Before:
  call ale#assert#SetUpLinterTest('cs', 'mcs')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default command should be correct):
  AssertLinter 'mcs', 'mcs -unsafe --parse %t'

Execute(The options should be be used in the command):
  let b:ale_cs_mcs_options = '-pkg:dotnet'

  AssertLinter 'mcs', 'mcs -unsafe --parse -pkg:dotnet %t'