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" NOTE: We use the 'b:' forms below to ensure that we're properly using
" ale#Var()

Given dockerfile:
  #

Before:
  Save g:ale_dockerfile_hadolint_use_docker
  Save g:ale_dockerfile_hadolint_docker_image
  silent! unlet g:ale_dockerfile_hadolint_use_docker
  silent! unlet g:ale_dockerfile_hadolint_docker_image

  " enable loading inside test container
  silent! cd /testplugin
  source ale_linters/dockerfile/hadolint.vim


After:
  Restore
  silent! unlet b:ale_dockerfile_hadolint_use_docker
  silent! unlet b:ale_dockerfile_hadolint_docker_image


Execute(linter honors ..._use_docker correctly):

  " default: never
  AssertEqual
  \ 'hadolint',
  \ ale_linters#dockerfile#hadolint#GetExecutable(bufnr(''))

  " explicit never
  let b:ale_dockerfile_hadolint_use_docker = 'never'
  AssertEqual
  \ 'hadolint',
  \ ale_linters#dockerfile#hadolint#GetExecutable(bufnr(''))

  let b:ale_dockerfile_hadolint_use_docker = 'always'
  AssertEqual
  \ 'docker',
  \ ale_linters#dockerfile#hadolint#GetExecutable(bufnr(''))

  " hadolint if present, otherwise docker
  let command = 'docker'
  if executable('hadolint')
    let command = 'hadolint'
  endif

  let b:ale_dockerfile_hadolint_use_docker = 'yes'
  AssertEqual
  \ command,
  \ ale_linters#dockerfile#hadolint#GetExecutable(bufnr(''))


Execute(command is correct when using docker):
  let b:ale_dockerfile_hadolint_use_docker = 'always'

  AssertEqual
  \ "docker run --rm -i hadolint/hadolint",
  \ ale_linters#dockerfile#hadolint#GetCommand(bufnr(''))


Execute(command is correct when not docker):
  let b:ale_dockerfile_hadolint_use_docker = 'never'

  AssertEqual
  \ "hadolint -",
  \ ale_linters#dockerfile#hadolint#GetCommand(bufnr(''))

Execute(test warnings from hadolint):
  AssertEqual
  \ [{'lnum': 10, 'col': 0, 'type': 'W', 'text': 'Using latest is prone to errors', 'detail': "DL3007 ( https://github.com/hadolint/hadolint/wiki/DL3007 )\n\nUsing latest is prone to errors"}],
  \ ale_linters#dockerfile#hadolint#Handle(bufnr(''), [
  \ '/dev/stdin:10 DL3007 Using latest is prone to errors',
  \ ])

Execute(test warnings from shellcheck):
  AssertEqual
  \ [{'lnum': 3, 'col': 0, 'type': 'W', 'text': 'bar is referenced but not assigned.', 'detail': "SC2154 ( https://github.com/koalaman/shellcheck/wiki/SC2154 )\n\nbar is referenced but not assigned."}],
  \ ale_linters#dockerfile#hadolint#Handle(bufnr(''), [
  \ '/dev/stdin:3 SC2154 bar is referenced but not assigned.',
  \ ])

Execute(test errors from dockerfile parser):
  AssertEqual
  \ [{'lnum': 3, 'col': 4, 'type': 'E', 'text': 'unexpected "A" expecting at least one space after ''RUN''', 'detail': 'unexpected "A" expecting at least one space after ''RUN'''}],
  \ ale_linters#dockerfile#hadolint#Handle(bufnr(''), [
  \ "/dev/stdin:3:4 unexpected \"A\" expecting at least one space after 'RUN'",
  \ ])

" fin...