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|
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
module ErrorMessages
(
tests
) where
import Prelude.Compat
import Data.Aeson (FromJSON(..), Value, json)
import Data.Aeson.Types (Parser, formatError, iparse)
import Data.Aeson.Parser (eitherDecodeWith)
import Data.Algorithm.Diff (PolyDiff (..), getGroupedDiff)
import Data.Proxy (Proxy(..))
import Data.Semigroup ((<>))
import Data.Sequence (Seq)
import Instances ()
import Numeric.Natural (Natural)
import Test.Tasty (TestTree, TestName)
import Test.Tasty.Golden.Advanced (goldenTest)
import qualified Data.ByteString.Lazy.Char8 as L
import qualified Data.HashMap.Strict as HM
import Encoders
import Types
tests :: [TestTree]
tests =
[ aesonGoldenTest "simple" "tests/golden/simple.expected" output
, aesonGoldenTest "generic" "tests/golden/generic.expected" (outputGeneric G)
, aesonGoldenTest "generic" "tests/golden/th.expected" (outputGeneric TH)
]
output :: Output
output = concat
[ testFor "Int" (Proxy :: Proxy Int)
[ "\"\""
, "[]"
, "{}"
, "null"
]
, testFor "Integer" (Proxy :: Proxy Integer)
[ "44.44"
]
, testFor "Natural" (Proxy :: Proxy Natural)
[ "44.44"
, "-50"
]
, testFor "String" (Proxy :: Proxy String)
[ "1"
, "[]"
, "{}"
, "null"
]
, testFor "HashMap" (Proxy :: Proxy (HM.HashMap String Int))
[ "\"\""
, "[]"
]
-- issue #356
, testFor "Either" (Proxy :: Proxy (Int, Either (Int, Bool) ()))
[ "[1,{\"Left\":[2,3]}]"
]
-- issue #358
, testFor "Seq" (Proxy :: Proxy (Seq Int))
[ "[0,1,true]"
]
]
data Choice = TH | G
outputGeneric :: Choice -> Output
outputGeneric choice = concat
[ testWith "OneConstructor"
(select
thOneConstructorParseJSONDefault
gOneConstructorParseJSONDefault)
[ "\"X\""
, "[0]"
]
, testWith "Nullary"
(select
thNullaryParseJSONString
gNullaryParseJSONString)
[ "\"X\""
, "[]"
]
, testWithSomeType "SomeType (tagged)"
(select
thSomeTypeParseJSONTaggedObject
gSomeTypeParseJSONTaggedObject)
[ "{\"tag\": \"unary\", \"contents\": true}"
, "{\"tag\": \"unary\"}"
, "{\"tag\": \"record\"}"
, "{\"tag\": \"record\", \"testone\": true, \"testtwo\": null, \"testthree\": null}"
, "{\"tag\": \"X\"}"
, "{}"
, "[]"
]
, testWithSomeType "SomeType (single-field)"
(select
thSomeTypeParseJSONObjectWithSingleField
gSomeTypeParseJSONObjectWithSingleField)
[ "{\"unary\": {}}"
, "{\"unary\": []}"
, "{\"X\": []}"
, "{\"record\": {}, \"W\":{}}"
, "{}"
, "[]"
, "{\"unary\""
, "{\"unary\":"
, "{\"unary\":1"
]
, testWithSomeType "SomeType (two-element array)"
(select
thSomeTypeParseJSON2ElemArray
gSomeTypeParseJSON2ElemArray)
[ "[\"unary\", true]"
, "[\"record\", null]"
, "[\"X\", 0]"
, "[null, 0]"
, "[]"
, "{}"
, "[1"
, "[1,"
]
, testWithSomeType "SomeType (reject unknown fields)"
(select
thSomeTypeParseJSONRejectUnknownFields
gSomeTypeParseJSONRejectUnknownFields)
[ "{\"tag\": \"record\", \"testone\": 1.0, \"testZero\": 1}"
, "{\"testZero\": 1}"
, "{\"tag\": \"record\", \"testone\": true, \"testtwo\": null, \"testthree\": null}"
]
, testWithFoo "Foo (reject unknown fields)"
(select
thFooParseJSONRejectUnknownFields
gFooParseJSONRejectUnknownFields)
[ "{\"tag\": \"foo\"}"
]
, testWithFoo "Foo (reject unknown fields, tagged single)"
(select
thFooParseJSONRejectUnknownFieldsTagged
gFooParseJSONRejectUnknownFieldsTagged)
[ "{\"tag\": \"foo\", \"unknownField\": 0}"
]
, testWith "EitherTextInt"
(select
thEitherTextIntParseJSONUntaggedValue
gEitherTextIntParseJSONUntaggedValue)
[ "\"X\""
, "[]"
]
, testWith "Product2 Int Bool"
(select
thProduct2ParseJSON
gProduct2ParseJSON)
[ "[1, null]"
, "[]"
, "{}"
]
]
where
select a b = case choice of
TH -> a
G -> b
-- Test infrastructure
type Output = [String]
outputLine :: String -> Output
outputLine = pure
aesonGoldenTest :: TestName -> FilePath -> Output -> TestTree
aesonGoldenTest name ref out = goldenTest name (L.readFile ref) act cmp upd
where
act = pure (L.pack (unlines out))
upd = L.writeFile ref
cmp x y | x == y = return Nothing
cmp x y = return $ Just $ unlines $
concatMap f (getGroupedDiff (L.lines x) (L.lines y))
where
f (First xs) = map (cons3 '-' . L.unpack) xs
f (Second ys) = map (cons3 '+' . L.unpack) ys
-- we print unchanged lines too. It shouldn't be a problem while we have
-- reasonably small examples
f (Both xs _) = map (cons3 ' ' . L.unpack) xs
-- we add three characters, so the changed lines are easier to spot
cons3 c cs = c : c : c : ' ' : cs
testWith :: Show a => String -> (Value -> Parser a) -> [L.ByteString] -> Output
testWith name parser ts =
outputLine name <>
foldMap (\s ->
case eitherDecodeWith json (iparse parser) s of
Left err -> outputLine $ uncurry formatError err
Right a -> outputLine $ show a) ts
testFor :: forall a proxy. (FromJSON a, Show a)
=> String -> proxy a -> [L.ByteString] -> Output
testFor name _ = testWith name (parseJSON :: Value -> Parser a)
testWithSomeType :: String -> (Value -> Parser (SomeType Int)) -> [L.ByteString] -> Output
testWithSomeType = testWith
testWithFoo :: String -> (Value -> Parser Foo) -> [L.ByteString] -> Output
testWithFoo = testWith
|
