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simple-tests

This module exports some macros and procedures which help in debugging and testing. Most of the code is a straight-forward port of Peter Seibel's test suite in "Practical Common Lisp" to Chicken Scheme.

Common

simple-tests

[procedure] (simple-tests [sym])

documentation-procedure; returns the list of exported symbols if called with no symbol, otherwise the signature of that exported symbol sym.

and?

[procedure] (and? xpr . xprs)

non-short-circuated and, which executes all side-effects.

writeln

[procedure] (writeln xpr . xprs)

like print, but writes expressions separated by a space in one line.

pe

[procedure] (pe macro-code)

pretty-prints expanded macro-code.

xpr:val

[syntax] (xpr:val xpr ...)

print each xpr quoted in a headline and pretty-print its computed value.

ppp

[syntax] (ppp xpr ...)

print each xpr quoted in a headline and pretty-print its computed value, alias to xpr:val

ppp*

[syntax] (ppp* {xpr val} ...)

print each xpr quoted in a headline, and pretty-print xpr's computed as well as its expected value.

xpr:val*

[syntax] (xpr:val* {xpr val} ...)

alias to ppp*

Old interface

compound-test

[syntax] (compound-test (name) test ...)

This is the obligatory wrapper around each individual test predicate. Runs each test (usually created by define-test) in sequence and prints the results of each as well as a combined result. Exits with 0 or 1 depending on success or failure.

define-test

[syntax] (define-test (name . parameters) form . forms)

creates a test predicate, (name . parameters), to be called within compound-test. That predicate will test and report the results of all of its form arguments.

*locations*

global dynamic variable controlling location of possibly nested tests.

*failures*

global variable collecting failure information

New interface

==

[procedure] (==)
[procedure] (== x)
[procedure] (== type? type-equal?)

generic procedure. The first resets the local database, the second returns the curried equality operator, corresponding to x, and the third adds a new pair to the local database. Using (== x) for comparison, you needn't supply a special comparison operator, (== x) will do it for you.

define-checks

[syntax] (define-checks (name? verbose? {arg val} ...) {xpr expected} ...)

defines a unary predicate, name?, with argument verbose?, which compares all pairs {xpr expected} and prints a list of failures, if verbose? is #t or not given. Otherwise simply returns #t or #f, depending on the comparison of the pairs' items. If the verbose? argument in the generated predicate is missing, it's #t, so the output is verbose. Inside another check-predicate, it's usually #f, cf. arithmetic? below.

Comparison is done by the generic procedure ==. {arg val} ... is translated into a let, supplying values to be used in test pairs.

check-all

[syntax] (check-all name check ...)

tests each check in sequence and names it.

Examples

 

(import simple-tests)

(define-test (+?)
  (= (+ 1 2) 3)
  (= (+ 1 2 3) 6))

(define-test (*?)
  (= (* 1 2) 2)
  (= (* 1 2 3) 6))

(define-test (arithmetic?)
  (+?)
  (*?))

(compound-test (simple-tests)
  (arithmetic?))

or, ALTERNATIVELY

(define-checks (+? verbose?)
  (+ 1 2) 3
  (+ 1 2 3) 6)

(define-checks (*? verbose?)
  (* 1 2) 2
  (* 1 2 3) 6)

(define-checks (arithmetic? verbose?)
  (+? #f) #t
  (*? #f) #t)

(check-all SIMPLE (+?) (*?) (arithmetic?))

Last update

Mar 17, 2020

Author

Juergen Lorenz

License

 
Copyright (c) 2013-2020, Juergen Lorenz
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Version History
2.0.3
bugfix: protect state changing functions
2.0.1
test-predicates without verbose? argument are verbose by default
2.0
added a second testing interface
1.1
ppp* added
1.0
port with modifications from chicken-4, version 2.6, to chicken-5