/**
* Tests contains
*
* @return void
*/
public function testContains()
{
$items = ['a' => 1, 'b' => 2, 'c' => 3];
$collection = new Collection($items);
$this->assertTrue($collection->contains(2));
$this->assertTrue($collection->contains(1));
$this->assertFalse($collection->contains(10));
$this->assertFalse($collection->contains('2'));
}
