public function testLinkTo()
{
$map = new \Bonder\Collections\Map();
$map->set('3', 'three');
$this->assertTrue($map->containsKey('3'));
$array = array('7' => 'seven', '19' => 'nineteen', '31' => 'thirty-one');
$map->linkTo($array);
$this->assertFalse($map->containsKey('3'));
$this->assertEquals(3, $map->size());
$map->remove('31');
$this->assertEquals(2, $map->size());
unset($array['19']);
$this->assertEquals(1, $map->size());
$this->assertTrue($map->isLinkedTo($array));
}
