### Question:
SingleProjectQueryEngine extends CommonsQueryEngine { protected abstract void asyncExecute(String queryId, Project project, Connection connection, IResultHandler resultHandler) throws ConnectorException; SingleProjectQueryEngine(ConnectionHandler connectionHandler);   }### Answer:
@Test public void testasyncExecute() throws Exception { String queryID = "queryID"; Project workflow = mock(Project.class); IResultHandler resultHandler = mock(IResultHandler.class); Connection connection = mock(Connection.class); uniqueProjectQueryEngineStub.asyncExecute(queryID, workflow, connection, resultHandler); assertTrue("executeWorkFlow is executed", executeAsyncExecute); assertEquals("The queryId is correct", queryIdSend, queryID); assertEquals("The workflow is correct", workflowSend, workflow); assertEquals("The resultHandler is correct", resultHandler, resultHandlerSend); }