Seems that people prefer this to be CPPUNIT_ASSERT() instead of
assert().

My first thinking was that there is a slight difference in meaning;
that assert() checks that the code (or, in this case, data) in the
test *itself* is as expected while CPPUNIT_ASSERT() checks that the
functionality *somewhere else* works as expected. But whatever.

Change-Id: I93f7f8cf2b3aac9e8fc35baf2dcbad1a4003773f
(cherry picked from commit 2438f18b)