java - 如何使用 Mockito 模拟 System.getProperty

Question

我在 org.mockito.plugins.MockMaker 文件中添加了 mock-maker-inline 文本并将其放在 test/resources/mockito-extensions 中

在我的测试用例中，我使用:

System system = mock(System.class);
when(system.getProperty("flag")).thenReturn("true");`

但是我得到以下异常:

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'.
For example:
    when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
   Those methods *cannot* be stubbed/verified.
   Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.

感谢任何建议

Answer 1

您也可以使用真正的方法，在每次测试前后准备和删除配置:

@Before
public void setUp() {
    System.setProperty("flag", "true");
}

@After
public void tearDown() {
    System.clearProperty("flag");
}