generate vCard in utils.py; added Tests

tests/test_vcard_export.py

@@ -0,0 +1,62 @@
+import pytest
+from pathlib import Path
+
+from app import app, db, Frage
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    # Use a temporary directory for vcards and a temporary sqlite db
+    # temp DB file
+    db_file = tmp_path / "test.db"
+
+    # Configure app for testing
+    app.config['TESTING'] = True
+    app.config['SQLALCHEMY_DATABASE_URI'] = f'sqlite:///{db_file}'
+
+    # Use temp vcards dir by setting app.BASE_DIR
+    app.BASE_DIR = str(tmp_path)
+
+    # ensure clean DB and create tables
+    with app.app_context():
+        db.drop_all()
+        db.create_all()
+        # create a sample question so POST processing loops over it
+        q = Frage(text='Testfrage?')
+        db.session.add(q)
+        db.session.commit()
+
+    with app.test_client() as test_client:
+        yield test_client
+
+
+def test_vcard_created_after_submit(client, tmp_path):
+    data = {
+        'vorname': 'Max',
+        'nachname': 'Mustermann',
+        'strasse': 'Musterstraße',
+        'hausnummer': '1',
+        'plz': '12345',
+        'ort': 'Musterstadt',
+        'land': 'Deutschland',
+        'telefon_vorwahl': '49',
+        'telefon_nummer': '1234567',
+        'email': 'max@example.com',
+        'frage_1': 'Antwort'
+    }
+
+    # Submit the form
+    res = client.post('/', data=data, follow_redirects=True)
+    assert res.status_code == 200
+
+    # find vcards dir under tmp_path (app.BASE_DIR)
+    vcards_dir = Path(app.BASE_DIR) / 'vcards'
+    files = list(vcards_dir.glob('*.vcf'))
+    assert len(files) == 1
+
+    content = files[0].read_text(encoding='utf-8')
+    assert 'BEGIN:VCARD' in content
+    assert 'VERSION:4.0' in content
+    assert 'FN:Max Mustermann' in content
+    assert 'EMAIL;TYPE=internet:max@example.com' in content
+    assert 'ADR:' in content