使用given.post（）时，在io.restassured.internal.support.PathSupport`中使用Nullpointer

我正在使用restAssured和Junit构建集成测试，并在调用以下代码时：

private void login(){ cookie = given() .baseUri("localhost:9000") .when() .formParam("username", "myUser") .formParam("password", "myPass") .formParam("realm", "realmParam") .post("/login") .then() .extract() .header("Set-Cookie"); } 

我收到以下错误：

java.lang.NullPointerException：无法在null对象上调用方法trim（）

 at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91) at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:48) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:35) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) at java_lang_String$trim.call(Unknown Source) at io.restassured.internal.support.PathSupport.mergeAndRemoveDoubleSlash(PathSupport.groovy:28) at io.restassured.internal.support.PathSupport$mergeAndRemoveDoubleSlash$0.callStatic(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:56) at io.restassured.internal.support.PathSupport$mergeAndRemoveDoubleSlash$0.callStatic(Unknown Source) at io.restassured.internal.RequestSpecificationImpl.getTargetPath(RequestSpecificationImpl.groovy:1450) at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:812) at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166) at io.restassured.internal.RequestSpecificationImpl.partiallyApplyPathParams(RequestSpecificationImpl.groovy:1751) at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:812) at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182) at io.restassured.internal.RequestSpecificationImpl.newFilterContext(RequestSpecificationImpl.groovy:1151) at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:812) at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182) at io.restassured.internal.RequestSpecificationImpl.applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy:1720) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:812) at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182) at io.restassured.internal.RequestSpecificationImpl.applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy:1728) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:812) at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48) at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182) at io.restassured.internal.RequestSpecificationImpl.post(RequestSpecificationImpl.groovy:172) at io.restassured.internal.RequestSpecificationImpl.post(RequestSpecificationImpl.groovy) at discovery.utils.VMS.Requests.login(Requests.java:57) at discovery.utils.VMS.Requests.(Requests.java:16) at discovery.utils.VMS.TestData.(TestData.java:36) at discovery.utils.VMS.TestData.(TestData.java:30) at discovery.users.EntitlementOverrideTest.overridenClientIsEntitledToAnyPackage(EntitlementOverrideTest.java:42) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) 

但我不能为我的生活找出原因！ 我在抛出并观察到该方法的输入的行上设置了断点，事实certificate它被调用的次数比我对此测试的预期要多（该方法连接2个部分的url）和输入实际上在此失败测试中定义的处理没有错误。 但是由于某种原因，它被称为多次，其中总是包含一个空参数，因此失败。 谷歌搜索建议我的项目中可能存在依赖冲突，但我一直无法找到。

澄清一点，我不是在问Nullpointer是什么，我完全清楚。 更确切地说，这是让我感到困惑的内心运作。无效指针只是我对这个图书馆内部缺乏了解的表现:)

这是怎么回事？

Answer 1

我有同样的问题。 我可以通过删除.baseUri("localhost:9000")并使用.port(9000)来设置端口来修复它。