def testRepositoryNoDupArks(self):
"""Check that the Repostiories can't have duplicate arks.
Again, since it is a char & we allow blank, can't use db unique
check"""
r = Repository()
r.name = "test repo"
r.ark = "fakeARK"
r.save()
r2 = Repository()
r2.name = "test repo"
r2.ark = "fakeARK"
self.assertRaises(ValueError, r2.save)
try:
r2.save()
except ValueError, e:
self.assertEqual(e.args, ("Unit with ark fakeARK already exists",))
