when:
        compile(source('Test', 'public class Test {}'))

        then:
        assertCompiled 'Test'
    }

    def "can compile several classes at once"() {
        when:
        compile(source('A', 'public class A {}'), source('B', 'public class B {}'))

        then:
        assertCompiled 'A', 'B'
    }

    def "reports compilation errors"() {
        when: