Before:
  call ale#assert#SetUpLinterTest('rust', 'rls')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default executable path should be correct):
  AssertLinter 'rls', ale#Escape('rls') . ' +' . ale#Escape('nightly')

Execute(The toolchain should be configurable):
  let g:ale_rust_rls_toolchain = 'stable'

  AssertLinter 'rls', ale#Escape('rls') . ' +' . ale#Escape('stable')

Execute(The toolchain should be ommitted if not given):
  let g:ale_rust_rls_toolchain = ''

  AssertLinter 'rls', ale#Escape('rls')

Execute(The project root should be detected correctly):
  AssertLSPProject ''

  call ale#test#SetFilename('rust-rls-project/test.rs')

  AssertLSPProject ale#path#Simplify(g:dir . '/rust-rls-project')