In article <[EMAIL PROTECTED]>,
Ben Finney <[EMAIL PROTECTED]> wrote:
> Then what you're really testing is the interactions of the "push the
> button" function with its external interface: you're asserting that
> the "push the red button" function actually uses the result from "pick
> a random city" as its target.
No, that's not what I'm testing at all. I want to test that the cities
really do get picked randomly. Notice the implementation I gave:
def _pickCity():
cities = ['New York', 'Moscow', 'Tokyo', 'Beijing', 'Mumbai']
thePoorSchmucks = random.choice(cities)
return 'New York'
There's a deliberate bug in there, i.e. it always returns 'New York', which
(as a resident of that city), I would find distressing in such an
application. If you plugged in some other function for _pickCity(), you'd
never discover that bug until it was too late.
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