### Question:
SingleProjectQueryEngine extends CommonsQueryEngine { protected abstract QueryResult execute(Project project, Connection<T> connection) throws ConnectorException; SingleProjectQueryEngine(ConnectionHandler connectionHandler);   }### Answer:
@Test public void testExecute() throws Exception { Project project = mock(Project.class); Connection connection = mock(Connection.class); uniqueProjectQueryEngineStub.execute(project, connection); assertTrue("executeWorkFlow is executed", executeExecute); assertEquals("The workflow is correct", project, projectSend); assertEquals("The connection is correct", connection, connectionSend); }