Add tests for kwarg overriding engine/backend from urls

tests/test_db.py

@@ -188,6 +188,16 @@ def test_db_parsing(url, engine, name, host, user, passwd, port):
         assert config['OPTIONS'] == {'reconnect': 'true'}
 
 
+def test_custom_db_engine():
+    """Override ENGINE determined from schema."""
+    env_url = 'postgres://enigma:[email protected]:5431/dbname'
+
+    engine = 'mypackage.backends.whatever'
+    url = Env.db_url_config(env_url, engine=engine)
+
+    assert url['ENGINE'] == engine
+
+
 def test_postgres_complex_db_name_parsing():
     """Make sure we can use complex postgres host."""
     env_url = (

tests/test_email.py

@@ -22,3 +22,13 @@ def test_smtp_parsing():
     assert url['EMAIL_PORT'] == 587
     assert url['EMAIL_USE_TLS'] is True
     assert url['EMAIL_FILE_PATH'] == ''
+
+
+def test_custom_email_backend():
+    """Override EMAIL_BACKEND determined from schema."""
+    url = 'smtps://[email protected]:[email protected]:587'
+
+    backend = 'mypackage.backends.whatever'
+    url = Env.email_url_config(url, backend=backend)
+
+    assert url['EMAIL_BACKEND'] == backend

tests/test_search.py

@@ -86,6 +86,16 @@ def test_elasticsearch_parsing(url, engine, scheme):
     assert url["URL"].startswith(scheme + ":")
 
 
+def test_custom_search_engine():
+    """Override ENGINE determined from schema."""
+    env_url = 'elasticsearch://127.0.0.1:9200/index'
+
+    engine = 'mypackage.backends.whatever'
+    url = Env.db_url_config(env_url, engine=engine)
+
+    assert url['ENGINE'] == engine
+
+
 @pytest.mark.parametrize('storage', ['file', 'ram'])
 def test_whoosh_parsing(whoosh_url, storage):
     post_limit = 128 * 1024 * 1024