test: add unit tests for OutreachyProjectModal

test/outreachy_project_modal_test.dart

@@ -0,0 +1,98 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:opso/modals/outreachy_project_modal.dart';
+
+void main() {
+  group('OutreachyProjectModal', () {
+    final tModal = OutreachyProjectModal(
+      name: 'TestProject',
+      description: 'A test Outreachy project',
+      skills: ['Python', 'Django'],
+      spots: 3,
+      year: 2023,
+    );
+
+    test('constructor sets all fields correctly', () {
+      expect(tModal.name, 'TestProject');
+      expect(tModal.description, 'A test Outreachy project');
+      expect(tModal.skills, ['Python', 'Django']);
+      expect(tModal.spots, 3);
+      expect(tModal.year, 2023);
+    });
+
+    test('copyWith returns updated instance', () {
+      final updated = tModal.copyWith(name: 'NewName', spots: 5);
+      expect(updated.name, 'NewName');
+      expect(updated.spots, 5);
+      expect(updated.description, tModal.description);
+      expect(updated.skills, tModal.skills);
+      expect(updated.year, tModal.year);
+    });
+
+    test('copyWith with no args returns equivalent object', () {
+      final copy = tModal.copyWith();
+      expect(copy.name, tModal.name);
+      expect(copy.spots, tModal.spots);
+      expect(copy.year, tModal.year);
+    });
+
+    test('toMap returns correct map', () {
+      final map = tModal.toMap();
+      expect(map['name'], 'TestProject');
+      expect(map['description'], 'A test Outreachy project');
+      expect(map['skills'], ['Python', 'Django']);
+      expect(map['spots'], 3);
+      expect(map['year'], 2023);
+    });
+
+    test('fromMap constructs correctly', () {
+      final map = {
+        'name': 'FromMapProject',
+        'description': 'From map desc',
+        'skills': ['Go', 'Rust'],
+        'spots': 2,
+        'year': 2022,
+      };
+      final modal = OutreachyProjectModal.fromMap(map);
+      expect(modal.name, 'FromMapProject');
+      expect(modal.skills, ['Go', 'Rust']);
+      expect(modal.spots, 2);
+      expect(modal.year, 2022);
+    });
+
+    test('toJson returns valid JSON string', () {
+      final jsonStr = tModal.toJson();
+      expect(jsonStr, isA<String>());
+      expect(jsonStr.contains('TestProject'), isTrue);
+    });
+
+    test('toString contains all fields', () {
+      final str = tModal.toString();
+      expect(str, contains('TestProject'));
+      expect(str, contains('Python'));
+      expect(str, contains('3'));
+      expect(str, contains('2023'));
+    });
+
+    test('skills supports empty list', () {
+      final modal = OutreachyProjectModal(
+        name: 'NoSkills',
+        description: 'desc',
+        skills: [],
+        spots: 1,
+        year: 2023,
+      );
+      expect(modal.skills, isEmpty);
+    });
+
+    test('spots can be zero', () {
+      final modal = OutreachyProjectModal(
+        name: 'ZeroSpots',
+        description: 'desc',
+        skills: ['Dart'],
+        spots: 0,
+        year: 2023,
+      );
+      expect(modal.spots, 0);
+    });
+  });
+}