From bc4c3538cc3174534d305786777ef6d91e1af896 2015-01-20 00:17:04
From: Min RK <benjaminrk@gmail.com>
Date: 2015-01-20 00:17:04
Subject: [PATCH] test that custom description doesn't change kwarg
---

diff --git a/IPython/html/widgets/tests/test_interaction.py b/IPython/html/widgets/tests/test_interaction.py
index 023edcb..774b25c 100644
--- a/IPython/html/widgets/tests/test_interaction.py
+++ b/IPython/html/widgets/tests/test_interaction.py
@@ -489,13 +489,20 @@ def test_default_description():
     )
 
 def test_custom_description():
-    c = interactive(f, b=widgets.Text(value='text', description='foo'))
+    d = {}
+    def record_kwargs(**kwargs):
+        d.clear()
+        d.update(kwargs)
+    
+    c = interactive(record_kwargs, b=widgets.Text(value='text', description='foo'))
     w = c.children[0]
     check_widget(w,
         cls=widgets.Text,
         value='text',
         description='foo',
     )
+    w.value = 'different text'
+    nt.assert_equal(d, {'b': 'different text'})
 
 def test_interact_manual_button():
     c = interactive(f, __manual=True)