forked from github/purescript-typeable
f3dd0c0fb1
Part of this work was done by @the-dr-lazy in https://github.com/ajnsit/purescript-typeable/pull/3. GOOD: Now there is no more dependence on dictionaries being passed as function arguments at runtime. BAD: 1. However, we still depend on the dictionaries being stable at runtime. 2. We now also assume that the output of the new function `makeTag` will never be cached.
72 lines
2.7 KiB
Haskell
72 lines
2.7 KiB
Haskell
module Test.Main where
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import Prelude
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import Control.Monad.Error.Class (class MonadThrow)
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import Data.Either (Either)
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import Data.Typeable (class Tagged, TypeRep, eqTypeRep, makeTag, typeRep, typeRepFromVal)
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import Effect (Effect)
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import Effect.Aff (launchAff_)
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import Effect.Exception (Error)
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import Test.Person (Person, typeArrPerson, typePerson)
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import Test.Spec (describe, it)
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import Test.Spec.Assertions (shouldEqual)
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import Test.Spec.Reporter.Console (consoleReporter)
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import Test.Spec.Runner (runSpec)
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foreign import clog :: forall a. a -> Effect Unit
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assert :: forall m. MonadThrow Error m => Boolean -> m Unit
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assert = shouldEqual true
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deny :: forall m. MonadThrow Error m => Boolean -> m Unit
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deny = shouldEqual false
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main :: Effect Unit
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main = do
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launchAff_ $ runSpec [ consoleReporter ] do
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describe "Typeable" do
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it "can handle primitives" do
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deny $ eqTypeRep (typeRep :: _ Int) (typeRep :: _ Char)
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it "can handle unsaturated types" do
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assert $ eqTypeRep (typeRep :: _ Array) (typeRep :: _ Array)
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assert $ eqTypeRep (typeRep :: _ Optional) (typeRep :: _ Optional)
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deny $ eqTypeRep (typeRep :: _ (Optional Int)) (typeRep :: _ (Optional Char))
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it "can handle mixed arity" do
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deny $ eqTypeRep (typeRep :: _ Array) (typeRep :: _ Person)
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it "can handle user defined data types" do
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assert $ eqTypeRep (typeRep :: _ Person) typePerson
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assert $ eqTypeRep (typeRep :: _ Person) (typeRep :: _ Person)
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it "can distinguish between distinct types with matching fields" do
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deny $ eqTypeRep (typeRep :: _ Person) (typeRep :: _ Person2)
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it "can handle nested types" do
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assert $ eqTypeRep (typeRep :: _ (Either Int Person)) (typeRep :: _ (Either Int Person))
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assert $ eqTypeRep (typeRep :: _ (Array Person)) typeArrPerson
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deny $ eqTypeRep (typeRep :: _ (Array Person2)) typeArrPerson
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it "can handle bare records" do
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assert $ eqTypeRep typeRecord (typeRep :: _ { name :: String, age :: Int })
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it "can generate type reps from values" do
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assert $ eqTypeRep (typeRep :: _ (Optional Int)) (typeRepFromVal (Some 1))
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deny $ eqTypeRep (typeRep :: _ (Optional Person)) (typeRepFromVal (Some 1))
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where
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typeRecord :: TypeRep { age :: Int, name :: String }
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typeRecord = typeRep
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-- -- A data type without a typeable instance
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-- data Break
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-- -- The following should not compile since Break does not have a typeable instance
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-- typeRecordBreak :: TypeRep {break::Break, name::String}
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-- typeRecordBreak = typeRep
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newtype Person2 = Person2 { name :: String, location :: String }
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instance tagPerson2 :: Tagged Person2 where
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tag = makeTag unit
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data Optional a = None | Some a
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instance tagOptional :: Tagged Optional where
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tag = makeTag unit
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