Patch testcases added

Author: BrawlerXull

test/taskfunctions/path_test.dart

@@ -0,0 +1,55 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:taskwarrior/app/models/models.dart';
+import 'package:taskwarrior/app/utils/taskfunctions/patch.dart';
+
+void main() {
+  group('patch function', () {
+    test('should patch description', () {
+      Task initialTask = Task(
+        (b) => b
+          ..id = 1
+          ..description = 'Task 3'
+          ..status = 'pending'
+          ..start = DateTime.utc(2023, 1, 1)
+          ..priority = 'H'
+          ..project = 'Project A'
+          ..tags.replace(['tag1', 'tag2'])
+          ..uuid = 'uuid3'
+          ..description = 'Task 3 Description'
+          ..entry = DateTime(2024, 7, 20)
+          ..modified = DateTime(2024, 7, 21)
+          ..start = DateTime(2024, 7, 22)
+          ..due = DateTime(2024, 7, 23),
+      );
+      Map<String, dynamic> updates = {'description': 'Updated description'};
+
+      Task patchedTask = patch(initialTask, updates);
+
+      expect(patchedTask.description, 'Updated description');
+    });
+
+    test('should handle unknown keys gracefully', () {
+      Task initialTask = Task(
+        (b) => b
+          ..id = 1
+          ..description = 'Task 3'
+          ..status = 'pending'
+          ..start = DateTime.utc(2023, 1, 1)
+          ..priority = 'H'
+          ..project = 'Project A'
+          ..tags.replace(['tag1', 'tag2'])
+          ..uuid = 'uuid3'
+          ..description = 'Task 3 Description'
+          ..entry = DateTime(2024, 7, 20)
+          ..modified = DateTime(2024, 7, 21)
+          ..start = DateTime(2024, 7, 22)
+          ..due = DateTime(2024, 7, 23),
+      );
+      Map<String, dynamic> updates = {'unknownField': 'some value'};
+
+      Task patchedTask = patch(initialTask, updates);
+
+      expect(patchedTask, initialTask);
+    });
+  });
+}