test(utils): getMIMETypeFromResponse 테스트 코드 추가 (#131)

packages/utils/src/file/getMIMETypeFromFile/getMIMETypeFromFile.spec.ts

@@ -3,24 +3,27 @@ import { getMIMETypeFromFile } from '.';
 describe('getMIMETypeFromFile', () => {
   it('should return the MIME type of a valid file', () => {
     const file = new File([''], 'example.png', { type: 'image/png' });
-    const result = getMIMETypeFromFile(file);
-    expect(result).toBe('image/png');
+    const mimeType = getMIMETypeFromFile(file);
+    expect(mimeType).toBe('image/png');
   });
 
   it('should return an empty string if the file type is an empty string', () => {
     const file = new File([''], 'example', { type: '' });
-    const result = getMIMETypeFromFile(file);
-    expect(result).toBe('');
+    const mimeType = getMIMETypeFromFile(file);
+    expect(mimeType).toBe('');
   });
 
   it('should return an empty string if the file type is invalid', () => {
     const file = new File([''], 'example.unknown');
-    const result = getMIMETypeFromFile(file);
-    expect(result).toBe('');
+    const mimeType = getMIMETypeFromFile(file);
+    expect(mimeType).toBe('');
   });
 
   it('should return an empty string if the argument is invalid', () => {
-    const result = getMIMETypeFromFile(NaN as any);
-    expect(result).toBe('');
+    const mimeType1 = getMIMETypeFromFile(NaN as unknown as File);
+    expect(mimeType1).toBe('');
+
+    const mimeType2 = getMIMETypeFromFile(123 as unknown as File);
+    expect(mimeType2).toBe('');
   });
 });

packages/utils/src/file/getMIMETypeFromFile/index.ts

@@ -1,3 +1,3 @@
 export const getMIMETypeFromFile = (file: File) => {
-  return file?.type ?? '';
+  return file.type ?? '';
 };

packages/utils/src/file/getMIMETypeFromResponse/getMIMETypeFromResponse.spec.ts

@@ -0,0 +1,32 @@
+import { getMIMETypeFromResponse } from '.';
+
+describe('getMIMETypeFromResponse', () => {
+  it('should return the correct MIME type from the response headers', () => {
+    const headers = new Headers();
+    headers.set('Content-Type', 'image/png');
+
+    const mockResponse = new Response(null, { headers });
+
+    const mimeType = getMIMETypeFromResponse(mockResponse);
+    expect(mimeType).toBe('image/png');
+  });
+
+  it('should return an empty string if the Content-Type header is not present', () => {
+    const headers = new Headers();
+    const mockResponse = new Response(null, { headers });
+
+    const mimeType = getMIMETypeFromResponse(mockResponse);
+    expect(mimeType).toBe('');
+  });
+
+  it('should return an empty string when given an invalid argument', () => {
+    const mockResponse1 = {} as unknown as Response;
+    const mockResponse2 = 123 as unknown as Response;
+
+    const mimeType1 = getMIMETypeFromResponse(mockResponse1);
+    expect(mimeType1).toBe('');
+
+    const mimeType2 = getMIMETypeFromResponse(mockResponse2);
+    expect(mimeType2).toBe('');
+  });
+});

packages/utils/src/file/getMIMETypeFromResponse/index.ts

@@ -1,10 +1,3 @@
 export const getMIMETypeFromResponse = (response: Response) => {
-  try {
-    return response.headers.get('Content-Type') ?? '';
-  } catch (err: any) {
-    console.error(
-      `Failed to get the MIME type from Response. message: ${err.message}`
-    );
-    return '';
-  }
+  return response.headers?.get('Content-Type') ?? '';
 };