Before:
  Save g:ale_ruby_rails_best_practices_executable

  let g:ale_ruby_rails_best_practices_executable = 'rails_best_practices'

  runtime ale_linters/ruby/rails_best_practices.vim
  call ale#test#SetDirectory('/testplugin/test/command_callback')
  call ale#test#SetFilename('../ruby_fixtures/valid_rails_app/db/test.rb')

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(Executable should default to rails_best_practices):
  AssertEqual
  \ '''rails_best_practices'' --silent -f json --output-file /dev/stdout '
  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
  \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))

Execute(Should be able to set a custom executable):
  let g:ale_ruby_rails_best_practices_executable = 'bin/rails_best_practices'

  AssertEqual
  \ '''bin/rails_best_practices'' --silent -f json --output-file /dev/stdout '
  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
  \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))

Execute(Setting bundle appends 'exec rails_best_practices'):
  let g:ale_ruby_rails_best_practices_executable = 'path to/bundle'

  AssertEqual
  \ '''path to/bundle'' exec rails_best_practices --silent -f json --output-file /dev/stdout '
  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
  \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))

Execute(Command callback should be empty when not in a valid Rails app):
  call ale#test#SetFilename('../ruby_fixtures/not_a_rails_app/test.rb')

  AssertEqual
  \   '',
  \   ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))