}
task doStuff
'''
        inTestDirectory().withTasks('doStuff').run()
    }

    private TestFile createBuildSrc() {
        return testFile('buildSrc/src/main/java/BuildSrcClass.java') << '''
            public class BuildSrcClass { }
'''
    }

    private def createExternalJar() {
        ArtifactBuilder builder = artifactBuilder()
        builder.sourceFile('org/gradle/test/BuildClass.java') << '''

        errorOutput.contains('error message')
    }

    private TestFile createBuildSrc() {
        return file('buildSrc/src/main/java/BuildSrcClass.java') << '''
            public class BuildSrcClass { }
        '''
    }

    private def createExternalJar() {
        ArtifactBuilder builder = artifactBuilder();
        builder.sourceFile('org/gradle/test/BuildClass.java') << '''