function testTransformsApplyPerIndex()
{
$query = new Search_Query('Hello');
$query->applyTransform(new Search\Federated\UrlPrefixTransform('http://foo.example.com'));
$sub = new Search_Query('Hello');
$sub->applyTransform(new Search\Federated\UrlPrefixTransform('http://bar.example.com/'));
$query->includeForeign('test_index_c', $sub);
$result = $query->search($this->indexA);
$urls = [$result[0]['url'], $result[1]['url']];
$this->assertContains('http://foo.example.com/PageA', $urls);
$this->assertContains('http://bar.example.com/PageC', $urls);
}