Unit-testing with JUnit throws NullPointerException for Controllers

[Justin]

Hello.

I am a new-bee to Play. As you know, it is a wonderful framework.
But, there's a small problem that irritates me.

I tried to test methods of Controllers. And an exception was thrown
when I called the method in my JUnit test function.
Interestingly, there was no exception when calling Controller methods
of which return type is not 'void'.

As you know, the return types of methods of Controllers are mostly
'void'.

Do you have any idea?

[Maigx liN]

what exception

2011/5/31 Justin <ppa...@gmail.com>

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[Julien Tournay]

How do you "call" those methods ?

--
Real Programmers don't need comments-- the code is obvious.

[Justin]

Thanks for your concerns, Maigx and Julien.

The trace failure list is following:
java.lang.NullPointerException
at play.classloading.enhancers.ControllersEnhancer
$ControllerInstrumentation.isActionCallAllowed(ControllersEnhancer.java:
183)
at
controllers.CsTransferController.transfer(CsTransferController.java)
at CsTest.testTransferCoupons(CsTest.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod
$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:
15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:
41)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:
20)
at play.test.PlayJUnitRunner$StartPlay
$1$1$1.execute(PlayJUnitRunner.java:73)
at play.Invoker$Invocation.run(Invoker.java:265)
at play.Invoker.invokeInThread(Invoker.java:67)
at play.test.PlayJUnitRunner$StartPlay
$1$1.evaluate(PlayJUnitRunner.java:68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
76)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at play.test.PlayJUnitRunner.run(PlayJUnitRunner.java:48)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:
49)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:
38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:
390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:
197)


Julien,
I called a method from a UnitTest-inherited class like below:

public class CsTest extends UnitTest {
...
@Test
public void testTransferCoupons() throws
SecurityException, NoSuchMethodException,
IllegalAccessException, InvocationTargetException
{
CsTransferController.transfer(...); //
CsTransferController is a child-class of Controller
....
}

Thanks.