public function testUnionIntoNonOverlappingUnion()
{
$this->expectFailsRule(new PossibleFragmentSpreads(), '
fragment invalidUnionWithinUnion on CatOrDog { ...humanOrAlienFragment }
fragment humanOrAlienFragment on HumanOrAlien { __typename }
', [$this->error('humanOrAlienFragment', 'CatOrDog', 'HumanOrAlien', 2, 54)]);
}