感谢user1690588，我发现了问题. Grails IntegrationSpec IllegalStateException 给了我一个提示:探针不是在测试中失败，而是在测试中过去了！

Thanks to user1690588 I found the problem. Grails IntegrationSpec IllegalStateException gave me the clue: the probem was not in the test which failed, but in the test which passed!

基本上，ParamIntegrationSpec测试具有:

Basically, the ParamIntegrationSpec test had:

@TestFor(ParamService)

这将终止所有后续测试.我不知道TestFor做什么，只在所有示例中都看到了.

This kills any subsequent test. I have no idea what TestFor does, only seen it in all examples.

要修复，只需从工作测试中删除该行即可.

To fix, just removed that line from the working test.