{-# LANGUAGE OverloadedStrings #-}

module Text.InflectionsSpec (spec) where

import Test.Hspec
import Test.QuickCheck
import Text.Inflections

spec :: Spec
spec = do

  describe "toUnderscore" $ do
    it "converts camel case to snake case" $
      toUnderscore "camelCasedText" `shouldBe` Right "camel_cased_text"
    it "converts camel case to snake case with numbers" $
      toUnderscore "ipv4Address" `shouldBe` Right "ipv4_address"

  describe "toDashed" $
    it "converts camel case to dashed" $
      toDashed "camelCasedText" `shouldBe` Right "camel-cased-text"

  describe "toCamelCased" $ do
    context "when the first argument is False" $
      it "converts snake case to camel case" $
        toCamelCased False "underscored_text" `shouldBe` Right "underscoredText"
    context "when the first argument is True" $
      it "converts snake case to camel case with the first word capitalized" $
        toCamelCased True "underscored_text" `shouldBe` Right "UnderscoredText"

  describe "betterThrow" $ do
    context "when given a parse error" $
      it "throws the correct exception" $
        property $ \err ->
          betterThrow (Left err) `shouldThrow`
            (== InflectionParsingFailed err)
    context "when given a value in Right" $
      it "returns the value" $
        property $ \x ->
          betterThrow (Right x) `shouldReturn` (x :: Int)