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vasu takasivasu takasi 

how to pass values to a list<string> in test method

hi i have a code like list var=iphidden.split(':'); var.remove(0). while i am writing test method for this , it showing exception like System.NullPointerException: Attempt to de-reference a null object. How to solve it? Please help me.
Best Answer chosen by Admin (Salesforce Developers) 

I assume that you did not set iphidden before calling the function, thus it would be null and not have any functions to call, such as String.split(). make sure there is a value assigned before attempting to call instance methods.