graphql-spice/tests/Language/GraphQL/FragmentSpec.hs

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2021-11-20 07:20:31 +01:00
{- This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. -}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
module Language.GraphQL.FragmentSpec
( spec
) where
import Data.Aeson ((.=))
import qualified Data.Aeson as Aeson
import qualified Data.HashMap.Strict as HashMap
import Data.Text (Text)
import Language.GraphQL
import Language.GraphQL.Type
import qualified Language.GraphQL.Type.Out as Out
import Language.GraphQL.TH
import Test.Hspec (Spec, describe, it)
import Test.Hspec.GraphQL
size :: (Text, Value)
size = ("size", String "L")
circumference :: (Text, Value)
circumference = ("circumference", Int 60)
garment :: Text -> (Text, Value)
garment typeName =
("garment", Object $ HashMap.fromList
[ if typeName == "Hat" then circumference else size
, ("__typename", String typeName)
]
)
inlineQuery :: Text
inlineQuery = [gql|
{
garment {
... on Hat {
circumference
}
... on Shirt {
size
}
}
}
|]
shirtType :: Out.ObjectType IO
shirtType = Out.ObjectType "Shirt" Nothing [] $ HashMap.fromList
[ ("size", sizeFieldType)
]
hatType :: Out.ObjectType IO
hatType = Out.ObjectType "Hat" Nothing [] $ HashMap.fromList
[ ("size", sizeFieldType)
, ("circumference", circumferenceFieldType)
]
circumferenceFieldType :: Out.Resolver IO
circumferenceFieldType
= Out.ValueResolver (Out.Field Nothing (Out.NamedScalarType int) mempty)
$ pure $ snd circumference
sizeFieldType :: Out.Resolver IO
sizeFieldType
= Out.ValueResolver (Out.Field Nothing (Out.NamedScalarType string) mempty)
$ pure $ snd size
toSchema :: Text -> (Text, Value) -> Schema IO
toSchema t (_, resolve) = schema queryType Nothing Nothing mempty
where
garmentType = Out.UnionType "Garment" Nothing [hatType, shirtType]
typeNameField = Out.Field Nothing (Out.NamedScalarType string) mempty
garmentField = Out.Field Nothing (Out.NamedUnionType garmentType) mempty
queryType =
case t of
"circumference" -> hatType
"size" -> shirtType
_ -> Out.ObjectType "Query" Nothing []
$ HashMap.fromList
[ ("garment", ValueResolver garmentField (pure resolve))
, ("__typename", ValueResolver typeNameField (pure $ String "Shirt"))
]
spec :: Spec
spec = do
describe "Inline fragment executor" $ do
it "chooses the first selection if the type matches" $ do
actual <- graphql (toSchema "Hat" $ garment "Hat") inlineQuery
let expected = HashMap.singleton "data"
$ Aeson.object
[ "garment" .= Aeson.object
[ "circumference" .= (60 :: Int)
]
]
in actual `shouldResolveTo` expected
it "chooses the last selection if the type matches" $ do
actual <- graphql (toSchema "Shirt" $ garment "Shirt") inlineQuery
let expected = HashMap.singleton "data"
$ Aeson.object
[ "garment" .= Aeson.object
[ "size" .= ("L" :: Text)
]
]
in actual `shouldResolveTo` expected
it "embeds inline fragments without type" $ do
let sourceQuery = [gql|
{
circumference
... {
size
}
}
|]
actual <- graphql (toSchema "circumference" circumference) sourceQuery
let expected = HashMap.singleton "data"
$ Aeson.object
[ "circumference" .= (60 :: Int)
, "size" .= ("L" :: Text)
]
in actual `shouldResolveTo` expected
it "evaluates fragments on Query" $ do
let sourceQuery = [gql|
{
... {
size
}
}
|]
in graphql (toSchema "size" size) `shouldResolve` sourceQuery
describe "Fragment spread executor" $ do
it "evaluates fragment spreads" $ do
let sourceQuery = [gql|
{
...circumferenceFragment
}
fragment circumferenceFragment on Hat {
circumference
}
|]
actual <- graphql (toSchema "circumference" circumference) sourceQuery
let expected = HashMap.singleton "data"
$ Aeson.object
[ "circumference" .= (60 :: Int)
]
in actual `shouldResolveTo` expected
it "evaluates nested fragments" $ do
let sourceQuery = [gql|
{
garment {
...circumferenceFragment
}
}
fragment circumferenceFragment on Hat {
...hatFragment
}
fragment hatFragment on Hat {
circumference
}
|]
actual <- graphql (toSchema "Hat" $ garment "Hat") sourceQuery
let expected = HashMap.singleton "data"
$ Aeson.object
[ "garment" .= Aeson.object
[ "circumference" .= (60 :: Int)
]
]
in actual `shouldResolveTo` expected
it "considers type condition" $ do
let sourceQuery = [gql|
{
garment {
...circumferenceFragment
...sizeFragment
}
}
fragment circumferenceFragment on Hat {
circumference
}
fragment sizeFragment on Shirt {
size
}
|]
expected = HashMap.singleton "data"
$ Aeson.object
[ "garment" .= Aeson.object
[ "circumference" .= (60 :: Int)
]
]
actual <- graphql (toSchema "Hat" $ garment "Hat") sourceQuery
actual `shouldResolveTo` expected