Mock测试

Mockito allows to configure the return values of its mocks via a fluent API. Unspecified method calls return "empty" values:

• null for objects
• 0 for numbers
• false for boolean
• empty collections for collections

利用ArgumentCaptor（参数捕获器）捕获方法

参数进行验证通过 ArgumentCaptor 对象的forClass(Class
    
      clazz)方法来构建ArgumentCaptor对象。然后便可在验证时对方法的参数进行捕获，最后验证捕获的参数值。如果方法有多个参数都要捕获验证，那就需要创建多个ArgumentCaptor对象处理。 当某个对象进行了多次调用后，比如mock对象。这时调用argument.getValue()获取到的是最后一次调用的参数。如果要获取所有的参数值可以调用argument.getAllValues()，它将返回参数值的List
    

@Test    public void testArgumentCaptor() {        when(userDao.findByUser("hs", "123")).thenReturn(new User("hs", "123"));        when(userDao.findByUser("ys", "321")).thenReturn(new User("ys", "321"));        assertThat(userService.findByUser("hs", "123"), is(new User("hs", "123")));        assertThat(userService.findByUser("ys", "321"), is(new User("ys", "321")));        ArgumentCaptor
    
      captor = ArgumentCaptor.forClass(String.class);        verify(userDao, times(2)).findByUser(captor.capture(), captor.capture());        System.out.println(captor.getValue());        System.out.println(captor.getAllValues());    }
    

321[hs, 123, ys, 321]

unit -mock without autowire

In Spring Boot applications, by using Mockito, you replace the @Autowired components in the class you want to test with mock objects.