Add tests

mobile/test/asset_grid_data_structure_test.dart

@@ -0,0 +1,159 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/modules/home/ui/asset_list_v2/asset_grid_data_structure.dart';
+import 'package:openapi/api.dart';
+
+void main() {
+  final List<AssetResponseDto> testAssets = [];
+
+  for (int i = 0; i < 150; i++) {
+    int month = i ~/ 31;
+    int day = (i % 31).toInt();
+
+    DateTime date = DateTime(2022, month, day);
+
+    testAssets.add(AssetResponseDto(
+      type: AssetTypeEnum.IMAGE,
+      id: '$i',
+      deviceAssetId: '',
+      ownerId: '',
+      deviceId: '',
+      originalPath: '',
+      resizePath: '',
+      createdAt: date.toIso8601String(),
+      modifiedAt: date.toIso8601String(),
+      isFavorite: false,
+      mimeType: 'image/jpeg',
+      duration: '',
+      webpPath: '',
+      encodedVideoPath: '',
+    ));
+  }
+
+  final Map<String, List<AssetResponseDto>> groups = {
+    '2022-01-05': testAssets.sublist(0, 5).map((e) {
+      e.createdAt = DateTime(2022, 1, 5).toIso8601String();
+      return e;
+    }).toList(),
+    '2022-01-10': testAssets.sublist(5, 10).map((e) {
+      e.createdAt = DateTime(2022, 1, 10).toIso8601String();
+      return e;
+    }).toList(),
+    '2022-02-17': testAssets.sublist(10, 15).map((e) {
+      e.createdAt = DateTime(2022, 2, 17).toIso8601String();
+      return e;
+    }).toList(),
+    '2022-10-15': testAssets.sublist(15, 30).map((e) {
+      e.createdAt = DateTime(2022, 10, 15).toIso8601String();
+      return e;
+    }).toList()
+  };
+
+  group('Asset only list', () {
+    test('items < itemsPerRow', () {
+      final assets = testAssets.sublist(0, 2);
+      final renderList = assetsToRenderList(assets, 3);
+
+      expect(renderList.length, 1);
+      expect(renderList[0].assetRow!.assets.length, 2);
+    });
+
+    test('items = itemsPerRow', () {
+      final assets = testAssets.sublist(0, 3);
+      final renderList = assetsToRenderList(assets, 3);
+
+      expect(renderList.length, 1);
+      expect(renderList[0].assetRow!.assets.length, 3);
+    });
+
+    test('items > itemsPerRow', () {
+      final assets = testAssets.sublist(0, 20);
+      final renderList = assetsToRenderList(assets, 3);
+
+      expect(renderList.length, 7);
+      expect(renderList[6].assetRow!.assets.length, 2);
+    });
+
+    test('items > itemsPerRow partition 4', () {
+      final assets = testAssets.sublist(0, 21);
+      final renderList = assetsToRenderList(assets, 4);
+
+      expect(renderList.length, 6);
+      expect(renderList[5].assetRow!.assets.length, 1);
+    });
+
+    test('items > itemsPerRow check ids', () {
+      final assets = testAssets.sublist(0, 21);
+      final renderList = assetsToRenderList(assets, 3);
+
+      expect(renderList.length, 7);
+      expect(renderList[6].assetRow!.assets.length, 3);
+      expect(renderList[0].assetRow!.assets[0].id, '0');
+      expect(renderList[1].assetRow!.assets[1].id, '4');
+      expect(renderList[3].assetRow!.assets[2].id, '11');
+      expect(renderList[6].assetRow!.assets[2].id, '20');
+    });
+  });
+
+  group('Test grouped', () {
+    test('test grouped check months', () {
+      final renderList = assetGroupsToRenderList(groups, 3);
+
+      // Jan
+      // Day 1
+      // 5 Assets => 2 Rows
+      // Day 2
+      // 5 Assets => 2 Rows
+      // Feb
+      // Day 1
+      // 5 Assets => 2 Rows
+      // Oct
+      // Day 1
+      // 15 Assets => 5 Rows
+      expect(renderList.length, 18);
+      expect(renderList[0].type, RenderAssetGridElementType.monthTitle);
+      expect(renderList[0].date.month, 1);
+      expect(renderList[7].type, RenderAssetGridElementType.monthTitle);
+      expect(renderList[7].date.month, 2);
+      expect(renderList[11].type, RenderAssetGridElementType.monthTitle);
+      expect(renderList[11].date.month, 10);
+    });
+
+    test('test grouped check types', () {
+      final renderList = assetGroupsToRenderList(groups, 5);
+
+      // Jan
+      // Day 1
+      // 5 Assets
+      // Day 2
+      // 5 Assets
+      // Feb
+      // Day 1
+      // 5 Assets
+      // Oct
+      // Day 1
+      // 15 Assets => 3 Rows
+
+      final types = [
+        RenderAssetGridElementType.monthTitle,
+        RenderAssetGridElementType.dayTitle,
+        RenderAssetGridElementType.assetRow,
+        RenderAssetGridElementType.dayTitle,
+        RenderAssetGridElementType.assetRow,
+        RenderAssetGridElementType.monthTitle,
+        RenderAssetGridElementType.dayTitle,
+        RenderAssetGridElementType.assetRow,
+        RenderAssetGridElementType.monthTitle,
+        RenderAssetGridElementType.dayTitle,
+        RenderAssetGridElementType.assetRow,
+        RenderAssetGridElementType.assetRow,
+        RenderAssetGridElementType.assetRow
+      ];
+
+      expect(renderList.length, types.length);
+
+      for (int i = 0; i < renderList.length; i++) {
+        expect(renderList[i].type, types[i]);
+      }
+    });
+  });
+}