Before:
  runtime autoload/ale/proselint.vim

  let b:ale_proselint_executable = 'proselint'

After:
  unlet! b:ale_proselint_executable

Execute(Command for proselint >= 0.16.0 should use 'check'):
  AssertEqual
  \ ale#Escape('proselint') . ' check %t',
  \ ale#proselint#GetCommand(bufnr(''), [0, 16, 0])

  AssertEqual
  \ ale#Escape('proselint') . ' check %t',
  \ ale#proselint#GetCommand(bufnr(''), [0, 17, 0])

Execute(Command for proselint < 0.16.0 should use standard arguments):
  AssertEqual
  \ ale#Escape('proselint') . ' %t',
  \ ale#proselint#GetCommand(bufnr(''), [0, 15, 0])

Execute(Command should respect custom executable path):
  let b:ale_proselint_executable = '/custom/path/to/proselint'

  AssertEqual
  \ ale#Escape('/custom/path/to/proselint') . ' check %t',
  \ ale#proselint#GetCommand(bufnr(''), [0, 16, 0])