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36 lines
964 B
Text
36 lines
964 B
Text
(defmodule unit-error-monad-tests
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(export all)
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(import
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(from lfeunit-util
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(check-failed-assert 2)
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(check-wrong-assert-exception 2))))
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(include-lib "deps/lfeunit/include/lfeunit-macros.lfe")
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(include-lib "include/monads.lfe")
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(include-lib "include/monad-tests.lfe")
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(test-monad 'error-monad)
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(deftest return-ok
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(is-equal 'ok
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(return 'error-monad 'ok)))
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(deftest return-value
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(is-equal #(ok 123)
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(return 'error-monad 123)))
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(deftest fail-with-reason
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(is-equal #(error reason)
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(fail 'error-monad 'reason)))
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(deftest fail-short-circuits-value
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(is-equal (fail 'error-monad 'something-bad)
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(>> 'error-monad
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(fail 'error-monad 'something-bad)
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(return 'error-monad 123))))
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(deftest fail-short-circuits-error
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(is-equal #(error something-bad)
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(>> 'error-monad
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(fail 'error-monad 'something-bad)
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(throw 'error))))
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