public function testRemoveAll() { // Remove the following lines when you implement this test. $list = new ArrayList(); $list->add(1); $list->add(2); $this->assertTrue($this->object->removeAll($list)); $this->assertTrue($this->object->count() == 8); $list = new ArrayList(); $list->add(1); $list->add(7852); $this->assertFalse($this->object->removeAll($list)); $this->assertTrue($this->object->count() == 8); }