function testIntegratedQueryUnion()
{
$numbers = new qinq\Collection([1, 2, 5, 7, 7]);
$union = new qinq\Collection([2, 2, 3, 5]);
$matches = [1, 2, 3, 5, 7];
foreach ($numbers->union($union) as $number) {
$match = array_shift($matches);
$this->assertEquals($match, $number);
}
}