public function test()
{
$this->assertTrue(truthy([]));
$this->assertTrue(truthy(new ArrayIterator([])));
$this->assertTrue(truthy($this->trueArray));
$this->assertTrue(truthy($this->trueIterator));
$this->assertTrue(truthy($this->trueHash));
$this->assertTrue(truthy($this->trueHashIterator));
$this->assertFalse(truthy($this->falseArray));
$this->assertFalse(truthy($this->falseIterator));
$this->assertFalse(truthy($this->falseHash));
$this->assertFalse(truthy($this->falseHashIterator));
}