forked from OSS/graphql
a088c81944
The `Schema` has been overhauled to make `Output` monomorphic. Traversing the `GraphQL` document is handled implicitly while defining the `Schema`. The 4th end-to-end test from `graphql-js` has been ported.
342 lines
9.1 KiB
Haskell
342 lines
9.1 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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module Test.StarWars where
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#if !MIN_VERSION_base(4,8,0)
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import Control.Applicative ((<$>), pure)
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import Data.Monoid (mempty)
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import Data.Traversable (traverse)
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#endif
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import Control.Applicative (Alternative, (<|>), empty, liftA2)
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import Data.Foldable (fold)
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import Data.Maybe (catMaybes)
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import Data.Aeson (object, (.=))
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import Data.HashMap.Strict (HashMap)
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import qualified Data.HashMap.Strict as HashMap
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import Data.Text (Text)
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import Text.RawString.QQ (r)
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import Test.Tasty (TestTree, testGroup)
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import Test.Tasty.HUnit (testCase, (@?=))
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import Data.GraphQL
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import Data.GraphQL.Schema
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-- * Test
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-- See https://github.com/graphql/graphql-js/blob/master/src/__tests__/starWarsQueryTests.js
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test :: TestTree
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test = testGroup "Star Wars Query Tests"
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[ testGroup "Basic Queries"
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[ testCase "R2-D2 hero" $ (@?=) (graphql schema [r|
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query HeroNameQuery {
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hero {
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id
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}
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}|]) . Just
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$ object [
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"hero" .= object [
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"id" .= ("2001" :: Text)
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]
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]
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, testCase "R2-D2 ID and friends" $ (@?=) (graphql schema [r|
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query HeroNameAndFriendsQuery {
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hero {
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id
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name
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friends {
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name
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}
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}
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}|]) . Just
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$ object [
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"hero" .= object [
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"id" .= ("2001" :: Text)
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, "name" .= ("R2-D2" :: Text)
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, "friends" .= [
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object ["name" .= ("Luke Skywalker" :: Text)]
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, object ["name" .= ("Han Solo" :: Text)]
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, object ["name" .= ("Leia Organa" :: Text)]
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]
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]
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]
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]
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, testGroup "Nested Queries"
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[ testCase "R2-D2 friends" $ (@?=) (graphql schema [r|
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query NestedQuery {
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hero {
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name
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friends {
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name
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appearsIn
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friends {
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name
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}
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}
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}
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}|]) . Just
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$ object [
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"hero" .= object [
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"name" .= ("R2-D2" :: Text)
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, "friends" .= [
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object [
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"name" .= ("Luke Skywalker" :: Text)
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, "appearsIn" .= ["NEWHOPE","EMPIRE","JEDI" :: Text]
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, "friends" .= [
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object ["name" .= ("Han Solo" :: Text)]
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, object ["name" .= ("Leia Organa" :: Text)]
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, object ["name" .= ("C-3PO" :: Text)]
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, object ["name" .= ("R2-D2" :: Text)]
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]
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]
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, object [
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"name" .= ("Han Solo" :: Text)
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, "appearsIn" .= [ "NEWHOPE","EMPIRE","JEDI" :: Text]
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, "friends" .= [
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object ["name" .= ("Luke Skywalker" :: Text)]
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, object ["name" .= ("Leia Organa" :: Text)]
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, object ["name" .= ("R2-D2" :: Text)]
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]
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]
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, object [
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"name" .= ("Leia Organa" :: Text)
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, "appearsIn" .= [ "NEWHOPE","EMPIRE","JEDI" :: Text]
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, "friends" .= [
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object ["name" .= ("Luke Skywalker" :: Text)]
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, object ["name" .= ("Han Solo" :: Text)]
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, object ["name" .= ("C-3PO" :: Text)]
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, object ["name" .= ("R2-D2" :: Text)]
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]
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]
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]
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]
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]
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, testCase "Luke ID" $ (@?=) (graphql schema [r|
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query FetchLukeQuery {
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human(id: "1000") {
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name
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}
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}|]) . Just
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$ object [
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"human" .= object [
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"name" .= ("Luke Skywalker" :: Text)
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]
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]
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]
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]
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-- * Schema
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-- See https://github.com/graphql/graphql-js/blob/master/src/__tests__/starWarsSchema.js
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type ID = Text
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schema :: (Alternative m, Monad m) => Schema m
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schema = Schema query
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query :: (Alternative m, Monad m) => QueryRoot m
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query (InputField "hero" args ins) = hero args ins
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query (InputField "human" args ins) = human args ins
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query (InputField "droid" args ins) = droid args ins
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query _ = empty
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hero :: Alternative f => [Argument] -> [Input] -> f Output
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hero [] = characterFields artoo
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hero [("episode", ScalarInt n)] = characterFields $ getHero n
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hero _ = const empty
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human :: (Alternative m, Monad m) => [Argument] -> [Input] -> m Output
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human [("id", ScalarString i)] ins = flip characterFields ins =<< getHuman i
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human _ _ = empty
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droid :: (Alternative m, Monad m) => [Argument] -> [Input] -> m Output
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droid [("id", ScalarString i)] ins = flip characterFields ins =<< getDroid i
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droid _ _ = empty
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episode :: Alternative f => Int -> f Output
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episode 4 = pure $ OutputEnum "NEWHOPE"
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episode 5 = pure $ OutputEnum "EMPIRE"
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episode 6 = pure $ OutputEnum "JEDI"
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episode _ = empty
