Before: call ale#assert#SetUpLinterTest('r', 'languageserver') After: call ale#assert#TearDownLinterTest() Execute(The default executable path should be correct): AssertLinter 'Rscript', 'Rscript --vanilla -e ' . ale#Escape('languageserver::run()') Execute(The project root should be detected correctly): AssertLSPProject '.' call ale#test#SetFilename('r_paths/dummy/test.R') AssertLSPProject ale#path#Simplify(g:dir . '/r_paths') Execute(Should accept configuration settings): AssertLSPConfig {} let b:ale_r_languageserver_options = {'r': {'lsp': {'debug': 'true', 'diagnostics': 'true'}}} AssertLSPConfig {'r': {'lsp': {'debug': 'true', 'diagnostics': 'true'}}}