Before: call ale#assert#SetUpLinterTest('erlang', 'erlc') After: call ale#assert#TearDownLinterTest() Execute(The default command should be correct.): let g:cmd = ale_linters#erlang#erlc#GetCommand(bufnr('')) let g:regex = 'erlc.\+-o.\+%t' let g:matched = match(g:cmd, g:regex) " match returns -1 if not found AssertNotEqual \ g:matched, \ -1, \ 'Command error: expected [' . g:cmd . '] to match [' . g:regex . ']' Execute(The command should accept configured executable.): let b:ale_erlang_erlc_executable = '/usr/bin/erlc' let g:cmd = ale_linters#erlang#erlc#GetCommand(bufnr('')) let g:regex = '/usr/bin/erlc.\+-o.\+%t' let g:matched = match(g:cmd, g:regex) " match returns -1 if not found AssertNotEqual \ g:matched, \ -1, \ 'Command error: expected [' . g:cmd . '] to match [' . g:regex . ']' Execute(The command should accept configured options.): let b:ale_erlang_erlc_options = '-I include' let g:cmd = ale_linters#erlang#erlc#GetCommand(bufnr('')) let g:regex = 'erlc.\+-o.\+-I include.\+%t' let g:matched = match(g:cmd, g:regex) " match returns -1 if not found AssertNotEqual \ g:matched, \ -1, \ 'Command error: expected [' . g:cmd . '] to match [' . g:regex . ']'