2d4f3e2ac9
The layer is now redundant, since everything left in "pkgs" is in the "racket-pkgs" category.
22 lines
551 B
Racket
22 lines
551 B
Racket
#lang racket
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(require rackunit rackunit/text-ui "2.rkt")
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(define s0 (initialize (flat-contract integer?) =))
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(define s2 (push (push s0 2) 1))
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(run-tests
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(test-suite
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"stack"
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(test-true
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"empty"
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(is-empty? (initialize (flat-contract integer?) =)))
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(test-true "push" (stack? s2))
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(test-true
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"push exn"
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(with-handlers ([exn:fail:contract? (lambda _ #t)])
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(push (initialize (flat-contract integer?)) 'a)
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#f))
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(test-true "pop" (stack? (pop s2)))
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(test-equal? "top" (top s2) 1)
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(test-equal? "toppop" (top (pop s2)) 2)))
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