public function testUnionIntoNonOverlappingInterface()
{
$this->expectFailsRule(new PossibleFragmentSpreads(), '
fragment invalidUnionWithinInterface on Pet { ...humanOrAlienFragment }
fragment humanOrAlienFragment on HumanOrAlien { __typename }
', [$this->error('humanOrAlienFragment', 'Pet', 'HumanOrAlien', 2, 53)]);
}