{-# LANGUAGE OverloadedStrings #-}

module Spec.IO (tests) where

import Data.Default (def)
import Hakyll.Convert.Common (DistilledPost (..))
import Hakyll.Convert.IO (savePost)
import Spec.SpecHelpers
import System.Directory (doesFileExist)
import System.FilePath ((</>))
import System.IO.Temp (withSystemTempDirectory)
import Test.Tasty (TestTree, testGroup)
import Test.Tasty.HUnit

tests :: TestTree
tests =
  testGroup
    "IO.savePost"
    [ namesTheFileAccordingToFormat
    ]

namesTheFileAccordingToFormat :: TestTree
namesTheFileAccordingToFormat =
  testCase
    "Names the output file according to the given filename format"
    ( withSystemTempDirectory "hakyll-convert" $ \tempDir -> do
        let output_format = "%o-%Y^%y%%_%s%dd & %m—%S%H%M"
        let file_extension = "xyz"
        let post =
              def
                { -- The slug, %s, is going to be "yet-another"
                  dpUri = "https://example.com/2020/yet-another.post.html",
                  dpDate = fromGregorian 2020 11 6 11 33 46
                }

        let expectedFilename = tempDir </> "2020/yet-another-2020^20%_yet-another06d & 11—461133.xyz"

        filename <- savePost tempDir output_format file_extension post
        expectedFilename @=? filename

        exists <- doesFileExist expectedFilename
        assertBool "The file with expected name doesn't exist" exists
    )