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(define-library (csc testing)
(export
assert
assert-equal
assert-raises
test
test-main)
(import (scheme base)
(only (csc compare) diff)
(only (csc format)
printf
sprintf))
(begin
(define *all-tests-succeeded* #t)
(define (set-all-succeeded! val) (set! *all-tests-succeeded* val))
(define-record-type <test-handle>
(make-test-handle test-name)
test-handle?
(test-name test-name set-name!))
(define-record-type <test-error>
(make-test-error)
test-error?)
(define *test-handle* (make-test-handle "global"))
(define-syntax test
(syntax-rules ()
((test name body body* ...)
(begin
(set-name! *test-handle* (symbol->string 'name))
(printf "=== RUN {}\n" 'name)
(guard (e ((test-error? e)
(printf "--- FAIL: {}\n" 'name)
(set-all-succeeded! #f)))
body body* ...
(printf "--- PASS: {}\n" 'name))))))
(define (fatalf format-string . format-args)
(printf "{}: {}\n" (test-name *test-handle*) (apply sprintf format-string format-args))
(raise (make-test-error)))
(define-syntax assert
(syntax-rules ()
((assert expr)
(unless expr
(fatalf "(assert {}) failed." 'expr)))))
(define-syntax assert-equal
(syntax-rules ()
((assert-equal left right transformers ...)
(let* ((x left)
(y right)
(d (diff x y transformers ...)))
(unless (string=? "" d)
(fatalf "Fatal:\n {}\nis not equal to\n {}.\nleft is\n {}\nright is\n {}\ndiff (-left +right):\n{}" 'left 'right x y d))))
((assert-equal left right)
(assert-equal equal? left right))))
(define-syntax assert-raises
(syntax-rules ()
((assert-raises predicate body body* ...)
(assert
(guard (e ((predicate e) #t))
body body* ...
#f)))))
(define (test-main)
(if *all-tests-succeeded*
(printf "PASS\n")
(printf "FAIL\n")))))
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