Zhongyue Luo 795e731f9b Utilize assertIsInstance
Using assertTrue and the 'isinstance' function to test
if an object is in an instance of some class is too python2.4.
Our unit testing framework supports assertIsInstance which was created
for these types of tests. Let's use assertIsInstance for these tests.

Fixes bug #1230028

Change-Id: Ia03c9f19a1c5e2aef3a6fe530515bd26339a7975
2013-10-03 23:02:23 +00:00
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