On 08/12/2006, at 12:40 AM, Brett Payne-Rhodes wrote:
> Can anyone supply a simple example of an 'acceptable' use of
> evaluate()?
>
> Cheers,
>
> Brett
> B)
I've written a very simple (one cfc) unit testing framework that some
of our clients have been beta testing over the last few months.
One of the things that irked me about existing ColdFusion unit
testing packages was that they had a profusion of assert() functions
e.g. assertGreaterThan, assertLessThan etc - just like JUnit. The
only reason to have so many assert functions was so that the correct
message could be printed when the assert failed.
My reckoning was that in a language with an evaluate() function we
should be able to make a single assert that could print the entire
expression that failed, and even better, print out the values of the
individual elements of the expression being asserted, e.g. if assert
("a(b) or c[d]") failed we could print out the values of "a(b) or c
[d]", "a(b)", "c[d]", "b" and "d" by breaking up the original string
and calling evaluate for each one.
So I use evaluate to make this assert function work. It's only used
in a testing context. Otherwise (as anyone attending a CF course
with me will attest) I avoid evaluate() and isDefined() wherever
possible.
Cheers,
Robin
PS: Mail me off list if you want to get a copy of the framework.
I'm not going to generally release it until it's had a bit more testing.
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Robin Hilliard
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