Before: Save g:ale_writegood_options Save g:ale_writegood_executable Save g:ale_writegood_use_global unlet! g:ale_writegood_options unlet! g:ale_writegood_executable unlet! g:ale_writegood_use_global call ale#test#SetDirectory('/testplugin/test/command_callback') call ale#test#SetFilename('testfile.txt') call ale#handlers#writegood#ResetOptions() After: Restore call ale#test#RestoreDirectory() Execute(The global executable should be used when the local one cannot be found): AssertEqual 'write-good', ale#handlers#writegood#GetExecutable(bufnr('')) AssertEqual \ ale#Escape('write-good') . ' %t', \ ale#handlers#writegood#GetCommand(bufnr('')) Execute(The options should be used in the command): let g:ale_writegood_options = '--foo --bar' AssertEqual \ ale#Escape('write-good') . ' --foo --bar %t', \ ale#handlers#writegood#GetCommand(bufnr('')) Execute(Should use the node_modules/.bin executable, if available): call ale#test#SetFilename('write-good-node-modules/test.txt') AssertEqual \ ale#path#Winify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good'), \ ale#handlers#writegood#GetExecutable(bufnr('')) AssertEqual \ ale#Escape(ale#path#Winify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good')) \ . ' %t', \ ale#handlers#writegood#GetCommand(bufnr('')) Execute(Should use the node_modules/write-good executable, if available): call ale#test#SetFilename('write-good-node-modules-2/test.txt') AssertEqual \ ale#path#Winify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js'), \ ale#handlers#writegood#GetExecutable(bufnr('')) AssertEqual \ (has('win32') ? 'node' : '') \ . ale#Escape(ale#path#Winify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js')) \ . ' %t', \ ale#handlers#writegood#GetCommand(bufnr('')) Execute(Should let users configure a global executable and override local paths): call ale#test#SetFilename('write-good-node-modules-2/test.txt') let g:ale_writegood_executable = 'foo-bar' let g:ale_writegood_use_global = 1 AssertEqual 'foo-bar', ale#handlers#writegood#GetExecutable(bufnr('')) AssertEqual \ ale#Escape('foo-bar') . ' %t', \ ale#handlers#writegood#GetCommand(bufnr(''))