#2404 add missing test and revert some name changes

tests/unit_tests/_primaite/_simulator/_system/_applications/test_database_client.py

@@ -111,6 +111,19 @@ def test_query_when_client_is_closed(database_client_on_computer):
     assert database_client.query(sql="test") is False
 
 
+def test_query_fail_to_connect(database_client_on_computer):
+    """Database client query should return False if the connect attempt fails."""
+    database_client, computer = database_client_on_computer
+
+    def return_false():
+        return False
+
+    database_client.connect = return_false
+    database_client.connected = False
+
+    assert database_client.query(sql="test") is False
+
+
 def test_client_receives_response_when_closed(database_client_on_computer):
     """Database client receive should return False when it is closed."""
     database_client, computer = database_client_on_computer