/**
* It should sort and preserve order for unchanging comparisons.
*/
public function testSort()
{
$array = array(array('col1' => 20, 'col2' => 20), array('col1' => 20, 'col2' => 10), array('col1' => 10, 'col2' => 50), array('col1' => 10, 'col2' => 10), array('col1' => 10, 'col2' => 20));
$expected = array(array('col1' => 10, 'col2' => 50), array('col1' => 10, 'col2' => 10), array('col1' => 10, 'col2' => 20), array('col1' => 20, 'col2' => 20), array('col1' => 20, 'col2' => 10));
Sort::mergesort($array, function ($row1, $row2) {
return strcmp($row1['col1'], $row2['col1']);
});
$this->assertEquals($expected, $array);
}
