#lang scheme/base
(require srfi/26/cut
(file "generator.ss")
(file "test-base.ss"))
(define generator-tests
(test-suite "generator.ss"
(test-case "list->generator works when no default specified"
(let ([gen (list->generator (list 1 2 3))])
(check-equal? (gen) 1 "check 1")
(check-equal? (gen) 2 "check 2")
(check-equal? (gen) 3 "check 3")
(check-pred generator-end? (gen) "check 4")
(check-pred generator-end? (gen) "check 5")))
(test-case "generator->list works as expected"
(check-equal? (generator->list (list->generator (list 1 2 3)))
(list 1 2 3))
(check-equal? (generator->list (list->generator (list 1 2 3 generator-end 4 5)))
(list 1 2 3)))
(test-case "generator-fold works as expected"
(check-equal? (generator-fold
cons
null
(list->generator (list 1 2 3)))
(list 3 2 1))
(check-equal? (generator-fold
(lambda (a b accum)
(cons (+ a b) accum))
null
(list->generator (list 1 2 3 4 5))
(list->generator (list 2 4 6 8 10)))
(list 15 12 9 6 3))
(check-equal? (generator-fold
(lambda (a b accum)
(cons (+ a b) accum))
null
(list->generator (list 1 2 3 4 5))
(list->generator (list 2 4 6 generator-end 10)))
(list 9 6 3)))
(test-case "generator-map works as expected"
(check-equal? (generator->list
(generator-map
even?
(list->generator (list 1 2 3 4 5))))
(list #f #t #f #t #f))
(check-equal? (generator->list
(generator-map
+
(list->generator (list 1 2 3 4 5))
(list->generator (list 1 3 5 7 9))))
(list 2 5 8 11 14)))
(test-case "generator-fold-map works as expected"
(check-equal? (generator->list
(generator-fold-map
+
0
(list->generator (list 1 2 3 4 5))))
(list 1 3 6 10 15))
(check-equal? (generator->list
(generator-fold-map
+
0
(list->generator (list 1 2 3 4 5))
(list->generator (list 1 3 5 7 9))))
(list 2 7 15 26 40)))
(test-case "generator-filter works as expected"
(check-equal? (generator->list
(generator-filter
even?
(list->generator (list 1 2 3 4 5))))
(list 2 4)))
(test-case "generator-filter-map works as expected"
(check-equal? (generator->list
(generator-filter-map
(lambda (a)
(if (even? a)
(* 2 a)
#f))
(list->generator (list 1 2 3 4 5))))
(list 4 8)))
(test-case "generator-remove-duplicates works as expected"
(check-equal? (generator->list
(generator-remove-duplicates
(list->generator (list 1 2 2 3 3 3 4 4 5))))
(list 1 2 3 4 5)))
(test-case "generator-for-each works as expected"
(check-equal? (let ([accum null])
(generator-for-each
(lambda (a)
(set! accum (cons a accum)))
(list->generator (list 1 2 3 4 5)))
accum)
(list 5 4 3 2 1))
(check-equal? (let ([accum null])
(generator-for-each
(lambda (a b)
(set! accum (cons (+ a b) accum)))
(list->generator (list 1 2 3 4 5))
(list->generator (list 2 4 6 8 10)))
accum)
(list 15 12 9 6 3)))
(test-case "generator-project works as expected"
(let ([generate (generator-project (list #t #t #f #f)
(list->generator (list (list 0 0 0 0)
(list 0 0 0 1)
(list 0 0 1 0)
(list 0 0 1 1)
(list 0 1 0 0)
(list 0 1 0 1)
(list 0 1 1 0)
(list 0 1 1 1))))])
(check-equal? (generate)
(list 0 0 (list (list 0 0)
(list 0 1)
(list 1 0)
(list 1 1)))
"check 1")
(check-equal? (generate)
(list 0 1 (list (list 0 0)
(list 0 1)
(list 1 0)
(list 1 1)))
"check 2")
(check-pred generator-end?
(generate)
"check 3")
(check-pred generator-end?
