def task = project.task('custom', type: CustomTask)
        task.doStuff()

        then:
        task.property == 'some value'
    }

    @LeaksFileHandles("script jar is held open")
    def canApplyABuildScript() {
        when:
        def project = buildProject()
        project.apply from: resources.getResource('ProjectBuilderTest.gradle')

        then:
        project.tasks.hello instanceof DefaultTask