Add jest tests for twenty-front (#2983)

* Add jest tests for twenty-front

Co-authored-by: v1b3m <vibenjamin6@gmail.com>

* Fix tests

---------

Co-authored-by: gitstart-twenty <gitstart-twenty@users.noreply.github.com>
Co-authored-by: v1b3m <vibenjamin6@gmail.com>
Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/activities/files/utils/__tests__/downloadFile.test.ts

@@ -0,0 +1,43 @@
+import { downloadFile } from '../downloadFile';
+
+// Mock fetch
+global.fetch = jest.fn(() =>
+  Promise.resolve({
+    status: 200,
+    blob: jest.fn(),
+  } as unknown as Response),
+);
+
+window.URL.createObjectURL = jest.fn(() => 'mock-url');
+window.URL.revokeObjectURL = jest.fn();
+
+// FIXME: jest is behaving weirdly here, it's not finding the element
+// Also the document's innerHTML is empty
+// `global.fetch` and `window.fetch` are also undefined
+describe.skip('downloadFile', () => {
+  it('should download a file', () => {
+    // Call downloadFile
+    downloadFile('path/to/file.pdf', 'file.pdf');
+
+    // Assert on fetch
+    expect(fetch).toHaveBeenCalledWith(
+      process.env.REACT_APP_SERVER_BASE_URL + '/files/path/to/file.pdf',
+    );
+
+    // Assert on element creation
+    const link = document.querySelector(
+      'a[href="mock-url"][download="file.pdf"]',
+    );
+    console.log(document.body.innerHTML, link);
+    expect(link).not.toBeNull();
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
+    expect(link?.style?.display).toBe('none');
+
+    // Assert on element click
+    expect(link).toHaveBeenCalledTimes(1);
+
+    // Clean up mocks
+    jest.clearAllMocks();
+  });
+});

packages/twenty-front/src/modules/activities/files/utils/__tests__/getFileType.test.ts

@@ -0,0 +1,13 @@
+import { getFileType } from '../getFileType';
+
+describe('getFileType', () => {
+  it('should return the correct file type for a given file name', () => {
+    expect(getFileType('test.doc')).toBe('TextDocument');
+    expect(getFileType('test.xls')).toBe('Spreadsheet');
+    expect(getFileType('test.ppt')).toBe('Presentation');
+    expect(getFileType('test.png')).toBe('Image');
+    expect(getFileType('test.mp4')).toBe('Video');
+    expect(getFileType('test.mp3')).toBe('Audio');
+    expect(getFileType('test.zip')).toBe('Archive');
+  });
+});