Before: call ale#assert#SetUpLinterTest('javascript', 'tsserver') After: call ale#assert#TearDownLinterTest() Execute(The default command should be correct): AssertLinter 'tsserver', ale#Escape('tsserver') Execute(should resolve correct path when nested 1): call ale#test#SetFilename('../test-files/tsserver/src/level-1/level-2/file3.ts') AssertLSPProject ale#path#Simplify(g:dir . '/../test-files/tsserver/src/level-1') Execute(should resolve correct path when nested 2): call ale#test#SetFilename('../test-files/tsserver/src/file1.ts') AssertLSPProject ale#path#Simplify(g:dir . '/../test-files/tsserver')