Provide helpful message if parameter cannot be set. #1465
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| @@ -73,6 +73,10 @@ private Object createTestUsingFieldInjection() throws Exception { | |||
| int index = annotation.value(); | |||
| try { | |||
| field.set(testClassInstance, parameters[index]); | |||
| } catch (IllegalAccessException e) { | |||
| throw new Exception("Cannot set parameter '" + field.getName() | |||
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Are you sure we shouldn't set the cause of this exception?
Also, throwing ``Exceptionis rare. Perhaps we should throw a newIllegalAccessException`
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You're right with the cause. The problem with creating a new IllegalAccessException is that it doesn't have a constructor with a cause argument.
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You can use https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html#initCause(java.lang.Throwable) to set the cause.on the IllegalAccessException. Can we do that?
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And again you're right. I fixed it and already squashed the commits.
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When I have your okay for the pull request I will squash the commits and merge to master. |
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For private @parameter fields is users get an exception like "java.lang.IllegalAccessException: Class ... can not access a member of class X with modifiers private" The new message "Cannot set parameter 'parameter'. Ensure that the the field 'parameter' is public." tells the user what they should do. The reason for adding this feature is the Stackoverflow question https://stackoverflow.com/questions/44522046/reflection-exception-in-parameterized-junit-test-using-array-parameter/44522988
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For private @parameter fields is users get an exception like "java.lang.IllegalAccessException: Class ... can not access a member of class X with modifiers private" The new message "Cannot set parameter 'parameter'. Ensure that the the field 'parameter' is public." tells the user what they should do.
The reason for adding this feature is the Stackoverflow question https://stackoverflow.com/questions/44522046/reflection-exception-in-parameterized-junit-test-using-array-parameter/44522988