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characterField :: Alternative f => Character -> Input -> f (HashMap Text Output)
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characterField char (InputField "id" [] []) =
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pure . HashMap.singleton "id" . OutputScalar . ScalarString . id_ $ char
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characterField char (InputField "name" [] []) =
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pure . HashMap.singleton "name" . OutputScalar . ScalarString . name $ char
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characterField char (InputField "friends" [] ins) =
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fmap (HashMap.singleton "friends" . OutputList)
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. traverse (`characterFields` ins)
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. getFriends
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$ char
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characterField char (InputField "appearsIn" [] []) =
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fmap (HashMap.singleton "appearsIn" . OutputList)
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. traverse episode
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. appearsIn
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$ char
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characterField _ _ = empty
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characterFields :: Alternative f => Character -> [Input] -> f Output
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characterFields char = fmap (OutputObject . fold) . traverse (characterField char)
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-- * Data
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-- See https://github.com/graphql/graphql-js/blob/master/src/__tests__/starWarsData.js
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-- ** Characters
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data CharCommon = CharCommon
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{ _id_ :: ID
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, _name :: Text
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, _friends :: [ID]
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, _appearsIn :: [Int]
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} deriving (Show)
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data Human = Human
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{ _humanChar :: CharCommon
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, homePlanet :: Text
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}
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data Droid = Droid
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{ _droidChar :: CharCommon
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, primaryFunction :: Text
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}
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type Character = Either Droid Human
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-- I don't think this is cumbersome enough to make it worth using lens.
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id_ :: Character -> ID
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id_ (Left x) = _id_ . _droidChar $ x
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id_ (Right x) = _id_ . _humanChar $ x
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name :: Character -> Text
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name (Left x) = _name . _droidChar $ x
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name (Right x) = _name . _humanChar $ x
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friends :: Character -> [ID]
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friends (Left x) = _friends . _droidChar $ x
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friends (Right x) = _friends . _humanChar $ x
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appearsIn :: Character -> [Int]
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appearsIn (Left x) = _appearsIn . _droidChar $ x
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appearsIn (Right x) = _appearsIn . _humanChar $ x
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luke :: Character
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luke = Right luke'
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luke' :: Human
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luke' = Human
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{ _humanChar = CharCommon
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{ _id_ = "1000"
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, _name = "Luke Skywalker"
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, _friends = ["1002","1003","2000","2001"]
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, _appearsIn = [4,5,6]
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}
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, homePlanet = "Tatoonie"
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}
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vader :: Human
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vader = Human
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{ _humanChar = CharCommon
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{ _id_ = "1001"
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, _name = "Darth Vader"
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, _friends = ["1004"]
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, _appearsIn = [4,5,6]
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}
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, homePlanet = "Tatooine"
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}
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han :: Human
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han = Human
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{ _humanChar = CharCommon
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{ _id_ = "1002"
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, _name = "Han Solo"
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, _friends = ["1000","1003","2001" ]
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, _appearsIn = [4,5,6]
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}
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, homePlanet = mempty
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}
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leia :: Human
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leia = Human
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{ _humanChar = CharCommon
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{ _id_ = "1003"
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, _name = "Leia Organa"
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, _friends = ["1000","1002","2000","2001"]
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, _appearsIn = [4,5,6]
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}
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, homePlanet = "Alderaan"
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}
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tarkin :: Human
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tarkin = Human
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{ _humanChar = CharCommon
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{ _id_ = "1004"
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, _name = "Wilhuff Tarkin"
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, _friends = ["1001"]
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, _appearsIn = [4]
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}
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, homePlanet = mempty
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}
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threepio :: Droid
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threepio = Droid
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{ _droidChar = CharCommon
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{ _id_ = "2000"
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, _name = "C-3PO"
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, _friends = ["1000","1002","1003","2001" ]
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, _appearsIn = [ 4, 5, 6 ]
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}
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, primaryFunction = "Protocol"
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}
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artoo :: Character
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artoo = Left artoo'
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artoo' :: Droid
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artoo' = Droid
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{ _droidChar = CharCommon
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{ _id_ = "2001"
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, _name = "R2-D2"
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, _friends = ["1000","1002","1003"]
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, _appearsIn = [4,5,6]
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}
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, primaryFunction = "Astrometch"
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}
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-- ** Helper functions
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getHero :: Int -> Character
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getHero 5 = luke
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getHero _ = artoo
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getHeroIO :: Int -> IO Character
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getHeroIO = pure . getHero
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getHuman :: Alternative f => ID -> f Character
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getHuman = fmap Right . getHuman'
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getHuman' :: Alternative f => ID -> f Human
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getHuman' "1000" = pure luke'
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getHuman' "1001" = pure vader
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getHuman' "1002" = pure han
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getHuman' "1003" = pure leia
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getHuman' "1004" = pure tarkin
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getHuman' _ = empty
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getDroid :: Alternative f => ID -> f Character
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getDroid = fmap Left . getDroid'
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getDroid' :: Alternative f => ID -> f Droid
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getDroid' "2000" = pure threepio
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getDroid' "2001" = pure artoo'
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getDroid' _ = empty
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getFriends :: Character -> [Character]
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getFriends char = catMaybes $ liftA2 (<|>) getDroid getHuman <$> friends char
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