Before:
  Save g:ale_cs_mcsc_options
  Save g:ale_cs_mcsc_source
  Save g:ale_cs_mcsc_assembly_path
  Save g:ale_cs_mcsc_assemblies
  Save g:ale_buffer_info

  let g:ale_buffer_info = {bufnr(''): {'temporary_file_list': []}}

  unlet! g:ale_cs_mcsc_options
  unlet! g:ale_cs_mcsc_source
  unlet! g:ale_cs_mcsc_assembly_path
  unlet! g:ale_cs_mcsc_assemblies

  function! GetCommand()
    let l:command = ale_linters#cs#mcsc#GetCommand(bufnr(''))
    let l:command = join(split(l:command))

    return substitute(l:command, ':[^ ]\+ -t:module', ':TEMP -t:module', '')
  endfunction

  runtime ale_linters/cs/mcsc.vim

After:
  Restore

  unlet! b:ale_cs_mcsc_options
  unlet! g:ale_cs_mcsc_source
  unlet! g:ale_cs_mcsc_assembly_path
  unlet! g:ale_cs_mcsc_assemblies

  delfunction GetCommand

  call ale#linter#Reset()

Execute(Check for proper default command):
  AssertEqual
  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

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

  AssertEqual
  \   'cd ".";mcs -unsafe ' . g:ale_cs_mcsc_options . ' -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

Execute(The souce path should be be used in the command):
  let g:ale_cs_mcsc_source='../foo/bar'

  AssertEqual
  \ 'cd "' . g:ale_cs_mcsc_source . '";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

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']

  AssertEqual
  \ 'cd ".";mcs -unsafe -lib:"' . join(g:ale_cs_mcsc_assembly_path,'","') . '" -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

  let g:ale_cs_mcsc_assembly_path = []

  AssertEqual
  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

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']

  AssertEqual
  \ 'cd ".";mcs -unsafe -r:"' . join(g:ale_cs_mcsc_assemblies,'","') . '" -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()

  let g:ale_cs_mcsc_assemblies = []

  AssertEqual
  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
  \ GetCommand()