模拟Spock的最后一堂课

可以嘲笑模拟最后的课程吗？如果是这样,怎么样？搜索结果提出了这个要点,这似乎意味着如此,但我找不到任何这样做的例子.我还发现论坛帖子说不支持模拟最终类.

本规范:

@Grab('org.spockframework:spock-core:1.0-groovy-2.4')
@Grab('cglib:cglib-nodep:3.1')

import spock.lang.*

class Test extends Specification {
    def 'lol'() {
        given: 
        def s = Mock(String) {
            size() >> 10
        }

        expect:
        s.size() == 10        
    }
}

JUnit 4 Runner, Tests: 1, Failures: 1, Time: 29 Test Failure:
lol(Test) org.spockframework.mock.CannotCreateMockException:
Cannot create mock for class java.lang.String because Java mocks cannot mock final classes.
If the code under test is written in Groovy, use Groovy mock.

@Grab('org.spockframework:spock-core:1.0-groovy-2.4')
@Grab('cglib:cglib-nodep:3.1')

import spock.lang.*

class Test extends Specification {
    def 'lol'() {
        given: 
        def s = GroovyMock(String) {
            size() >> 10
        }

        expect:
        s.size() == 10        
    }
}