Before:
  runtime ale_linters/eruby/erubi.vim
  call ale#test#SetDirectory('/testplugin/test/command_callback')

After:
  call ale#linter#Reset()
  call ale#test#RestoreDirectory()

Execute(Executable should not contain any filter code by default):
  call ale#test#SetFilename('../ruby_fixtures/not_a_rails_app/file.rb')

  AssertEqual
  \ 'ruby -r erubi/capture_end -e ' . ale#Escape('puts Erubi::CaptureEndEngine.new($stdin.read).src') . '< %t | ruby -c',
  \ ale_linters#eruby#erubi#GetCommand(bufnr(''), [])

Execute(Executable should filter invalid eRuby when inside a Rails project):
  call ale#test#SetFilename('../ruby_fixtures/valid_rails_app/app/views/my_great_view.html.erb')

  AssertEqual
  \ 'ruby -r erubi/capture_end -e ' . ale#Escape('puts Erubi::CaptureEndEngine.new($stdin.read.gsub(%{<%=},%{<%}), nil, %{-}).src') . '< %t | ruby -c',
  \ ale_linters#eruby#erubi#GetCommand(bufnr(''), [])

Execute(Command should be blank if the first command in the chain return output):
  let output_lines = [
  \    "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- erubi/capture_end (LoadError)",
  \    "        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'",
  \]

  AssertEqual
  \ '',
  \ ale_linters#eruby#erubi#GetCommand(bufnr(''), output_lines)