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(import (scheme base)
(only (csc testing)
define-test
errorf)
(csc sort))
(define-test (test-sort t)
(define-record-type <test-case>
(test-case desc xs want)
test-case?
(desc desc)
(xs xs)
(want want))
(let ((tests (list
(test-case
"ten elem"
'(9 4 5 100 3 2 4 6 0 -2)
'(-2 0 2 3 4 4 5 6 9 100))
(test-case
"empty"
'()
'())
(test-case
"singleton"
'(1)
'(1))
(test-case
"two"
'(2 1)
'(1 2))
(test-case
"reversed"
'(20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1)
'(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20))
(test-case
"already sorted"
'(1 2 3 4 5 6 7 8 9 10)
'(1 2 3 4 5 6 7 8 9 10)))))
(for-each
(lambda (tc)
(let ((got (sort (lambda (x1 x2) (< x1 x2)) (xs tc))))
(unless (equal? got (want tc))
(errorf t "(sort {}) = {}, want {}." (xs tc) got (want tc)))))
tests)))
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