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; Copyright (c) 1993-2008 by Richard Kelsey and Jonathan Rees. See file COPYING.
; Support for writing and running test suites
(define-record-type test-suite :test-suite
(really-make-test-suite name test-cases)
test-suite?
(name test-suite-name)
(test-cases test-suite-cases set-test-suite-cases!))
(define-record-discloser :test-suite
(lambda (t)
(list 'test-suite
(test-suite-name t))))
(define-record-type compound-test-suite :compound-test-suite
(make-compound-test-suite name components)
compound-test-suite?
(name compound-test-suite-name)
(components compound-test-suite-components))
(define-record-discloser :compound-test-suite
(lambda (t)
(list 'compound-test-suite
(compound-test-suite-name t)
(compound-test-suite-components t))))
(define (make-test-suite name)
(really-make-test-suite name '()))
(define-syntax define-test-suite
(syntax-rules ()
((define-test-suite ?name)
(define ?name (make-test-suite '?name)))
((define-test-suite ?name (?comp0 ...))
(define ?name (make-compound-test-suite '?name (list ?comp0 ...))))))
(define (add-test-case! suite case)
(let ((same-name?
(lambda (a-case)
(eq? (test-case-name case) (test-case-name a-case)))))
(cond
((any same-name?
(test-suite-cases suite))
=> (lambda (duplicate)
(warn "duplicate test case, removing old one" duplicate)
(set-test-suite-cases! suite
(delete same-name? (test-suite-cases suite)))))))
(set-test-suite-cases! suite
(cons case (test-suite-cases suite))))
(define (zap-test-suite! suite)
(set-test-suite-cases! suite '()))
(define-record-type test-case :test-case
(make-test-case name suite thunk)
test-case?
(name test-case-name)
(suite test-case-suite)
(thunk test-case-thunk))
(define-record-discloser :test-case
(lambda (c)
(list 'test-case (test-case-name c))))
(define-syntax define-test-case
(syntax-rules ()
((define-test-case ?name ?suite ?body0 ?body1 ...)
(let ((suite ?suite))
(add-test-case! suite
(make-test-case '?name
suite
(lambda ()
?body0 ?body1 ...)))))))
(define-syntax define-test-cases
(syntax-rules ()
((define-test-cases ?suite
(?name ?body0 ?body1 ...) ...)
(begin
(define-test-case ?name ?suite ?body0 ?body1 ...) ...))))
(define-syntax check
(syntax-rules (=> not)
((check ?actual)
(check (and ?actual #t) => #t))
((check ?actual => ?expected)
(check ?actual (=> equal?) ?expected))
((check ?actual (=> ?equal?) ?expected)
(let ((expected ?expected)
(equal? ?equal?))
(guard
(c
(else
(register-failure!
(make-check-failure (fluid $test-case)
'?actual #f c '?expected expected equal?))))
(let ((actual ?actual))
(if (not (equal? actual expected))
(register-failure!
(make-check-failure (fluid $test-case)
'?actual actual #f '?expected expected equal?)))))))))
(define (always-true _)
#t)
(define-syntax check-exception
(syntax-rules (=>)
((check-exception ?actual)
(check-exception ?actual => always-true))
((check-exception ?actual => ?predicate)
(let ((predicate ?predicate))
(guard
(c
((not (predicate c))
(register-failure!
(make-check-exception-failure (fluid $test-case)
'?actual #f c predicate)))
(else (values)))
(let ((actual ?actual))
(register-failure!
(make-check-exception-failure (fluid $test-case)
'?actual actual #f predicate))))))))
; special case: inexact
(define (=within tolerance)
(lambda (z1 z2)
(< (magnitude (- z2 z1)) tolerance)))
(define $test-case (make-fluid #f))
(define $failures (make-fluid #f))
(define (register-failure! failure)
(let ((cell (fluid $failures)))
(cell-set! cell
(cons failure (cell-ref cell)))))
(define-record-type check-failure :check-failure
(make-check-failure test-case
actual-expr actual-val actual-condition expected-expr expected-val
equal?-proc)
check-failure?
