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Detecting memory leak with Junit

Ali Ekber
Ranch Hand

Joined: Jun 12, 2005
Posts: 41
I am new to JUnit and was wondering if JUnit can detect possible memory leaks in a large application. Thx.
Lasse Koskela
author
Sheriff

Joined: Jan 23, 2002
Posts: 11962
    
    5
No, it can't.

That is, by itself it can't. Of course you might be able to write a JUnit test that can figure out whether there was a memory leak but then it's not really JUnit doing it... (you could try a very primitive--and somewhat unreliable--analysis with totalMemory() and freeMemory() from the java.lang.Runtime class)

Or you could just use a profiling tool that can detect memory leaks. I haven't used one for finding memory leak in a while but at least OptimizeIT and JProbe advertize memory leak detection in their feature lists. JProfiler might also help in locating the leaks.


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