Before:
  Save g:ale_run_synchronously

  let g:ale_run_synchronously = 1

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

After:
  Restore

  call ale#assert#TearDownLinterTest()

Given foobar (Some imaginary filetype):
Execute(It should be possible to compute an executable to check based on the result of commands):
  let b:ale_history = []

  AssertLinter 'foo', 'echo'

  ALELint
  call ale#test#FlushJobs()

  AssertEqual
  \ [{'status': 0, 'job_id': 'executable', 'command': 'foo'}],
  \ filter(copy(b:ale_history), 'v:val.job_id is# ''executable''')