module RecordSpec where
import Composite.Record
import Composite.TH (withLensesAndProxies)
import Control.Lens (view, set, _Just)
import Test.Hspec (Spec, describe, it, shouldBe)
withLensesAndProxies [d|
type FFoo = "foo" :-> Int
type FBar = "bar" :-> String
|]
type TestRec = '["foo" :-> Int, "bar" :-> String]
recordSuite :: Spec
recordSuite = do
describe "Basic record utilities" $ do
it "Supports construction and deconstruction of a Rec Identity" $ do
let rec = 123 :*: "foo" :*: RNil :: Record TestRec
foo :*: bar :*: RNil = rec
foo `shouldBe` 123
bar `shouldBe` "foo"
it "Supports construction and deconstruction of a Rec f" $ do
let rec = Just 123 :^: Nothing :^: RNil :: Rec Maybe TestRec
Just foo :^: Nothing :^: RNil = rec
foo `shouldBe` 123
it "Supports lensing in a Rec Identity" $ do
let rec = 123 :*: "foo" :*: RNil :: Record TestRec
view (rlens fFoo_) rec `shouldBe` 123
view (rlens fBar_) rec `shouldBe` "foo"
set (rlens fFoo_) 321 rec `shouldBe` (321 :*: "foo" :*: RNil)
set (rlens fBar_) "bar" rec `shouldBe` (123 :*: "bar" :*: RNil)
it "Supports lensing in a Rec Maybe" $ do
let rec = Just 123 :^: Nothing :^: RNil :: Rec Maybe TestRec
view (rlens' fFoo_) rec `shouldBe` Just 123
view (rlens' fBar_) rec `shouldBe` Nothing
set (rlens' fFoo_ . _Just) 321 rec `shouldBe` (Just 321 :^: Nothing :^: RNil)
set (rlens' fBar_ . _Just) "bar" rec `shouldBe` (Just 123 :^: Nothing :^: RNil)