RosettaCodeData/Task/Assertions/Picat/assertions.picat

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go =>
%
% Test predicates
%
S = "ablewasiereisawelba",
assert("test1",$is_palindrome(S)),
assert_failure("test2",$not is_palindrome(S)),
assert("test3",$member(1,1..10)),
assert_failure("test4",$member(1,1..10)), % bad test
nl,
%
% Test functions
%
assert("test5",$2+2,4),
assert_failure("test6",$2+2, 5),
assert("test7",$to_lowercase("PICAT"),"picat"),
assert_failure("test8",$sort([3,2,1]),[1,3,2]),
nl.
is_palindrome(S) =>
S == S.reverse().
% Test a predicate with call/1
assert(Name, A) =>
println(Name ++ ": " ++ cond(call(A), "ok", "not ok")).
assert_failure(Name, A) =>
println(Name ++ ": " ++ cond(not call(A), "ok", "not ok")).
% Test a function with apply/1
assert(Name, A, Expected) =>
println(Name ++ ": " ++ cond(apply(A) == Expected, "ok", "not ok")).
assert_failure(Name, A, Expected) =>
println(Name ++ ": " ++ cond(apply(A) != Expected , "ok", "not ok")).