JMeter

Question

关于 JMeter Function Helper Dialog，它是一个很棒的工具，但是在期望变量可用时无法使用它执行某些函数

__split 函数具有强制变量名，例如在调用 ${__split(a,a,)}

时抛出异常

另外函数 __isVarDefined 得到一个 NullPointerException:

2018-02-12 08:03:20,603 ERROR o.a.j.e.ClientJMeterEngine: Error calling function ${__split(a,a,)}
java.lang.UnsupportedOperationException: null
    at org.apache.jmeter.threads.UnmodifiableJMeterVariables.put(UnmodifiableJMeterVariables.java:73) ~[ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.functions.SplitFunction.execute(SplitFunction.java:99) ~[ApacheJMeter_functions.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:137) ~[ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:112) ~[ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.functions.gui.FunctionHelper.actionPerformed(FunctionHelper.java:200) [ApacheJMeter_core.jar:4.0 r1823414]
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source) [?:1.8.0_25]
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at javax.swing.JComponent.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.processEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.processEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Window.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.access0(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.security.AccessController.doPrivileged(Native Method) [?:1.8.0_25]
    at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source) [?:1.8.0_25]
    at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.security.AccessController.doPrivileged(Native Method) [?:1.8.0_25]
    at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_25]
    at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_25]

JMeter 4 中的新函数 __isVarDefined 也得到一个 NullPointerException：

2018-02-11 10:32:38,093 ERROR o.a.j.e.ClientJMeterEngine: Error calling function ${__isVarDefined(a)}
java.lang.NullPointerException: null
    at org.apache.jmeter.functions.IsVarDefined.execute(IsVarDefined.java:53) ~[ApacheJMeter_functions.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:137) ~[ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:112) ~[ApacheJMeter_core.jar:4.0 r1823414]
    at org.apache.jmeter.functions.gui.FunctionHelper.actionPerformed(FunctionHelper.java:200) [ApacheJMeter_core.jar:4.0 r1823414]
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) [?:1.8.0_25]
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source) [?:1.8.0_25]
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at javax.swing.JComponent.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.processEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.processEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.Container.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Window.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.Component.dispatchEvent(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.access0(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.security.AccessController.doPrivileged(Native Method) [?:1.8.0_25]
    at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source) [?:1.8.0_25]
    at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.awt.EventQueue.run(Unknown Source) [?:1.8.0_25]
    at java.security.AccessController.doPrivileged(Native Method) [?:1.8.0_25]

JMeter 是否应该在 Function Helpers 中初始化变量，或者它是否无关紧要，因此需要添加一个警告，说明它在没有变量上下文的情况下不可用？

Answer 1

函数助手对话框中通常不可测试的函数需要一些上下文：

属性设置
变量集 ...

这是在以下增强中确定的限制：

https://bz.apache.org/bugzilla/show_bug.cgi?id=61834

如果您有任何想法，请随时贡献补丁，例如：

可以创建一个空的 JMeterVariable
一个文本区域，用户可以在其中输入一些Groovy代码来填充此对象或其他属性

这样任何函数都可以测试。

JMeter - 某些函数无法在 Function Helper 中执行

JMeter - some functions can't be executed in Function Helper

jmeter-4.0