function getPowerSetCombinations($values)
{
$combiner = new VF_Import_ArrayCombiner();
$combiner->setTraits($values);
$combinations = $combiner->getCombinations();
// put them back in correct order (root through leaf level)
foreach ($combinations as $key => $combination) {
$combinations[$key] = array();
foreach ($this->getSchema()->getLevels() as $level) {
$combinations[$key][$level] = trim($combination[$level]);
}
}
return $combinations;
}
function test()
{
$traits = array('make' => array(1, 2), 'model' => array(1, 2), 'year' => array(1, 2));
$combiner = new VF_Import_ArrayCombiner();
$combiner->setTraits($traits);
$r = $combiner->getCombinations();
$this->assertEquals(8, count($r));
$this->assertEquals(array('make' => 1, 'model' => 1, 'year' => 1), $r[0]);
$this->assertEquals(array('make' => 1, 'model' => 1, 'year' => 2), $r[1]);
$this->assertEquals(array('make' => 1, 'model' => 2, 'year' => 1), $r[2]);
$this->assertEquals(array('make' => 1, 'model' => 2, 'year' => 2), $r[3]);
$this->assertEquals(array('make' => 2, 'model' => 1, 'year' => 1), $r[4]);
$this->assertEquals(array('make' => 2, 'model' => 1, 'year' => 2), $r[5]);
$this->assertEquals(array('make' => 2, 'model' => 2, 'year' => 1), $r[6]);
$this->assertEquals(array('make' => 2, 'model' => 2, 'year' => 2), $r[7]);
}
