public function testUsesTheOnlyOperationIfNoOperationIsProvided()
{
$doc = 'query Example { a }';
$data = ['a' => 'b'];
$ast = Parser::parse($doc);
$schema = new Schema(['query' => new ObjectType(['name' => 'Type', 'fields' => ['a' => ['type' => Type::string()]]])]);
$ex = Executor::execute($schema, $ast, $data);
$this->assertEquals(['data' => ['a' => 'b']], $ex->toArray());
}