Merge pull request #1691 from Henddher/bug_1499

Bug 1499: [READY FOR REVIEW AND MERGE] No way to clear object descs without resulting to `@py`

evennia/commands/default/building.py

@@ -612,12 +612,12 @@ class CmdDesc(COMMAND_DEFAULT_CLASS):
             self.edit_handler()
             return
 
-        if self.rhs:
+        if '=' in self.args:
             # We have an =
             obj = caller.search(self.lhs)
             if not obj:
                 return
-            desc = self.rhs
+            desc = self.rhs or ''
         else:
             obj = caller.location or self.msg("|rYou can't describe oblivion.|n")
             if not obj:

evennia/commands/default/tests.py

@@ -315,6 +315,24 @@ class TestBuilding(CommandTest):
     def test_desc(self):
         self.call(building.CmdDesc(), "Obj2=TestDesc", "The description was set on Obj2(#5).")
 
+    def test_empty_desc(self):
+        """
+        empty desc sets desc as ''
+        """
+        o2d = self.obj2.db.desc
+        r1d = self.room1.db.desc
+        self.call(building.CmdDesc(), "Obj2=", "The description was set on Obj2(#5).")
+        assert self.obj2.db.desc == '' and self.obj2.db.desc != o2d
+        assert self.room1.db.desc == r1d
+
+    def test_desc_default_to_room(self):
+        """no rhs changes room's desc"""
+        o2d = self.obj2.db.desc
+        r1d = self.room1.db.desc
+        self.call(building.CmdDesc(), "Obj2", "The description was set on Room(#1).")
+        assert self.obj2.db.desc == o2d
+        assert self.room1.db.desc == 'Obj2' and self.room1.db.desc != r1d
+
     def test_wipe(self):
         confirm = building.CmdDestroy.confirm
         building.CmdDestroy.confirm = False