Before:
  Save g:ale_linters
  call ale#assert#SetUpLinterTest('markdown', 'markdownlint_cli2')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default markdownlint-cli2 command should be correct):
  AssertLinter
  \ 'markdownlint-cli2',
  \ ale#Escape('markdownlint-cli2') . ' %s'

Execute(The executable and options should be configurable):
  let g:ale_markdown_markdownlint_cli2_executable = 'foo bar'
  let g:ale_markdown_markdownlint_cli2_options = '--no-globs'

  AssertLinter 'foo bar', ale#Escape('foo bar') . ' --no-globs %s'

Execute(markdownlint-cli2 should select the markdownlint-cli2 linter):
  let g:ale_linters = {'markdown': ['markdownlint-cli2']}

  AssertEqual
  \ ['markdownlint_cli2'],
  \ map(ale#linter#Get('markdown'), 'v:val.name')