Add a @spawn unit test

Tests the @spawn command and its variations.  The test is designed to
aslo check the properties of the spawned objects for some common/obvious
settings.

Test also adds a new prototypes file to be used with the Evennia unit
tester for any tests that require named prototypes.  The spawner test
requires testing named prototypes, so it is added in this change.

evennia/utils/test_prototypes.py

@@ -0,0 +1,20 @@
+"""
+test_prototypes
+
+This is meant to be used with Evennia unittest framework
+to provide some named prototypes for use with various tests
+(for example commands that accept named prototypes, not just
+prototype dictionaries)
+"""
+
+GOBLIN = {
+    "key" : "Goblin", \
+    "typeclass" : "DefaultCharacter", \
+    "desc" : "A goblin."
+}
+
+BALL = {
+    "key" : "Ball", \
+    "typeclass" : "DefaultObject", \
+    "desc" : "A ball."
+}

evennia/utils/test_resources.py

@@ -34,6 +34,8 @@ class EvenniaTest(TestCase):
         self.room1 = create.create_object(self.room_typeclass, key="Room", nohome=True)
         self.room1.db.desc = "room_desc"
         settings.DEFAULT_HOME = "#%i" % self.room1.id  # we must have a default home
+        # Set up fake prototype module for allowing tests to use named prototypes.
+        settings.PROTOTYPE_MODULES = "evennia.utils.test_prototypes"
         self.room2 = create.create_object(self.room_typeclass, key="Room2")
         self.exit = create.create_object(self.exit_typeclass, key='out', location=self.room1, destination=self.room2)
         self.obj1 = create.create_object(self.object_typeclass, key="Obj", location=self.room1, home=self.room1)