Execute(The ghc handler should handle hdevtools output):
  call ale#test#SetFilename('foo.hs')

  AssertEqual
  \ [
  \   {
  \     'lnum': 147,
  \     'type': 'W',
  \     'col': 62,
  \     'text': '• Couldnt match type ‘a -> T.Text’ with ‘T.Text’ Expected type: [T.Text]',
  \   },
  \ ],
  \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
  \ 'foo.hs:147:62: warning:',
  \ '• Couldnt match type ‘a -> T.Text’ with ‘T.Text’',
  \ '  Expected type: [T.Text]',
  \ ])

Execute(The ghc handler should handle ghc 8 output):
  call ale#test#SetFilename('src/Appoint/Lib.hs')

  AssertEqual
  \ [
  \   {
  \     'lnum': 6,
  \     'type': 'E',
  \     'col': 1,
  \     'text': 'Failed to load interface for ‘GitHub.Data’ Use -v to see a list of the files searched for.',
  \   },
  \   {
  \     'lnum': 7,
  \     'type': 'W',
  \     'col': 1,
  \     'text': 'Failed to load interface for ‘GitHub.Endpoints.PullRequests’ Use -v to see a list of the files searched for.',
  \   },
  \ ],
  \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
  \ '',
  \ 'src/Appoint/Lib.hs:6:1: error:',
  \ '    Failed to load interface for ‘GitHub.Data’',
  \ '    Use -v to see a list of the files searched for.',
  \ '',
  \ 'src/Appoint/Lib.hs:7:1: warning:',
  \ '    Failed to load interface for ‘GitHub.Endpoints.PullRequests’',
  \ '    Use -v to see a list of the files searched for.',
  \ ])

Execute(The ghc handler should handle ghc 7 output):
  call ale#test#SetFilename('src/Main.hs')

  AssertEqual
  \ [
  \   {
  \     'lnum': 168,
  \     'type': 'E',
  \     'col': 1,
  \     'text': 'parse error (possibly incorrect indentation or mismatched brackets)',
  \   },
  \   {
  \     'lnum': 84,
  \     'col': 1,
  \     'type': 'W',
  \     'text': 'Top-level binding with no type signature:^@  myLayout :: Choose Tall (Choose (Mirror Tall) Full) a',
  \   },
  \   {
  \     'lnum': 94,
  \     'col': 5,
  \     'type': 'E',
  \     'text': 'Some other error',
  \   },
  \ ],
  \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
  \ 'src/Main.hs:168:1:',
  \ '    parse error (possibly incorrect indentation or mismatched brackets)',
  \ 'src/Main.hs:84:1:Warning: Top-level binding with no type signature:^@  myLayout :: Choose Tall (Choose (Mirror Tall) Full) a',
  \ 'src/Main.hs:94:5:Error:',
  \ '  Some other error',
  \ ])