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Merge pull request #5920 from IntersectMBO/ensure-query-test-complete…
…ness Ensure query test completeness
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module Testnet.TestEnumGenerator | ||
( genTestType | ||
, genAllConstructorsList | ||
) where | ||
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import Language.Haskell.TH (Body (NormalB), Con (..), Dec (DataD, ValD), | ||
Exp (ConE, ListE), Info (TyConI), Name, Pat (VarP), Q, mkName, nameBase, reify) | ||
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-- | Create a datatype with the same constructors as the given type, but with a "Test" prefix and no arguments. | ||
-- For example, if the input type is 'Maybe', the output type will be 'TestMaybe', with constructors 'TestNothing' | ||
-- and 'TestJust', but 'TestJust' will have no arguments. | ||
genTestType :: Name -> Q [Dec] | ||
genTestType typeName = do | ||
TyConI (DataD _ _ _ _ constructors _) <- reify typeName | ||
let newConstructors = map (makeSimpleConstructor . addTestPrefix) $ concatMap getConstructorName constructors | ||
return [DataD [] (addTestPrefix typeName) [] Nothing newConstructors []] | ||
where | ||
addTestPrefix :: Name -> Name | ||
addTestPrefix name = mkName $ "Test" ++ nameBase name | ||
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makeSimpleConstructor :: Name -> Con | ||
makeSimpleConstructor n = NormalC n [] | ||
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-- | Generate a declaration with a list of all constructors of a type. For example, if the input type is 'Maybe', | ||
-- the output will be 'allMaybeConstructors = [Nothing, Just]'. Obviously, this will only work if all constructors | ||
-- have types that can be unified, like is the case with nullary constructors like the ones generated by 'genNewType'. | ||
genAllConstructorsList :: Name -> Q [Dec] | ||
genAllConstructorsList typeName = do | ||
constructorList <- getAllConstructors typeName | ||
return [ValD (VarP $ mkName $ "all" ++ nameBase typeName ++ "Constructors") (NormalB constructorList) []] | ||
where | ||
getAllConstructors :: Name -> Q Exp | ||
getAllConstructors typeName' = do | ||
TyConI (DataD _ _ _ _ constructors _) <- reify typeName' | ||
return $ ListE $ map ConE $ concatMap getConstructorName constructors | ||
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-- | Obtain the name or names from a constructor | ||
getConstructorName :: Con -> [Name] | ||
getConstructorName (NormalC na _) = [na] | ||
getConstructorName (RecC na _) = [na] | ||
getConstructorName (InfixC _ na _) = [na] | ||
getConstructorName (ForallC _ _ con) = getConstructorName con | ||
getConstructorName (GadtC nas _ _) = nas | ||
getConstructorName (RecGadtC nas _ _) = nas |
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{-# LANGUAGE GADTs #-} | ||
{-# LANGUAGE TemplateHaskell #-} | ||
{-# OPTIONS_GHC -Wno-missing-signatures #-} | ||
{-# OPTIONS_GHC -Wno-unused-top-binds #-} | ||
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module Testnet.TestQueryCmds | ||
( TestQueryCmds(..) | ||
, forallQueryCommands | ||
) where | ||
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import Cardano.CLI.EraBased.Commands.Query (QueryCmds (..)) | ||
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import Testnet.TestEnumGenerator (genAllConstructorsList, genTestType) | ||
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-- | A datatype with the same constructors as 'QueryCmds', but with a "Test" prefix and no arguments. | ||
-- The generated type is called 'TestQueryCmds'. | ||
$(genTestType ''QueryCmds) | ||
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-- | A list of all constructors of 'TestQueryCmds', which are nullary. | ||
-- The generated list is called 'allTestQueryCmdsConstructors'. | ||
$(genAllConstructorsList ''TestQueryCmds) | ||
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-- | Maps a function over all constructors of 'TestQueryCmds' and sequences the results over a monad. | ||
forallQueryCommands :: Monad m => (TestQueryCmds -> m a) -> m () | ||
forallQueryCommands f = mapM_ f allTestQueryCmdsConstructors |
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