JUnit Question

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martinmk - 26 Nov 2007 18:06 GMT

Hi All,

Is it feasible to test already compiled source file with JUnit? A task
was given to me to test the bytecode (.class file) without having the
source code. I do have the API docs and based on that I can come up
with oracles to determine the expected outcome. I do not know how to
do that with JUnit.

Thanks a million

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Hunter Gratzner - 26 Nov 2007 18:19 GMT

> Hi All,
>
> Is it feasible to test already compiled source file with JUnit?

Yes, that's JUnits normal mode of operation.

> I do not know how to
> do that with JUnit.

Read the JUnit documentation.

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Alex - 26 Nov 2007 18:52 GMT

As usual. (Use Eclipse, it does it automatically):

public class RandomIntTest extends TestCase {

    public void testNextInt() {
        int one=random.nextInt();
        int two=random.nextInt();
        assertFalse("Two random ints are equal "+one+"="+two, one==two);
    }

}
-- Alex

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Lew - 26 Nov 2007 23:53 GMT

> As usual. (Use Eclipse, it does it automatically):
>
[quoted text clipped - 7 lines]
>
> }

The problem with this particular test is that two consecutive random ints can
legitimately be equal.

A good pseudorandom generator will be no more prejudiced against a second
value equal to the first than any other second value.

Signature

Lew

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