On 13.04.2011 02:07, Antoine Pitrou wrote:
> On Tue, 12 Apr 2011 19:50:34 -0400
> Tres Seaver <[email protected]> wrote:
>> Trying to accelerate existing code which doesn't have the coverage is
>> insane: how can you know that the accelerator doesn't subtly change the
>> semantics without tests?
>
> Well, why do you think tests guarantee that the semantics are the same?
> Tests are not a magic bullet. "Covering" a code path doesn't ensure
> that every possible behaviour is accounted for.
def foo(a, b):
if condition(a):
bar = b
do_something_with(bar)
This has 100% coverage if "condition" is usually true :)
Georg
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