Move shlink-web-component tests to their own folder

shlink-web-component/test/utils/services/ImageDownloader.test.ts

@@ -0,0 +1,21 @@
+import { ImageDownloader } from '../../../src/utils/services/ImageDownloader';
+import { windowMock } from '../../__mocks__/Window.mock';
+
+describe('ImageDownloader', () => {
+  const fetch = vi.fn();
+  let imageDownloader: ImageDownloader;
+
+  beforeEach(() => {
+    (global as any).URL = { createObjectURL: () => '' };
+
+    imageDownloader = new ImageDownloader(fetch, windowMock);
+  });
+
+  it('calls URL with response type blob', async () => {
+    fetch.mockResolvedValue({ blob: () => new Blob() });
+
+    await imageDownloader.saveImage('/foo/bar.png', 'my-image.png');
+
+    expect(fetch).toHaveBeenCalledWith('/foo/bar.png');
+  });
+});