Setup basic Runtime with properties and platform.

recipe_engine/unittests/loader_test.py

Index: recipe_engine/unittests/loader_test.py
diff --git a/recipe_engine/unittests/loader_test.py b/recipe_engine/unittests/loader_test.py
index 15f3585874ac8cdef6e45319e76f87c251aadfd0..b43391e4258dbf29b0c034521a0c6bdfed0f6784 100755
--- a/recipe_engine/unittests/loader_test.py
+++ b/recipe_engine/unittests/loader_test.py
@@ -9,7 +9,7 @@ import unittest
 
 import test_env
 
-from recipe_engine import loader, recipe_api, config
+from recipe_engine import config, loader, recipe_api, run
 import mock
 
 
@@ -33,7 +33,8 @@ class TestRecipeScript(unittest.TestCase):
     }, 'test_script')
     loader.invoke_with_properties = lambda *args, **kwargs: FakeReturn()
 
-    self.assertEqual(mocked_return, script.run(None, None))
+    rt = run.Runtime({})
+    self.assertEqual(mocked_return, script.run(None, rt))
 
 def make_prop(**kwargs):
   name = kwargs.pop('name', "dumb_name")