Before:
  Save g:ale_verilog_iverilog_options

  unlet! g:ale_verilog_iverilog_options

  runtime ale_linters/verilog/iverilog.vim

After:
  Restore

  call ale#linter#Reset()

Execute(The default iverilog command should be correct):
  AssertEqual
  \ 'iverilog -t null -Wall  %t',
  \ ale_linters#verilog#iverilog#GetCommand(bufnr(''))

Execute(iverilog options should be configurable):
  " Additional args for the linter
  let g:ale_verilog_iverilog_options = '-y.'

  AssertEqual
  \ 'iverilog -t null -Wall -y. %t',
  \ ale_linters#verilog#iverilog#GetCommand(bufnr(''))