feat: add tests

tests/test_app.py

@@ -0,0 +1,58 @@
+import pytest
+from app import create_app
+from models import db
+
+
+class TestAppFactory:
+    def test_create_app_default_config(self):
+        app = create_app()
+        assert app is not None
+        assert app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] is False
+    
+    def test_create_app_testing_config(self):
+        app = create_app('testing')
+        assert app is not None
+        assert app.config['TESTING'] is True
+        assert app.config['SQLALCHEMY_DATABASE_URI'] == 'sqlite:///:memory:'
+    
+    def test_create_app_development_config(self):
+        app = create_app('development')
+        assert app is not None
+        assert app.config['DEBUG'] is True
+
+
+class TestAppRoutes:
+    def test_index_route(self, client):
+        response = client.get('/')
+        assert response.status_code == 200
+    
+    def test_assessments_route_exists(self, client):
+        response = client.get('/assessments/')
+        assert response.status_code == 200
+    
+    def test_exercises_route_prefix_exists(self, client):
+        response = client.get('/exercises/')
+        assert response.status_code in [200, 404]  # Route exists but may need parameters
+    
+    def test_grading_route_prefix_exists(self, client):
+        response = client.get('/grading/')
+        assert response.status_code in [200, 404]  # Route exists but may need parameters
+
+
+class TestDatabase:
+    def test_database_creation(self, app):
+        with app.app_context():
+            db.create_all()
+            # Use inspector to get table names in SQLAlchemy 2.0+
+            from sqlalchemy import inspect
+            inspector = inspect(db.engine)
+            tables = inspector.get_table_names()
+            expected_tables = ['class_group', 'student', 'assessment', 'exercise', 'grading_element', 'grade']
+            for table in expected_tables:
+                assert table in tables
+    
+    def test_database_initialization(self, app):
+        with app.app_context():
+            assert db is not None
+            assert hasattr(db, 'session')
+            assert hasattr(db, 'Model')