Before:
  call ale#assert#SetUpLinterTest('perl', 'perl')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default Perl command callback should be correct):
  AssertLinter 'perl', ale#Escape('perl') . ' -c -Mwarnings -Ilib %t'

Execute(Overriding the executable and command should work):
  let b:ale_perl_perl_executable = 'foobar'
  let b:ale_perl_perl_options = '-w'

  AssertLinter 'foobar', ale#Escape('foobar') . ' -w %t'
  unlet b:ale_perl_perl_executable
  unlet b:ale_perl_perl_options
