def testPrintsDiff(self):
out = compat.StringIO()
with self.assertRaises(AssertionError):
th.assertJsonEqual([], [1], out)
lines = out.getvalue().splitlines()
# diff output includes \n\n, which becomes empty entry from splitlines
# get rid of them.
lines = list(filter(None, lines))
th.assertStartsWith(lines[0], '--- calculated')
th.assertStartsWith(lines[1], '+++ ideal')
def testStarts(self):
s = 'abcd'
th.assertStartsWith(s, 'ab')
with self.assertRaises(AssertionError):
th.assertStartsWith(s, 'b')
