Before:
  call ale#assert#SetUpLinterTest('sql', 'sqlfluff')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default sqlfluff command should be correct):
  AssertLinter 'sqlfluff',
  \    ale#Escape('sqlfluff')
  \    . ' lint --dialect ansi --format json  %t'

Execute(The sqlfluff executable and command should be configurable):
  let g:ale_sql_sqlfluff_executable = 'foobar'
  let g:ale_sql_sqlfluff_options = '--whatever'

  AssertLinter 'foobar',
  \    ale#Escape('foobar')
  \    . ' lint --dialect ansi --format json --whatever %t'