### Question:
CommonsQueryEngine implements IQueryEngine { protected abstract QueryResult executeWorkFlow(LogicalWorkflow workflow) throws ConnectorException; protected  CommonsQueryEngine(ConnectionHandler connectionHandler); @Override final void asyncExecute(String queryId, LogicalWorkflow workflow, IResultHandler resultHandler); @Override final void pagedExecute(String queryId, LogicalWorkflow workflow, IResultHandler resultHandler,
                                   int pageSize); @Override final QueryResult execute(String queryId, LogicalWorkflow workflow);  }### Answer:
@Test public void testExecuteWorkFlow() throws Exception { LogicalWorkflow logicalworkFlow = mock(LogicalWorkflow.class); commonsQueryEngineStub.execute("", logicalworkFlow); assertTrue("executeWorkFlow is executed", executeWorkFlow); assertEquals("The workflow is correct", workflowSend, logicalworkFlow); }