public function testAllowsEarlyExitFromDifferentPoints()
{
$visited = [];
$ast = Parser::parse('{ a { y }, b { x } }');
Visitor::visit($ast, Visitor::visitInParallel([['enter' => function ($node) use(&$visited) {
$value = isset($node->value) ? $node->value : null;
$visited[] = ['break-a', 'enter', $node->kind, $value];
if ($node->kind === 'Name' && $value === 'a') {
return Visitor::stop();
}
}, 'leave' => function ($node) use(&$visited) {
$visited[] = ['break-a', 'leave', $node->kind, isset($node->value) ? $node->value : null];
}], ['enter' => function ($node) use(&$visited) {
$value = isset($node->value) ? $node->value : null;
$visited[] = ['break-b', 'enter', $node->kind, $value];
if ($node->kind === 'Name' && $value === 'b') {
return Visitor::stop();
}
}, 'leave' => function ($node) use(&$visited) {
$visited[] = ['break-b', 'leave', $node->kind, isset($node->value) ? $node->value : null];
}]]));
$this->assertEquals([['break-a', 'enter', 'Document', null], ['break-b', 'enter', 'Document', null], ['break-a', 'enter', 'OperationDefinition', null], ['break-b', 'enter', 'OperationDefinition', null], ['break-a', 'enter', 'SelectionSet', null], ['break-b', 'enter', 'SelectionSet', null], ['break-a', 'enter', 'Field', null], ['break-b', 'enter', 'Field', null], ['break-a', 'enter', 'Name', 'a'], ['break-b', 'enter', 'Name', 'a'], ['break-b', 'leave', 'Name', 'a'], ['break-b', 'enter', 'SelectionSet', null], ['break-b', 'enter', 'Field', null], ['break-b', 'enter', 'Name', 'y'], ['break-b', 'leave', 'Name', 'y'], ['break-b', 'leave', 'Field', null], ['break-b', 'leave', 'SelectionSet', null], ['break-b', 'leave', 'Field', null], ['break-b', 'enter', 'Field', null], ['break-b', 'enter', 'Name', 'b']], $visited);
}