Before:
  Save g:ale_run_synchronously
  Save g:ale_emulate_job_failure
  Save g:ale_buffer_info

  let g:ale_run_synchronously = 1
  let g:ale_buffer_info = {}
  let b:ale_history = []

  call ale#linter#Reset()
  call ale#assert#SetUpLinterTestCommands()
  call ale#linter#Define('foobar', {
  \ 'name': 'lint_file_linter',
  \ 'callback': 'LintFileCallback',
  \ 'executable': has('win32') ? 'cmd' : 'echo',
  \ 'command': {b -> ale#command#Run(b, 'echo', {-> ale#command#Run(b, 'echo', {-> 'foo'})})},
  \ 'read_buffer': 0,
  \})

  " Run the test commands in the shell.
  let g:ale_run_synchronously_emulate_commands = 0

After:
  Restore

  call ale#assert#TearDownLinterTest()
  unlet! g:ale_run_synchronously_callbacks

Given foobar (Some imaginary filetype):
Execute(It should be possible to compute an executable to check based on the result of commands):
  AssertLinter has('win32') ? 'cmd' : 'echo', 'foo'

  ALELint
  call ale#test#FlushJobs()

  AssertEqual
  \ 1,
  \ len(filter(copy(b:ale_history), 'string(v:val.command) =~# ''foo'''))

Execute(It handle the deferred command failing):
  let g:ale_emulate_job_failure = 1

  AssertLinter has('win32') ? 'cmd' : 'echo', 0

  ALELint
  call ale#test#FlushJobs()

  AssertEqual
  \ 0,
  \ len(filter(copy(b:ale_history), 'string(v:val.command) =~# ''foo'''))