[gnome-shell] tests: Fix environment

[Florian Müllner <fmuellner src gnome org>]

commit b33ebb450a693137c0f8eb859d2c244b1320709b
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Oct 3 04:16:07 2010 +0200

    tests: Fix environment
    
    Environment.init() uses Shell.Global, which is not accessible outside
    the mutter process; allowing to run the function when window.global is
    undefined fixes the environment for tests.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=631091

 js/ui/environment.js |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/environment.js b/js/ui/environment.js
index 6bab830..82ecea1 100644
--- a/js/ui/environment.js
+++ b/js/ui/environment.js
@@ -83,6 +83,9 @@ function init() {
         return St.describe_actor(this);
     };
 
+    if (window.global === undefined) // test environment
+        return;
+
     _blockMethod('Clutter.Event.get_state', 'Shell.get_event_state',
                  'gjs\'s handling of Clutter.ModifierType is broken. See bug 597292.');
     _blockMethod('Gdk.Display.get_device_state', 'global.get_pointer',