def test_print_time(self):
timer = Timer()
# Checks variable date components and constant string output.
substrings = [
'Completed ', 'It took:', 'seconds', '=====', '.', str(datetime.now().year), str(datetime.now().month),
str(datetime.now().day)
]
saved_stdout = sys.stdout
try:
out = StringIO()
sys.stdout = out
timer.print_time()
output = out.getvalue()
for substring in substrings:
self.assertTrue(substring in output, msg=substring)
finally:
sys.stdout = saved_stdout
