project.buildDir == new File(rootDir, "build")

        when:
        project.buildDir = "abc"
        then:
        child1.buildDir == new File(rootDir, "abc")
    }

    def cachingOfAnt() {
        expect:
        project.ant.is(testAntBuilder)
        project.ant.is(project.ant)
    }

    def ant() {
        given: