Before:
  call ale#assert#SetUpLinterTest('verilog', 'slang')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default slang command should be correct):
  AssertLinter 'slang', 'slang -Weverything -I%s:h  %t'

Execute(slang options should be configurable):
  " Additional args for the linter
  let g:ale_verilog_slang_options = '--define-macro DWIDTH=12'

  AssertLinter 'slang', 'slang -Weverything -I%s:h --define-macro DWIDTH=12 %t'