Before: call ale#assert#SetUpLinterTest('cs', 'mcsc') After: call ale#assert#TearDownLinterTest() Execute(The mcsc linter should return the correct default command): AssertLinterCwd expand('%:p:h') AssertLinter 'mcs', 'mcs -unsafe -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') Execute(The options should be be used in the command): let g:ale_cs_mcsc_options = '-pkg:dotnet' AssertLinter 'mcs', 'mcs -unsafe -pkg:dotnet -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') Execute(The souce path should be be used in the command): let g:ale_cs_mcsc_source = '../foo/bar' AssertLinterCwd '../foo/bar' AssertLinter 'mcs', 'mcs -unsafe -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') Execute(The list of search pathes for assemblies should be be used in the command if not empty): let g:ale_cs_mcsc_assembly_path = ['/usr/lib/mono', '../foo/bar'] AssertLinter 'mcs', 'mcs -unsafe' \ . ' -lib:' . ale#Escape('/usr/lib/mono') . ',' . ale#Escape('../foo/bar') \ . ' -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') let g:ale_cs_mcsc_assembly_path = [] AssertLinter 'mcs', 'mcs -unsafe -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') Execute(The list of assemblies should be be used in the command if not empty): let g:ale_cs_mcsc_assemblies = ['foo.dll', 'bar.dll'] AssertLinter 'mcs', 'mcs -unsafe' \ . ' -r:' . ale#Escape('foo.dll') . ',' . ale#Escape('bar.dll') \ . ' -out:TEMP -t:module -recurse:' . ale#Escape('*.cs') let g:ale_cs_mcsc_assemblies = [] AssertLinter 'mcs', 'mcs -unsafe -out:TEMP -t:module -recurse:' . ale#Escape('*.cs')