data = "<img src=\"http://example/foo.jpg\">" //
                + "<img src=\"http://example/bar.jpg\">";
        expected = "http://example/foo.jpg";
        assertGetThumbnailUrl(data, expected);

        data = "<img src=\"http://example/foo.jpg\">" //
                + "<img src=\"http://example/bar.jpg\" width=\"100\" height=\"100\">";
        expected = "http://example/bar.jpg";
        assertGetThumbnailUrl(data, expected);