public function testContains()
{
$map = new \Bonder\Collections\Map();
$map->set("mykey", 79);
$map->set("mykey2", 80);
$otherMap = new \Bonder\Collections\Map();
$this->assertTrue($map->contains($otherMap));
$otherMap->set("mykey", 79);
$this->assertTrue($map->contains($otherMap));
$otherMap->set("mykey3", 81);
$this->assertFalse($map->contains($otherMap));
$this->assertFalse($otherMap->contains($map));
$map->remove("mykey2");
$this->assertTrue($otherMap->contains($map));
$map->set("mykey", "old_79");
$this->assertFalse($otherMap->contains($map));
}