() {
+        return hashTagRepository.findAll().stream()
+                .map(HashTagResponse::from)
+                .toList();
+    }
+}

backend/src/test/java/develup/api/ApiTestSupport.java

@@ -4,6 +4,7 @@
 import develup.api.auth.AuthArgumentResolver;
 import develup.api.auth.CookieAuthorizationExtractor;
 import develup.application.auth.AuthService;
+import develup.application.hashtag.HashTagService;
 import develup.application.member.MemberService;
 import develup.application.mission.MissionService;
 import develup.application.solution.SolutionService;
@@ -38,8 +39,11 @@ public class ApiTestSupport {
     protected SolutionCommentService solutionCommentService;
 
     @MockBean
-    protected CookieAuthorizationExtractor cookieAuthorizationExtractor;
+    protected HashTagService hashTagService;
 
     @MockBean
     protected AuthArgumentResolver argumentResolver;
+
+    @MockBean
+    protected CookieAuthorizationExtractor cookieAuthorizationExtractor;
 }

backend/src/test/java/develup/api/HashTagApiTest.java

@@ -0,0 +1,37 @@
+package develup.api;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import java.util.List;
+import develup.application.hashtag.HashTagResponse;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.mockito.BDDMockito;
+
+class HashTagApiTest extends ApiTestSupport {
+
+    @Test
+    @DisplayName("해시 태그 목록을 조회한다.")
+    void getHashTags() throws Exception {
+        List<HashTagResponse> responses = List.of(
+                new HashTagResponse(1L, "JAVA"),
+                new HashTagResponse(2L, "JAVASCRIPT")
+        );
+        BDDMockito.given(hashTagService.getHashTags())
+                .willReturn(responses);
+
+        mockMvc.perform(get("/hash-tags"))
+                .andDo(print())
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.data[0].id", is(1)))
+                .andExpect(jsonPath("$.data[0].name", equalTo("JAVA")))
+                .andExpect(jsonPath("$.data[1].id", is(2)))
+                .andExpect(jsonPath("$.data[1].name", equalTo("JAVASCRIPT")))
+                .andExpect(jsonPath("$.data.length()", is(2)));
+    }
+}