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2008-08-28T16:05:14.757
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Spec# looks very interesting! When something like that isn't available, I generally test non-private methods with a run-time null-check, and assertions for internal methods. Rather than code the null check explicitly in each method, I delegate that to a utilities class with a check null method: <pre><code>/** * Checks to see if an object is null, and if so * generates an IllegalArgumentException with a fitting message. * * @param o The object to check against null. * @param name The name of the object, used to format the exception message * * @throws IllegalArgumentException if o is null. */ public static void checkNull(Object o, String name) throws IllegalArgumentException { if (null == o) throw new IllegalArgumentException(name + " must not be null"); } public static void checkNull(Object o) throws IllegalArgumentException { checkNull(o, "object"); } // untested: public static void checkNull(Object... os) throws IllegalArgumentException { for(Object o in os) checkNull(o); } </code></pre> Then checking turns into: <pre><code>public void someFun(String val1, String val2) throws IllegalArgumentException { ExceptionUtilities.checkNull(val1, "val1"); ExceptionUtilities.checkNull(val2, "val2"); /** alternatively: ExceptionUtilities.checkNull(val1, val2); **/ /** ... **/ } </code></pre> That can be added with editor macros, or a code-processing script. Edit: The verbose check could be added this way as well, but I think it's significantly easier to automate the addition of a single line.
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1. POPassing null to a method
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1. USrcreswick
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