Fitnesse:_u异常_;：java.lang.NullPointerException在fixture

我与fitnesse（20140630）+maven合作

但当我运行测试时，我得到异常：

异常：java.lang.NullPointerException 在com.playtech.openapi.core.fitnesse.tests.Fixtures.createContext（Fixtures.java:14）[文件：/D:/fitnessets/IntegrationTestsMobileAdmin/com playtech-openapi前端服务/com.playtech.openapi.core.fitnesse.tests/target/classes/] 在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）[rt.jar:1.7.0_21] 在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）[rt.jar:1.7.021] 在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）[rt.jar:1.7.021] 在java.lang.reflect.Method.invoke（Method.java:601）[rt.jar:1.7.0_21] 在fitnesse.slim.fixtureInteraction.DefaultInteraction.methodInvoke（DefaultInteraction.java:16）[fitnesse standalone.jar] 在fitnesse.slim.MethodExecutor.callMethod（MethodExecutor.java:43）[fitnesse standalone.jar] 在fitnesse.slim.MethodExecutor.invokeMethod（MethodExecutor.java:30）[fitnesse standalone.jar] 在fitnesse.slim.MethodExecutor.findAndInvoke（MethodExecutor.java:52）[fitnesse standalone.jar] 在fitnesse.slim.FixtureMethodExecutor.execute（FixtureMethodExecutor.java:20）[fitnesse standalone.jar] 在fitnesse.slim.StatementExecutor.getMethodExecutionResult（StatementExecutor.java:121）[fitnesse standalone.jar] 在fitnesse.slim.StatementExecutor.callAndAssign（StatementExecutor.java:109）[fitnesse standalone.jar] 在fitnesse.slim.instructions.CallAndAssignInstruction.executeInternal（CallAndAssignInstruction.java:38）[fitnesse standalone.jar] 在fitnesse.slim.instructions.Instruction.execute（Instruction.java:30）[fitnesse standalone.jar] 在fitnesse.slim.listexcutor$Executive.executeStatement（listexcutor.java:50）[fitnesse standalone.jar] 在fitnesse.slim.listexcutor$Executive.executeStatements（listexcutor.java:44）[fitnesse standalone.jar] 在fitnesse.slim.listexcutor.execute（listexcutor.java:84）[fitnesse standalone.jar] 在fitnesse.slim.SlimServer.executeInstructions（SlimServer.java:107）[fitnesse standalone.jar] 在fitnesse.slim.SlimServer.processTheInstructions（SlimServer.java:94）[fitnesse standalone.jar] 在fitnesse.slim.SlimServer.processonesetof指令（SlimServer.java:68）[fitnesse standalone.jar] 在fitnesse.slim.SlimServer.tryProcessInstructions（SlimServer.java:54）[fitnesse standalone.jar] 位于fitnesse.slim.SlimServer.service（SlimServer.java:40）[fitnesse standalone.jar] 位于fitnesse.slim.SlimService.handle（SlimService.java:164）[fitnesse standalone.jar] 在fitnesse.slim.SlimService.acceptOne（SlimService.java:172）[fitnesse standalone.jar] 在fitnesse.slim.SlimService.accept（SlimService.java:134）[fitnesse standalone.jar] 在fitnesse.slim.SlimService.startWithFactory（SlimService.java:65）[fitnesse standalone.jar] 在fitnesse.slim.SlimService.main（SlimService.java:51）[fitnesse standalone.jar]

---

这是我的fitnesse内容

!！目录-R2-g-p-f-h

!！定义测试系统{slim}！路径 D:\FitnessTests\IntegrationTestsMobileAdmin\com playtech openapi前端服务\com.playtech.openapi.core.fitnesse.tests\target\classes

!！pomFile D:\FitnessTests\IntegrationTestsMobileAdmin\com playtech openapi前端服务\com.playtech.openapi.core.fitnesse.tests\pom。xml@compile

|导入|| com.playtech.openapi.core.fitnesse.tests|

!！定义折叠设置{true}

!！定义折叠_拆卸{true}

！|脚本| com.playtech.openapi.core.fitnesse.tests.Fixtures| |$CONTEXT=| createContext|

这是我的Java代码

public class Tests extends AbstractClientIT {

    public String createContext(){
        return "1234567";
    }
}


public class Fixtures {

    private Tests service2;


    public String createContext () throws RemoteException {
        return service2.createContext();
    }

}

---

service2尚未初始化，因此这是您的NPE

我是FitNesse的新手，但今天我在《使用FitNesse进行测试驱动的.NET开发》一书第24页上找到了这一段：

如果您创建了一个页面（或试图创建一个页面），但出现NullPointerException错误，或者该页面没有显示，则表明您选择了错误的名称。FitNesse只将CamelCase单词视为有效的页面名称，并且对此非常严格。页面名称必须以大写字母开头，并至少包含一个大写字母。还有一个问题需要注意：连续的大写字母。FitNesse不喜欢它们。因此，页面名称中的大写字母必须至少由一个小写字母分隔。这个惯例给FitNesse的新手带来了很多麻烦，但过一段时间你就会习惯了

public String createContext () throws RemoteException {
    return service2.createContext();
}