Created ImageDownloader test

test/common/services/ImageDownloader.test.ts

@@ -0,0 +1,25 @@
+import { Mock } from 'ts-mockery';
+import { AxiosInstance } from 'axios';
+import { ImageDownloader } from '../../../src/common/services/ImageDownloader';
+import { windowMock } from '../../mocks/WindowMock';
+
+describe('ImageDownloader', () => {
+  const get = jest.fn();
+  const axios = Mock.of<AxiosInstance>({ get });
+  let imageDownloader: ImageDownloader;
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    (global as any).URL = { createObjectURL: () => '' };
+
+    imageDownloader = new ImageDownloader(axios, windowMock);
+  });
+
+  test('calls URL with response type blob', async () => {
+    get.mockResolvedValue({ data: {} });
+
+    await imageDownloader.saveImage('/foo/bar.png', 'my-image.png');
+
+    expect(get).toHaveBeenCalledWith('/foo/bar.png', { responseType: 'blob' });
+  });
+});