Before: let g:ale_javascript_eslint_executable = 'eslint_d' call ale#test#SetDirectory('/testplugin/test') runtime ale_linters/javascript/eslint.vim After: let g:ale_has_override = {} let g:ale_javascript_eslint_executable = 'eslint' let g:ale_javascript_eslint_use_global = 0 call ale#test#RestoreDirectory() call ale#linter#Reset() Execute(create-react-app directories should be detected correctly): call ale#test#SetFilename('eslint-test-files/react-app/subdir/testfile.js') AssertEqual \ ale#path#Simplify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'), \ ale#handlers#eslint#GetExecutable(bufnr('')) Execute(use-global should override create-react-app detection): let g:ale_javascript_eslint_use_global = 1 call ale#test#SetFilename('eslint-test-files/react-app/subdir/testfile.js') AssertEqual \ 'eslint_d', \ ale#handlers#eslint#GetExecutable(bufnr('')) Execute(other app directories should be detected correctly): call ale#test#SetFilename('eslint-test-files/other-app/subdir/testfile.js') AssertEqual \ ale#path#Simplify(g:dir . '/eslint-test-files/node_modules/.bin/eslint'), \ ale#handlers#eslint#GetExecutable(bufnr('')) Execute(use-global should override other app directories): let g:ale_javascript_eslint_use_global = 1 call ale#test#SetFilename('eslint-test-files/other-app/subdir/testfile.js') AssertEqual \ 'eslint_d', \ ale#handlers#eslint#GetExecutable(bufnr('')) Execute(eslint_d should be detected correctly): call ale#test#SetFilename('eslint-test-files/app-with-eslint-d/testfile.js') AssertEqual \ ale#path#Simplify(g:dir . '/eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'), \ ale#handlers#eslint#GetExecutable(bufnr('')) Execute(eslint.js executables should be run with node on Windows): call ale#test#SetFilename('eslint-test-files/react-app/subdir/testfile.js') let g:ale_has_override['win32'] = 1 " We have to execute the file with node. AssertEqual \ ale#Escape('node.exe') . ' ' \ . ale#Escape(ale#path#Simplify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js')) \ . ' -f unix --stdin --stdin-filename %s', \ ale#handlers#eslint#GetCommand(bufnr(''))