Add some tests for the picture gallery

test_data/gallery.dart

@@ -0,0 +1,52 @@
+/*
+ * This file is part of wger Workout Manager <https://github.com/wger-project>.
+ * Copyright (C) 2020, 2021 wger Team
+ *
+ * wger Workout Manager is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wger Workout Manager is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import 'package:wger/models/gallery/image.dart' as gallery;
+
+List<gallery.Image> getTestImages() {
+  return [
+    gallery.Image(
+      id: 1,
+      url:
+          'https://github.com/wger-project/flutter/raw/master/android/fastlane/metadata/android/en-US/images/phoneScreenshots/01%20-%20workout%20plan.png?raw=true',
+      description: 'A very cool image from the gym',
+      date: DateTime(2021, 5, 30),
+    ),
+    gallery.Image(
+      id: 2,
+      url:
+          'https://github.com/wger-project/flutter/raw/master/android/fastlane/metadata/android/en-US/images/phoneScreenshots/02%20-%20workout%20log.png?raw=true',
+      description: 'Some description',
+      date: DateTime(2021, 4, 20),
+    ),
+    gallery.Image(
+      id: 3,
+      url:
+          'https://github.com/wger-project/flutter/raw/master/android/fastlane/metadata/android/en-US/images/phoneScreenshots/04%20-%20nutritional%20plan.png?raw=true',
+      description: '1 22 333 4444',
+      date: DateTime(2021, 5, 30),
+    ),
+    gallery.Image(
+      id: 4,
+      url:
+          'https://raw.githubusercontent.com/wger-project/flutter/master/android/fastlane/metadata/android/en-US/images/phoneScreenshots/05%20-%20weight.png',
+      description: '',
+      date: DateTime(2021, 2, 22),
+    )
+  ];
+}