简单Grails控制器单元测试中的Nullpointer [英] Nullpointer in simple grails controller unit test

问题描述

对于一个非常基本的Grails 2.4.1控制器的单元测试，我需要解决一个奇怪的问题.

I need a little assistance with a strange issue I am facing unit testing a very basic Grails 2.4.1 controller.

使用此控制器:

class AuthenticationEventController {
    def index() {
        // Sorry, ajax only!
        if(!request.xhr) {
            redirect(controller: "main")
            return false
        }

        render(template: "index")
        return
    }
}

这个测试:

@TestFor(AuthenticationEventController)
class AuthenticationEventControllerSpec extends Specification {

    void "Test that the index rejects non-ajax calls"() {
        given:
            request.isXhr = { false }

        when:
            controller.index()

        then:
            response.redirectedUrl == '/main'
    }
}

我在"controller.index()"调用上收到NullPointerException.

I get a NullPointerException on the "controller.index()" call.

java.lang.NullPointerException
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130)
    at org.codehaus.groovy.grails.orm.support.GrailsTransactionTemplate.execute(GrailsTransactionTemplate.groovy:85)
    at au.com.intrinsicminds.advansys.controller.AuthenticationEventControllerSpec.Test that the index rejects non-ajax calls(AuthenticationEventControllerSpec.groovy:17)

推荐答案

问题最有可能是您正在使用

the problem most likely is you are using

import grails.transaction.Transactional

代替

import org.springframework.transaction.annotation.Transactional

groovy类中的注释的

.

for @Transactional annotation in the groovy class.

为什么没有关于主要区别的明确答案，或者为什么测试对此做得不好. 同样，通常只有在您要测试一个后面有2个更多类层的类时，才会发生这种情况.

why, no clear answer as to the major difference or why the test doesn't do well with this. Also this usually only happens if you are testing a class with 2 more class layers behind it.

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