test: #101 자동완성 controller test작성

src/test/java/com/t3t/bookstoreapi/elastic/controller/AutocompleteControllerTest.java

@@ -0,0 +1,50 @@
+package com.t3t.bookstoreapi.elastic.controller;
+
+import com.t3t.bookstoreapi.elastic.service.AutocompleteService;
+import com.t3t.bookstoreapi.model.response.BaseResponse;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.when;
+
+class AutocompleteControllerTest {
+
+    @Mock
+    private AutocompleteService autocompleteService;
+
+    @InjectMocks
+    private AutocompleteController autocompleteController;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void autocomplete_ReturnsExpectedResults() throws IOException {
+        // Given
+        String prefix = "test";
+        List<String> expectedData = Arrays.asList("example");
+        BaseResponse<List<String>> serviceResponse = new BaseResponse<>();
+        serviceResponse.setData(expectedData);
+
+        when(autocompleteService.autocomplete(prefix)).thenReturn(serviceResponse);
+
+        // When
+        ResponseEntity<BaseResponse<List<String>>> response = autocompleteController.autocomplete(prefix);
+
+        // Then
+        assertEquals(HttpStatus.OK, response.getStatusCode());
+        assertEquals(expectedData, response.getBody().getData());
+    }
+}