Before:
  call ale#assert#SetUpLinterTest('go', 'gotype')
  call ale#test#SetFilename('../go_files/testfile2.go')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default gotype command should be correct):
  AssertLinter 'gotype',
  \ ale#path#CdString(expand('%:p:h')) . ' gotype -e .'

Execute(The gotype callback should ignore test files):
  call ale#test#SetFilename('bla_test.go')

  AssertLinter 'gotype', ''