(test-case check-failure-test-case)
(actual-expr check-failure-actual-expr)
(actual-val check-failure-actual-val)
;; may be #f
(actual-condition check-failure-actual-condition)
(expected-expr check-failure-expected-expr)
(expected-val check-failure-expected-val)
(equal?-proc check-failure-equal?-proc))
(define-record-discloser :check-failure
(lambda (f)
(list 'check-failure
(check-failure-test-case f)
(list 'actual
(check-failure-actual-expr f)
(or (check-failure-actual-condition f)
(check-failure-actual-val f)))
(list 'expected
(check-failure-expected-expr f)
(check-failure-expected-val f))
(check-failure-equal?-proc f))))
(define-record-type check-exception-failure :check-exception-failure
(make-check-exception-failure test-case
actual-expr actual-val actual-condition predicate)
check-exception-failure?
(test-case check-exception-failure-test-case)
(actual-expr check-exception-failure-actual-expr)
(actual-val check-exception-failure-actual-val)
;; may be #f
(actual-condition check-exception-failure-actual-condition)
(predicate check-exception-failure-predicate))
(define-record-discloser :check-exception-failure
(lambda (f)
(list 'check-exception-failure
(check-exception-failure-test-case f)
(list 'actual
(check-exception-failure-actual-expr f)
(or (check-exception-failure-actual-condition f)
(check-exception-failure-actual-val f)))
(check-exception-failure-predicate f))))
(define (run-test-suite suite)
(let ((p (current-error-port))
(cell (make-cell '())))
(let-fluid
$failures cell
(lambda ()
(let recur ((suite suite))
(display "[" p)
(cond
((test-suite? suite)
(display (test-suite-name suite) p)
(newline p)
(for-each (lambda (case)
(display " (" p)
(display (test-case-name case) p)
(let-fluid $test-case case
(test-case-thunk case))
(display ")" p)
(newline p))
(reverse (test-suite-cases suite))))
((compound-test-suite? suite)
(display (compound-test-suite-name suite) p)
(newline p)
(for-each recur (compound-test-suite-components suite))))
(display "]" p)
(newline p) (newline p))))
(let ((failures (reverse (cell-ref cell))))
(if (null? failures)
(begin
(display "ALL TESTS SUCCEDED" p)
(newline p))
(begin
(display "FAILURES:" p)
(newline p)
(for-each report-failure failures)))
failures)))
(define (failure-test-case f)
(cond
((check-failure? f)
(check-failure-test-case f))
((check-exception-failure? f)
(check-exception-failure-test-case f))))
(define (report-failure f)
(let ((p (current-error-port)))
(let* ((cas (failure-test-case f))
(suite (test-case-suite cas)))
(display "Test case " p)
(display (test-case-name cas) p)
(display " [" p)
(display (test-suite-name suite) p)
(display "] FAILED:" p)
(newline p)
(cond
((check-failure? f)
(display "From expression " p)
(write (check-failure-actual-expr f) p)
(display " EXPECTED value " p)
(display (check-failure-expected-val f) p)
(display " of " p)
(write (check-failure-expected-expr f) p)
(newline p)
(display "INSTEAD got " p)
(cond
((check-failure-actual-condition f)
=> (lambda (con)
(display "exception with condition:" p)
(display-condition con p)))
(else
(write (check-failure-actual-val f) p)
(newline p))))
((check-exception-failure? f)
(display "From expression " p)
(write (check-exception-failure-actual-expr f) p)
(display " EXPECTED exception" p)
(let ((pred (check-exception-failure-predicate f)))
(if (not (eq? always-true pred))
(begin
(display " with condition matching " p)
(write pred p))))
(newline p)
(display "INSTEAD got " p)
(cond
((check-exception-failure-actual-condition f)
=> (lambda (con)
(display "exception with condition:" p)
(display-condition con p)))
(else
(write (check-exception-failure-actual-val f) p)
(newline p)))))
(newline p))))
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