模拟组织时java MissingMethodInvocationException异常。阿帕奇。log4j。水平班

Question

下面的代码生成org。莫基托。例外。滥用。MissingMethodInvocation异常：

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

Answer 1

你检查了MissingMethodInvocationException异常消息了吗

上面写着：

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.

要么类Level是最终的（显然不像我记得扩展这个类那样），要么getSyslogEquivalent是最终的（最佳猜测）

因此，您应该修改设计或测试设计，或者尝试Powermock，它提供了最终的类/方法模拟

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