Add make_admin_context to Magnum context

make_admin_context will return a admin context which can be used to fake
a context which will be use for periodic task.

Partial-Implements: blueprint add-periodic-task
Co-Authored-By: ShaoHe Feng <shaohe.feng@intel.com>
Change-Id: I92ff05e6e40ea8bd0c08ae279b70ef5f1a7e70be

magnum/common/context.py

@@ -75,3 +75,15 @@ class RequestContext(context.RequestContext):
 
 def make_context(*args, **kwargs):
     return RequestContext(*args, **kwargs)
+
+
+def make_admin_context(show_deleted=False):
+    """Create an administrator context.
+
+    :param show_deleted: if True, will show deleted items when query db
+    """
+    context = RequestContext(user_id=None,
+                             project=None,
+                             is_admin=True,
+                             show_deleted=show_deleted)
+    return context

magnum/tests/unit/common/test_context.py

@@ -74,3 +74,7 @@ class ContextTestCase(base.TestCase):
         self.assertEqual(ctx.request_id, ctx2.request_id)
         self.assertEqual(ctx.trust_id, ctx2.trust_id)
         self.assertEqual(ctx.auth_token_info, ctx2.auth_token_info)
+
+    def test_request_context_sets_is_admin(self):
+        ctxt = magnum_context.make_admin_context()
+        self.assertEqual(ctxt.is_admin, True)