unit-testing - 在阻止的 spock 测试中抛出 MissingPropertyException

Question

我一直在使用 spock 对我的 java 项目进行单元测试，但遇到了问题。我有一个实用方法可以从 http 请求中获取参数，或者如果 http 请求为空并尝试用 spock 测试它，则为空字符串。我的测试是这样的:

package foo.bar.test

import foo.bah.HttpRequestPropertyLoader
import spock.lang.Unroll
import javax.servlet.http.HttpServletRequest
import spock.lang.Specification

class HttpRequestPropertyLoaderTest extends Specification {

    HttpRequestPropertyLoader subjectUnderTest
    def result

    def setup() {
        subjectUnderTest = new HttpRequestPropertyLoader()
    }

    @Unroll("When my http request is #nullOrNot then when I get parameter from it the response=#response" )
    def "Test load data from request"() {
        given:
        HttpServletRequest mockHttpRequest = Mock()
        mockHttpRequest.getAttribute("foo") >> "bar"
        when:
        result = subjectUnderTest.loadStringFromHttpRequest(httpRequest, "foo")
        then:
        result == response
        where:
        httpRequest     | response | nullOrNot
        null            |  ""      | "null"
        mockHttpRequest | "bar"    | "not null"
    }
}

但是，当我运行此测试时，出现以下错误:
groovy.lang.MissingPropertyException: No such property: mockHttpRequest for class: foo.bar.test.HttpRequestPropertyLoaderTest at foo.bar.test.HttpRequestPropertyLoaderTest.Test load data from request(HttpRequestPropertyLoaderTest.groovy)
经过一番研究，我了解到where块在 given 之前运行块，因此出现错误，但只是想知道是否有解决方法？

我知道要使用测试外部的变量，我需要用 @Shared 注释该变量。注释，这对我来说似乎是不好的做法。每个测试都应该与其他测试完全分开运行，所以不要真的想要一个对象来保持它在测试之间的状态。

是否可以将 Mock 对象设置为以其他方式从 where 块返回？

Answer 1

按照 tim_yates 建议查看 https://code.google.com/p/spock/issues/detail?id=15#c4 ，我找到了一个相当优雅的解决方案，它不涉及使用 @Shared注解。测试定义现在看起来像这样:

package foo.bar.test

import foo.bah.HttpRequestPropertyLoader
import spock.lang.Unroll
import javax.servlet.http.HttpServletRequest
import spock.lang.Specification

class HttpRequestPropertyLoaderTest extends Specification {

    HttpRequestPropertyLoader subjectUnderTest
    def result

    def setup() {
        subjectUnderTest = new HttpRequestPropertyLoader()
    }

    @Unroll("When my http request is #nullOrNot then when I get parameter from it the response=#response" )
    def "Test load data from request"() {
        when:
        result = subjectUnderTest.loadStringFromHttpRequest(httpRequest, "foo")
        then:
        result == response
        where:
        httpRequest << {
            HttpServletRequest mockHttpRequest = Mock()
            mockHttpRequest.getAttribute("foo") >> "bar"
            [null, mockHttpRequest]
        }()
        response << ["", "bar"]
        nullOrNot << ["null", "not null"]
    }
}