Logging in a GrailsUnitTestCase?

How do I setup logging in a grails unit-test?

开发者_Python百科

When I try log.info or log.debug, the .txt output files are empty, even after I tried adding a console appender. What's going on here?

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This might help, it's taken from the 1.2 release notes

By default, grails does not show the output from your tests. You can make it do so by passing -echoOut and/or -echoErr to test-app:

grails test-app -echoOut -echoErr

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If you extend GrailsUnitTestCase, you ought to be able to use mockLogging(), but the appenders you set up in Grails config won't be applied in a unit test, which works in isolation from the real framework. They'd only be available in integration tests.

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I wasn't able to use mockLogging in grails 1.3.7 with GrailsUnitTestCase either. I think there is probably a bug and it may work in Grails 2.0. Here is what I did to work around it:

class Foo {
    String name

    Long invokeLogTest(String key) {
        if (key.empty) {
            log.error("key was sent as empty string")
            return 10
        }  
    }
}

void testErrorCase() {
    def f = new Foo(name:'jp')
    f.metaClass.log = [error:{}]
    assert 10 == f.invokeLogTest("")
}