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{- 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 #-}
{-# LANGUAGE PackageImports #-}
module Language.GraphQL.FragmentSpec
( spec
) where
import qualified Data.HashMap.Strict as HashMap
import Data.Text (Text)
import Language.GraphQL.AST (Name)
import Data.HashMap.Strict (HashMap)
import Language.GraphQL.Type
import Language.GraphQL.Error
import qualified Language.GraphQL.Type.Out as Out
import Language.GraphQL.TH
import qualified Language.GraphQL as GraphQL
import Test.Hspec (Spec, describe, it)
import "graphql-spice" 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
let localSchema = toSchema "Hat" $ garment "Hat"
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) inlineQuery
let expected = Object
$ HashMap.singleton "garment"
$ Object
$ HashMap.singleton "circumference"
$ Int 60
in actual `shouldResolveTo` expected
it "chooses the last selection if the type matches" $ do
let localSchema = toSchema "Shirt" $ garment "Shirt"
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) inlineQuery
let expected = Object
$ HashMap.singleton "garment"
$ Object
$ HashMap.singleton "size"
$ String "L"
in actual `shouldResolveTo` expected
it "embeds inline fragments without type" $ do
let sourceQuery = [gql|
{
circumference
... {
size
}
}
|]
let localSchema = toSchema "circumference" circumference
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) sourceQuery
let expected = Object $ HashMap.fromList
[ ("circumference", Int 60)
, ("size", String "L")
]
in actual `shouldResolveTo` expected
it "evaluates fragments on Query" $ do
let sourceQuery = [gql|
{
... {
size
}
}
|]
localSchema = toSchema "size" size
actual :: Text -> IO (Either (ResponseEventStream IO Value) (Response Value))
actual = GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value)
in actual `shouldResolve` sourceQuery
describe "Fragment spread executor" $ do
it "evaluates fragment spreads" $ do
let sourceQuery = [gql|
{
...circumferenceFragment
}
fragment circumferenceFragment on Hat {
circumference
}
|]
let localSchema = toSchema "circumference" circumference
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) sourceQuery
let expected = Object
$ HashMap.singleton "circumference"
$ Int 60
in actual `shouldResolveTo` expected
it "evaluates nested fragments" $ do
let sourceQuery = [gql|
{
garment {
...circumferenceFragment
}
}
fragment circumferenceFragment on Hat {
...hatFragment
}
fragment hatFragment on Hat {
circumference
}
|]
let localSchema = toSchema "Hat" $ garment "Hat"
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) sourceQuery
let expected = Object
$ HashMap.singleton "garment"
$ Object
$ HashMap.singleton "circumference"
$ Int 60
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 = Object
$ HashMap.singleton "garment"
$ Object
$ HashMap.singleton "circumference"
$ Int 60
let localSchema = toSchema "Hat" $ garment "Hat"
actual <- GraphQL.graphql localSchema Nothing (mempty :: HashMap Name Value) sourceQuery
actual `shouldResolveTo` expected
|
