2 SchemeUnit Integration

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2 SchemeUnit Integration

(require (planet cce/fasttest:3:9/schemeunit))

This module provides the test-random macro for generating SchemeUnit test suites that generate and record random inputs.

(test-random opt ...

([lhs rhs bind-opt ...]

...)

body ...+)

opt	=	#:name name
	\|	#:repeat repeat
	\|	#:limit limit

bind-opt	=	#:where bind-where
	\|	#:limit bind-limit

The test-random form constructs a SchemeUnit test-suite that conducts multiple trials of body ...+. During a trial, each variable lhs is bound to the value of the corresponding expression rhs. Bindings proceed left-to-right with let*-scope, and each rhs is re-run to permit new random values.

The suite conducts repeat trials (default 100).

After each rhs is run, its corresponding where expression (if any) is run; if where evaluates to #t, the rhs is re-run. Each rhs is run at most the minimum of limit and the corresponding bind-limit, defaulting to 10000.

Examples:
  > (require (planet schematics/schemeunit:2:10/test)
             (planet schematics/schemeunit:2:10/text-ui))
  > (random-seed 1)
  > (test/text-ui
     (test-random
      ([x (random-integer)]
       [y (random-integer)])
      (check-pred integer? (+ x y))))
  100 success(es) 0 failure(s) 0 error(s) 100 test(s) run
  0
  > (random-seed 1)
  > (test/text-ui
     (test-random #:name "test w/ options"
                  #:limit 4
                  #:repeat 5
      ([x (random-integer)]
       [y (random-integer)])
      (check-pred positive? (+ x y))))

  test w/ options > 1
  1 has a FAILURE
  x: -165
  y: 7
  name: check-pred
  location: eval:119:0
  params:
  #<procedure:positive?>
  -158

  test w/ options > 3
  3 has a FAILURE
  x: -688
  y: 37
  name: check-pred
  location: eval:119:0
  params:
  #<procedure:positive?>
  -651

  test w/ options > 5
  5 has an ERROR
  test w/ options: Out of random values.  Failed attempts include:



   === context ===
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/result.ss:70:5
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/../generic/foldts.ss:57:6: loop
  test/text-ui
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/private/more-scheme.rkt:149:2: call-with-break-parameterization
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/sandbox.rkt:727:9: loop


  2 success(es) 2 failure(s) 1 error(s) 5 test(s) run
  3
  > (random-seed 1)
  > (test/text-ui
     (test-random #:name "test w/ bind options"
                  #:repeat 4
      ([x (random-integer)
          #:where (odd? x)
          #:limit 4]
       [y (random-integer)
          #:where (odd? y)
          #:limit 4])
      (check-pred even? (+ x y))))

  test w/ bind options > 3
  3 has an ERROR
  test w/ bind options: Out of random values.  See trial #4 for list of attempts.

   === context ===
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/result.ss:70:5
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/../generic/foldts.ss:57:6: loop
  test/text-ui
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/private/more-scheme.rkt:149:2: call-with-break-parameterization
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/sandbox.rkt:727:9: loop



  test w/ bind options > 4
  4 has an ERROR
  test w/ bind options: Out of random values.  Failed attempts include:

  x = -123
  y = 2716

  x = -123
  y = 886

  x = -688


   === context ===
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/result.ss:70:5
  /Users/cce/Desktop/Racket v5.0.99.900/add-on/planet/5.0.99.900/cache/schematics/schemeunit.plt/2/12/plt/../generic/foldts.ss:57:6: loop
  test/text-ui
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/private/more-scheme.rkt:149:2: call-with-break-parameterization
  /Users/cce/Desktop/Racket v5.0.99.900/collects/racket/sandbox.rkt:727:9: loop


  2 success(es) 0 failure(s) 2 error(s) 4 test(s) run
  2

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