java - 模拟 org.apache.log4j.Level 类时出现 MissingMethodInvocationException

Question

以下代码导致 org.mockito.exceptions.misusing.MissingMethodInvocationException:

Level level = mock(Level.class);
IOException ioException = new IOException("test");
when(level.getSyslogEquivalent()).thenThrow(ioException);

Answer 1

您是否检查了 MissingMethodInvocationException 异常消息？

它说:

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.
2. inside when() you don't call method on mock but on some other object.
3. the parent of the mocked class is not public.
   It is a limitation of the mock engine.

Level 类是最终类(显然不是我内存中扩展此类)或 getSyslogEquivalent 类是最终类(最佳猜测)。

因此，您应该修改您的设计或测试设计，或者试试 Powermock，它提供最终类/方法模拟。

希望对你有帮助