Mockito-如何验证从未调用过模拟

用这个 ：

import static org.mockito.Mockito.verifyZeroInteractions;// ...private PrintStream backup = System.out;@Beforepublic void setUp() {    System.setOut(mock(PrintStream.class));}@Afterpublic void tearDown() {    verifyZeroInteractions(System.out);    System.setOut(backup);}