graphql/tests/Language/GraphQL/Execute/CoerceSpec.hs

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{-# LANGUAGE OverloadedStrings #-}
module Language.GraphQL.Execute.CoerceSpec
( spec
) where
import Data.Aeson as Aeson ((.=))
import qualified Data.Aeson as Aeson
import qualified Data.Aeson.Types as Aeson
import qualified Data.HashMap.Strict as HashMap
import Data.Maybe (isNothing)
import Data.Scientific (scientific)
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import qualified Language.GraphQL.Execute.Coerce as Coerce
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import Language.GraphQL.Type
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import qualified Language.GraphQL.Type.In as In
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import Prelude hiding (id)
import Test.Hspec (Spec, describe, it, shouldBe, shouldSatisfy)
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direction :: EnumType
direction = EnumType "Direction" Nothing $ HashMap.fromList
[ ("NORTH", EnumValue Nothing)
, ("EAST", EnumValue Nothing)
, ("SOUTH", EnumValue Nothing)
, ("WEST", EnumValue Nothing)
]
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singletonInputObject :: In.Type
singletonInputObject = In.NamedInputObjectType type'
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where
type' = In.InputObjectType "ObjectName" Nothing inputFields
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inputFields = HashMap.singleton "field" field
field = In.InputField Nothing (In.NamedScalarType string) Nothing
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namedIdType :: In.Type
namedIdType = In.NamedScalarType id
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spec :: Spec
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spec = do
describe "VariableValue Aeson" $ do
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it "coerces strings" $
let expected = Just (String "asdf")
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actual = Coerce.coerceVariableValue
(In.NamedScalarType string) (Aeson.String "asdf")
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in actual `shouldBe` expected
it "coerces non-null strings" $
let expected = Just (String "asdf")
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actual = Coerce.coerceVariableValue
(In.NonNullScalarType string) (Aeson.String "asdf")
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in actual `shouldBe` expected
it "coerces booleans" $
let expected = Just (Boolean True)
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actual = Coerce.coerceVariableValue
(In.NamedScalarType boolean) (Aeson.Bool True)
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in actual `shouldBe` expected
it "coerces zero to an integer" $
let expected = Just (Int 0)
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actual = Coerce.coerceVariableValue
(In.NamedScalarType int) (Aeson.Number 0)
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in actual `shouldBe` expected
it "rejects fractional if an integer is expected" $
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let actual = Coerce.coerceVariableValue
(In.NamedScalarType int) (Aeson.Number $ scientific 14 (-1))
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in actual `shouldSatisfy` isNothing
it "coerces float numbers" $
let expected = Just (Float 1.4)
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actual = Coerce.coerceVariableValue
(In.NamedScalarType float) (Aeson.Number $ scientific 14 (-1))
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in actual `shouldBe` expected
it "coerces IDs" $
let expected = Just (String "1234")
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json = Aeson.String "1234"
actual = Coerce.coerceVariableValue namedIdType json
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in actual `shouldBe` expected
it "coerces input objects" $
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let actual = Coerce.coerceVariableValue singletonInputObject
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$ Aeson.object ["field" .= ("asdf" :: Aeson.Value)]
expected = Just $ Object $ HashMap.singleton "field" "asdf"
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in actual `shouldBe` expected
it "skips the field if it is missing in the variables" $
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let actual = Coerce.coerceVariableValue
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singletonInputObject Aeson.emptyObject
expected = Just $ Object HashMap.empty
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in actual `shouldBe` expected
it "fails if input object value contains extra fields" $
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let actual = Coerce.coerceVariableValue singletonInputObject
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$ Aeson.object variableFields
variableFields =
[ "field" .= ("asdf" :: Aeson.Value)
, "extra" .= ("qwer" :: Aeson.Value)
]
in actual `shouldSatisfy` isNothing
it "preserves null" $
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let actual = Coerce.coerceVariableValue namedIdType Aeson.Null
in actual `shouldBe` Just Null
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it "preserves list order" $
let list = Aeson.toJSONList ["asdf" :: Aeson.Value, "qwer"]
listType = (In.ListType $ In.NamedScalarType string)
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actual = Coerce.coerceVariableValue listType list
expected = Just $ List [String "asdf", String "qwer"]
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in actual `shouldBe` expected
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describe "coerceInputLiteral" $ do
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it "coerces enums" $
let expected = Just (Enum "NORTH")
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actual = Coerce.coerceInputLiteral
(In.NamedEnumType direction) (Enum "NORTH")
in actual `shouldBe` expected
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it "fails with non-existing enum value" $
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let actual = Coerce.coerceInputLiteral
(In.NamedEnumType direction) (Enum "NORTH_EAST")
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in actual `shouldSatisfy` isNothing
it "coerces integers to IDs" $
let expected = Just (String "1234")
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actual = Coerce.coerceInputLiteral namedIdType (Int 1234)
in actual `shouldBe` expected
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it "coerces nulls" $ do
let actual = Coerce.coerceInputLiteral namedIdType Null
in actual `shouldBe` Just Null
it "wraps singleton lists" $ do
let expected = Just $ List [List [String "1"]]
embeddedType = In.ListType $ In.ListType namedIdType
actual = Coerce.coerceInputLiteral embeddedType (String "1")
in actual `shouldBe` expected