public function testCanSortKeys()
 {
     $under = Arrays::sortKeys(array('z' => 0, 'b' => 1, 'r' => 2));
     $this->assertEquals(array('b' => 1, 'r' => 2, 'z' => 0), $under);
     $under = Arrays::sortKeys(array('z' => 0, 'b' => 1, 'r' => 2), 'desc');
     $this->assertEquals(array('z' => 0, 'r' => 2, 'b' => 1), $under);
 }
 public function testCanSortKeys()
 {
     $under = Arrays::sortKeys(['z' => 0, 'b' => 1, 'r' => 2]);
     $this->assertEquals(['b' => 1, 'r' => 2, 'z' => 0], $under);
     $under = Arrays::sortKeys(['z' => 0, 'b' => 1, 'r' => 2], 'desc');
     $this->assertEquals(['z' => 0, 'r' => 2, 'b' => 1], $under);
 }