QuickCheck properties for IntSet

[David Benbennick]

On 12/3/07, Don Stewart <dons at galois.com> wrote:
> > I wish I could use QuickCheck to write an actual unit test: that is,
> > an executable program that returns 0 on success, and non-zero on
> > failure.  Then we could put these properties in the tests/ directory,
> > and have them automatically executed.  Is anyone working on such a
> > feature for QuickCheck?
>
> The 'quickCheck' function does this, iirc.

I don't think so.  I do:

> cat foo.hs
import Test.QuickCheck
main = quickCheck False
> runhaskell foo.hs
Falsifiable, after 0 tests:
> echo $?
0

As far as I can see, quickCheck never causes an error exit to happen.
And it doesn't even return IO Bool, so I can't use quickCheck to write
my own function that calls System.Exit.exitFailure