41 lines
1.5 KiB
Racket
41 lines
1.5 KiB
Racket
#lang scheme
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(require unstable/list)
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(require tests/eli-tester)
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(test
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(remf positive? '()) => '()
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(remf positive? '(1 -2 3 4 -5)) => '(-2 3 4 -5)
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(remf even? '(1 -2 3 4 -5)) => '(1 3 4 -5)
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(remf (λ (x) #f) '(1 -2 3 4 -5)) => '(1 -2 3 4 -5))
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(require rackunit rackunit/text-ui)
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(run-tests
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(test-suite "unstable/list"
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(test-suite "map2"
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(test-case "numerator and denominator"
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(let*-values ([(ns ds)
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(map2
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(lambda (r)
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(values (numerator r) (denominator r)))
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(list 1/2 3/4 5/6))])
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(check-equal? (list ns ds) (list '(1 3 5) '(2 4 6))))))
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(test-suite "map/values"
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(test-case "complex numerator and denominator"
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(let*-values ([(rns rds ins ids)
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(map/values
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4
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(lambda (c)
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(values (numerator (real-part c))
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(denominator (real-part c))
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(numerator (imag-part c))
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(denominator (imag-part c))))
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(list 1/2+3/4i 5/6+7/8i))])
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(check-equal? (list rns rds ins ids)
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(list '(1 5) '(2 6) '(3 7) '(4 8)))))
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(test-case "multiple lists"
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(let*-values ([(as bs cs)
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(map/values 3 values '(1 2 3) '(4 5 6) '(7 8 9))])
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(check-equal? as '(1 2 3))
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(check-equal? bs '(4 5 6))
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(check-equal? cs '(7 8 9)))))))
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