public function testExists() { $elements = $this->getRandomElements(); foreach ($elements as $element) { $this->set->add($element); $this->assertTrue($this->set->contains($element)); } foreach ($elements as $element) { $this->assertTrue($this->set->exists($element)); } foreach ($elements as $element) { $this->set->remove($element); $this->assertFalse($this->set->exists($element)); } }