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quickcheck-text generates Text values containing invalid Unicode characters #6

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williamyaoh opened this issue Mar 12, 2019 · 0 comments

williamyaoh commented Mar 12, 2019

Specifically, U+FFFE and U+FFFF, which are invalid.

To replicate:

λ> :seti -XTypeApplications
λ> import Data.Text as T
λ> :m + Data.Text.Arbitrary Test.QuickCheck
λ> invalid1 <- generate $ arbitrary @Text `suchThat` (not . T.null . T.filter (== '\65535'))
λ> invalid2 <- generate $ arbitrary @Text `suchThat` (not . T.null . T.filter (== '\65534'))

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