Spock rightShift(模拟)运算符显然不起作用

Question

这是我的Spock单元测试:

def "when favorite color is red then doSomething produces empty list of things"() {
    given:
    FizzBuzz fizzBuzz = Mock(FizzBuzz)
    fizzBuzz.name >> 'Dark Helmet'
    fizzBuzz.attributes >> [:]
    fizzBuzz.attributes["favcolor"] >> 'red'
    fizzBuzz.attributes["age"] >> '36'

    Something something = new Something(fizzBuzz)

    when:
    Whoah whoah = something.doSomething()

    then:
    !whoah.things
}

这是FizzBuzz模拟:

public interface FizzBuzz extends Serializable {
    Map<String, Object> getAttributes();
}

当我运行这个时,我得到:

java.lang.NullPointerException: Cannot invoke method rightShift() on null object

at com.commercehub.houston.SomethingSpec.when favorite color is red then doSomething produces empty list of things fail(SomethingSpec.groovy:18)

Process finished with exit code 255

它在第18行引用的'null对象'是fizzBuzz其attributes映射或其映射.为什么？

Answer 1

您正在尝试使用多个级别的间接,并且>>正在应用于结果.attributes["favcolor"],该结果为null(因为它.attributes是一个空映射).相反,只需初始化地图:

fizzBuzz.attributes >> [favcolor: 'red', age: 36]

(另外,你真的age想成为一个字符串吗？)