test(presignedUrl): 테스트 추가

Author: m-a-king

src/main/java/com/somemore/global/imageupload/service/PresignedUrl.java

@@ -19,7 +19,7 @@ public String removeQueryString() {
     }
 
     public static PresignedUrl from(String url) {
-        if (url.contains("?")) {
+        if (url != null && url.contains("?")) {
             return new PresignedUrl(url);
         }
         log.error("PresignedUrl({})이 올바르지 않은 형식입니다.", url);

src/test/java/com/somemore/global/imageupload/service/PresignedUrlTest.java

@@ -0,0 +1,65 @@
+package com.somemore.global.imageupload.service;
+
+import com.somemore.global.exception.ImageUploadException;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static com.somemore.global.exception.ExceptionMessage.UPLOAD_FAILED;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class PresignedUrlTest {
+
+    @Test
+    @DisplayName("쿼리 문자열이 포함된 URL에서 removeQueryString() 호출 시 쿼리 문자열 제거 후 반환")
+    void removeQueryString_shouldReturnUrlWithoutQuery() {
+        // given
+        String url = "https://example.com/file.png?param=value";
+        PresignedUrl presignedUrl = PresignedUrl.from(url);
+
+        // when
+        String result = presignedUrl.removeQueryString();
+
+        // then
+        assertEquals("https://example.com/file.png", result);
+    }
+
+    @Test
+    @DisplayName("쿼리 문자열이 없는 URL을 PresignedUrl.from()으로 생성하면 예외 발생")
+    void from_shouldThrowException_whenUrlHasNoQueryString() {
+        // given
+        String url = "https://example.com/file.png";
+
+        // when
+        // then
+        ImageUploadException exception = assertThrows(ImageUploadException.class,
+                () -> PresignedUrl.from(url));
+
+        assertEquals(UPLOAD_FAILED.getMessage(), exception.getMessage());
+    }
+
+    @Test
+    @DisplayName("null 값을 PresignedUrl.from()으로 전달하면 예외 발생")
+    void from_shouldThrowException_whenUrlIsNull() {
+        // given
+        String url = null;
+
+        // when
+        // then
+        assertThrows(ImageUploadException.class,
+                () -> PresignedUrl.from(url));
+    }
+
+    @Test
+    @DisplayName("removeQueryString() 호출 시 올바르게 동작하고 예외가 발생하지 않음")
+    void removeQueryString_shouldWorkCorrectly() {
+        // given
+        String url = "https://example.com/file.png?param=value";
+        PresignedUrl presignedUrl = PresignedUrl.from(url);
+
+        // when
+        // then
+        assertDoesNotThrow(presignedUrl::removeQueryString);
+    }
+}