graphql-engine/server/src-test/Data/TimeSpec.hs

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module Data.TimeSpec (spec) where
-- | Time-related properties we care about.
import Prelude
import Data.Time.Clock.Units
import Data.Time
import Data.Aeson
import Test.Hspec
spec :: Spec
spec = do
timeUnitsSpec
diffTimeSpec
timeUnitsSpec :: Spec
timeUnitsSpec =
describe "time units" $ do
it "converts correctly" $ do
seconds 123 `shouldBe` 123
milliseconds 123 `shouldBe` 0.123
microseconds 123 `shouldBe` 0.000123
nanoseconds 123 `shouldBe` 0.000000123
it "has a correct Read instance" $ do
seconds (read "123") `shouldBe` 123
milliseconds (read "123") `shouldBe` 0.123
microseconds (read "123") `shouldBe` 0.000123
nanoseconds (read "123") `shouldBe` 0.000000123
it "JSON serializes as proper units" $ do
toJSON (1 :: Seconds) `shouldBe` Number 1
decode "1.0" `shouldBe` Just (1 :: Seconds)
it "converts with fromUnits" $ do
fromUnits (2 :: Minutes) `shouldBe` (120 :: NominalDiffTime)
fromUnits (60 :: Seconds) `shouldBe` (1 :: Minutes)
diffTimeSpec :: Spec
diffTimeSpec =
describe "DiffTime" $ do
it "JSON serializes as seconds" $ do
-- although we would prefer to use Seconds instead...
toJSON (1 :: DiffTime) `shouldBe` Number 1
decode "1.0" `shouldBe` Just (1 :: DiffTime)