def test_distributionsourcepackage_to_sourcepackagename(self):
# A sourcepackagename can be retrieved distribution source package.
package = self.factory.makeDistributionSourcePackage()
spn = package_to_sourcepackagename(package)
self.assertTrue(ISourcePackageName.providedBy(spn))
self.assertEqual(package.sourcepackagename,
ISourcePackageName(package))
