public function testConcat()
{
$this->coll->add(1)->add(2)->add(4);
$coll2 = new ArrayList([3]);
$this->coll->concat($coll2);
$this->assertEquals([1, 2, 4, 3], $this->coll->toArray());
$coll3 = new Dictionary(['key1' => 'value1', 'key2' => 'wrongValue']);
$coll4 = new Dictionary(['key2' => 'value2']);
$coll3->concat($coll4);
$this->assertEquals(['key1' => 'value1', 'key2' => 'value2'], $coll3->toArray());
}
public function testSortByKey()
{
$this->coll->add('testing');
$this->coll->sortByKey();
$this->assertTrue(is_array($this->coll->toArray()));
}
