Malcolm Ryan wrote: > On 10/05/2007, at 8:12 PM, Joachim Schimpf (Independent Contractor) wrote: > >> Malcolm Ryan wrote: >>> Does anyone have experience with using unit testing tools for prolog? >> >> We use the ECLiPSe library test_util >> http://www.eclipse-clp.org/doc/bips/lib/test_util/index.html > > How would you test something which is supposed to backtrack and give > multiple solutions, eg member(X, [a,b,c])? The obvious way would be to use findall/3, i.e. findall(X,member(X,[a,b,c]),Sols) should_give Sols==[a,b,c]. If variable identity matters, you need bagof/3, e.g. bagof(X, member(X,[A,B,C]), Sols) should_give Sols==[A,B,C]. I don't think having special support for nondeterministic goals would simplify things much, am I wrong? > Oh, and why isn't there a should_succeed (== should_give true)? Occam's razor - it only saves two keystrokes, but we have to document a whole new predicate :-) -- JoachimReceived on Tue Jun 05 2007 - 22:53:29 CEST
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