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