Before:
  call ale#assert#SetUpLinterTest('glsl', 'glslls')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default command should be correct):
  AssertLinter 'glslls', ale#Escape('glslls') . ' --stdin'

Execute(Executable should be configurable):
  let b:ale_glsl_glslls_executable = 'foobar'

  AssertLinter 'foobar', ale#Escape('foobar') . ' --stdin'

Execute(Setting logfile should work):
  let b:ale_glsl_glslls_logfile = '/tmp/test.log'

  AssertLinter 'glslls',
  \ ale#Escape('glslls') . ' --verbose -l /tmp/test.log --stdin'