rot13-0.2.0.0 test suite build failure

[DanBurton]

As seen on stackage server:

Preprocessing test suite 'spec' for rot13-0.2.0.0...
[1 of 1] Compiling Main             ( test/Spec.hs, dist/build/spec/spec-tmp/Main.o )

test/Spec.hs:20:7: error:
    • Ambiguous type variable ‘c0’ arising from a use of ‘property’
      prevents the constraint ‘(Arbitrary c0)’ from being solved.
      Probable fix: use a type annotation to specify what ‘c0’ should be.
      These potential instances exist:
        instance [safe] (Arbitrary a, Arbitrary b) =>
                        Arbitrary (Either a b)
          -- Defined in ‘Test.QuickCheck.Arbitrary’
        instance [safe] Arbitrary Ordering
          -- Defined in ‘Test.QuickCheck.Arbitrary’
        instance [safe] Arbitrary Integer
          -- Defined in ‘Test.QuickCheck.Arbitrary’
        ...plus 19 others
        ...plus 32 instances involving out-of-scope types
        (use -fprint-potential-instances to see them all)
    • In the second argument of ‘($)’, namely
        ‘property $ \ s -> s == (rot13 . rot13) s’
      In a stmt of a 'do' block:
        it "is reversible" $ property $ \ s -> s == (rot13 . rot13) s
      In the second argument of ‘($)’, namely
        ‘do { it "correctly ciphers the alphabet"
              $ do { rot13 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
                     `shouldBe`
                       "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm" };
              it "is reversible" $ property $ \ s -> s == (rot13 . rot13) s }’


test/Spec.hs:20:24: error:
    • Ambiguous type variable ‘c0’ arising from a use of ‘==’
      prevents the constraint ‘(Eq c0)’ from being solved.
      Relevant bindings include s :: c0 (bound at test/Spec.hs:20:19)
      Probable fix: use a type annotation to specify what ‘c0’ should be.
      These potential instances exist:
        instance (Eq b, Eq a) => Eq (Either a b)
          -- Defined in ‘Data.Either’
        instance Eq Ordering -- Defined in ‘ghc-prim-0.5.0.0:GHC.Classes’
        instance Eq Integer
          -- Defined in ‘integer-gmp-1.0.0.1:GHC.Integer.Type’
        ...plus 23 others
        ...plus 162 instances involving out-of-scope types
        (use -fprint-potential-instances to see them all)
    • In the expression: s == (rot13 . rot13) s
      In the second argument of ‘($)’, namely
        ‘\ s -> s == (rot13 . rot13) s’
      In the second argument of ‘($)’, namely
        ‘property $ \ s -> s == (rot13 . rot13) s’

test/Spec.hs:20:30: error:
    • Ambiguous type variable ‘c0’ arising from a use of ‘rot13’
      prevents the constraint ‘(Rot13 c0)’ from being solved.
      Relevant bindings include s :: c0 (bound at test/Spec.hs:20:19)
      Probable fix: use a type annotation to specify what ‘c0’ should be.
      These potential instances exist:
        instance Rot13 Integer -- Defined in ‘Codec.Rot13’
        instance Rot13 Char -- Defined in ‘Codec.Rot13’
        instance Rot13 Int -- Defined in ‘Codec.Rot13’
        ...plus two others
        ...plus 22 instances involving out-of-scope types
        (use -fprint-potential-instances to see them all)
    • In the first argument of ‘(.)’, namely ‘rot13’
      In the expression: rot13 . rot13
      In the second argument of ‘(==)’, namely ‘(rot13 . rot13) s’

I was able to reproduce on my local machine like so:

$ stack unpack rot13-0.2.0.0 && cd rot13-0.2.0.0
$ stack init --resolver nightly-2017-07-10
$ stack test

[DanBurton]

I've constrained rot13 on Stackage to < 0.2.0.0 for now. Kindly fix the test suite and we'll remove the constraint. Alternatively, to lift the constraint immediately, you can ask us to add this package to the "expected-test-failures" list.

[kvanbere]

Thanks for reporting , I'll look into it asap

[kvanbere]

@DanBurton I have pushed a fix and blacklisted 0.2.0.0 on Hackage.

Please use 0.2.0.1. Sorry for the inconvenience.

$ stack test
...
Codec.Rot13
  correctly ciphers the alphabet (rot13 String)
  correctly ciphers the alphabet (rot13 ByteString)
  correctly ciphers the alphabet (rot13 Text)
  is reversible (String)
  is reversible (ByteString)
  is reversible (Text)

Finished in 0.0185 seconds
6 examples, 0 failures
             
Completed 2 action(s).

[DanBurton]

Great, thanks!