(generate)
"check 4")))
(test-case "generator-project with mask completely #t"
(let ([generate (generator-project (list #t #t #t #t)
(list->generator (list (list 0 0 0 0)
(list 0 0 0 1)
(list 0 0 1 0)
(list 0 0 1 1)
(list 0 1 0 0)
(list 0 1 0 1)
(list 0 1 1 0)
(list 0 1 1 1))))])
(check-equal? (generate) (list 0 0 0 0 (list (list))))
(check-equal? (generate) (list 0 0 0 1 (list (list))))
(check-equal? (generate) (list 0 0 1 0 (list (list))))
(check-equal? (generate) (list 0 0 1 1 (list (list))))
(check-equal? (generate) (list 0 1 0 0 (list (list))))
(check-equal? (generate) (list 0 1 0 1 (list (list))))
(check-equal? (generate) (list 0 1 1 0 (list (list))))
(check-equal? (generate) (list 0 1 1 1 (list (list))))
(check-pred generator-end? (generate))))
(test-case "generator-project with mask completely #f"
(let ([generate (generator-project (list #f #f #f #f)
(list->generator (list (list 0 0 0 0)
(list 0 0 0 1)
(list 0 0 1 0)
(list 0 0 1 1)
(list 0 1 0 0)
(list 0 1 0 1)
(list 0 1 1 0)
(list 0 1 1 1))))])
(check-equal? (generate) (list (list (list 0 0 0 0)
(list 0 0 0 1)
(list 0 0 1 0)
(list 0 0 1 1)
(list 0 1 0 0)
(list 0 1 0 1)
(list 0 1 1 0)
(list 0 1 1 1))))
(check-pred generator-end? (generate))))
(test-case "generator-project passes non-list items straight through"
(let ([generate (generator-project (list #t #t #f #f)
(list->generator (list (list 0 0 0 0)
(list 0 0 0 1)
123
(list 0 1 0 0)
(list 0 1 0 1)
456)))])
(check-equal? (generate) (list 0 0 (list (list 0 0) (list 0 1))) "check 1")
(check-equal? (generate) 123)
(check-equal? (generate) (list 0 1 (list (list 0 0) (list 0 1))) "check 2")
(check-equal? (generate) 456)
(check-pred generator-end? (generate))))
(test-case "generator-project passes non-list items straight through"
(let ([generate (generator-project (list #t #t #f #f)
(list->generator (list (list 0 0 0 0)
(list 0 0 0 1)
123
(list 0 1 0 0)
(list 0 1 0 1)
456)))])
(check-equal? (generate) (list 0 0 (list (list 0 0) (list 0 1))) "check 1")
(check-equal? (generate) 123)
(check-equal? (generate) (list 0 1 (list (list 0 0) (list 0 1))) "check 2")
(check-equal? (generate) 456)
(check-pred generator-end? (generate))))
(test-case "generator-project uses eq? by default"
(let ([generate (generator-project (list #t #t #f #f)
(list->generator (list (list "0" "0" "0" "0")
(list "0" "0" "0" "1")
123
(list "0" "1" "0" "0")
(list "0" "1" "0" "1")
456)))])
(check-equal? (generate) (list "0" "0" (list (list "0" "0"))) "check 1")
(check-equal? (generate) (list "0" "0" (list (list "0" "1"))) "check 2")
(check-equal? (generate) 123 "check 3")
(check-equal? (generate) (list "0" "1" (list (list "0" "0"))) "check 4")
(check-equal? (generate) (list "0" "1" (list (list "0" "1"))) "check 5")
(check-equal? (generate) 456 "check 6")
(check-pred generator-end? (generate) "check 7")))
(test-case "generator-project can be configured to use equal? instead of eq?"
(let ([generate (generator-project (list #t #t #f #f)
(list->generator (list (list "0" "0" "0" "0")
(list "0" "0" "0" "1")
123
(list "0" "1" "0" "0")
(list "0" "1" "0" "1")
456))
equal?)])
(check-equal? (generate) (list "0" "0" (list (list "0" "0") (list "0" "1"))) "check 1")
(check-equal? (generate) 123 "check 2")
(check-equal? (generate) (list "0" "1" (list (list "0" "0") (list "0" "1"))) "check 3")
(check-equal? (generate) 456 "check 4")
(check-pred generator-end? (generate) "check 5")))))
(provide generator-tests)
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