feat: add a common upload endpoint (#7806)

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/helper/specs/uploadHelper.spec.js

@@ -0,0 +1,53 @@
+import { uploadFile } from '../uploadHelper';
+import axios from 'axios';
+
+// Mocking axios using jest-mock-axios
+global.axios = axios;
+jest.mock('axios');
+
+describe('#Upload Helpers', () => {
+  afterEach(() => {
+    // Cleaning up the mock after each test
+    axios.post.mockReset();
+  });
+
+  it('should send a POST request with correct data', async () => {
+    const mockFile = new File(['dummy content'], 'example.png', {
+      type: 'image/png',
+    });
+    const mockResponse = {
+      data: {
+        file_url: 'https://example.com/fileUrl',
+        blob_key: 'blobKey123',
+        blob_id: 'blobId456',
+      },
+    };
+
+    axios.post.mockResolvedValueOnce(mockResponse);
+
+    const result = await uploadFile(mockFile);
+
+    expect(axios.post).toHaveBeenCalledWith(
+      '/api/v1/upload',
+      expect.any(FormData),
+      { headers: { 'Content-Type': 'multipart/form-data' } }
+    );
+
+    expect(result).toEqual({
+      fileUrl: 'https://example.com/fileUrl',
+      blobKey: 'blobKey123',
+      blobId: 'blobId456',
+    });
+  });
+
+  it('should handle errors', async () => {
+    const mockFile = new File(['dummy content'], 'example.png', {
+      type: 'image/png',
+    });
+    const mockError = new Error('Failed to upload');
+
+    axios.post.mockRejectedValueOnce(mockError);
+
+    await expect(uploadFile(mockFile)).rejects.toThrow('Failed to upload');
+  });
+});