Correct test with distinct()

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

vulnerabilities/tests/test_fix_models.py

@@ -50,8 +50,9 @@ def setUp(self):
 
     def test_get_vulnerable_packages(self):
         vuln_packages = Package.objects.vulnerable()
-        assert vuln_packages.count() == 10
-        vuln_purls = [pkg.purl for pkg in vuln_packages.only(*PackageURL._fields)]
+        assert vuln_packages.count() == 20
+        assert vuln_packages.distinct().count() == 10
+        vuln_purls = [pkg.purl for pkg in vuln_packages.distinct().only(*PackageURL._fields)]
         assert vuln_purls == [
             "pkg:generic/nginx/test@0",
             "pkg:generic/nginx/test@1",