Upgrade test runner to derive from DiscoveryRunner.

evennia/scripts/tests.py

@@ -0,0 +1,43 @@
+# this is an optimized version only available in later Django versions
+from django.utils.unittest import TestCase
+
+from evennia.scripts.models import ScriptDB, ObjectDoesNotExist
+from evennia.utils.create import create_script
+from evennia.scripts.scripts import DoNothing
+
+
+class TestScriptDB(TestCase):
+    "Check the singleton/static ScriptDB object works correctly"
+    def setUp(self):
+        self.scr = create_script(DoNothing)
+
+    def tearDown(self):
+        try:
+            self.scr.delete()
+        except ObjectDoesNotExist:
+            pass
+        del self.scr
+
+    def test_delete(self):
+        "Check the script is removed from the database"
+        self.scr.delete()
+        self.assertFalse(self.scr in ScriptDB.objects.get_all_scripts())
+
+    def test_double_delete(self):
+        "What should happen? Isn't it already deleted?"
+        with self.assertRaises(ObjectDoesNotExist):
+            self.scr.delete()
+            self.scr.delete()
+
+    def test_deleted_script_fails_start(self):
+        "Would it ever be necessary to start a deleted script?"
+        self.scr.delete()
+        with self.assertRaises(ObjectDoesNotExist):  # See issue #509
+            self.scr.start()
+        # Check the script is not recreated as a side-effect
+        self.assertFalse(self.scr in ScriptDB.objects.get_all_scripts())
+
+    def test_deleted_script_is_invalid(self):
+        "Can deleted scripts be said to be valid?"
+        self.scr.delete()
+        self.assertFalse(self.scr.is_valid())  # assertRaises? See issue #509