> Suppose I had a function like the following:
#############
def y_n(prompt="Answer yes or no"):
while True:
answer = raw_input(prompt)
if answer in ['y', 'Y', 'yes']:
print "You said yes!"
break
elif answer in ['n', 'N', 'no']:
print "You said no!"
break
else:
print "%s is an invalid answer."%answer
################
> How could I go about to write an automated test for it?
Create a data file with all of the inputs you need and use input
redirection to run it. Assuming its called y_n.py:
$ python y_n.py <y_n.in > y_n.out
This is the easiest way of testing interactive programs.
This has limitations for unit testing if you have more
than one function per module however, in that case
you need to write a driver module that imports yours
and takes as a first input the function you want to test...
In Python the driver can sit inside the
if __name__ == __main__ stanza
Alan G
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