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null pointer exception while running unit test

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i am running my unit test but for some reason i am getting a null pointer on this line


messageSource.getMessage("", new String[] {
"a", "b" }, request.getLocale()));

Please find below the method that my unit test will be based on:

Please find below my unit test:

Please see stack trace below:

line 100 for my loginController is shown below:

I am assuming that i need to mock message source. If this is the cause of my exception, how can i mock the messagesource in my unit test please?

However when i run my application it works fine no null pointer, its only when i run the unit test that i get the null pointer exception.

Thanks in advance.
author & internet detective
Posts: 40198
Eclipse IDE VI Editor Java
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Where is messageSource defined? I don't see it as an instance variable, parameter or local variable.
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