import { Queue } from './Queue';

describe('Queue', function() {
	it('Should init a new Queue', function() {
		const queue = new Queue();
		expect(queue).not.toBeNull();
		expect(queue.size).toBe(0);
	});

	it('Should add new itens to the Queue', function() {
		const queue = new Queue();
		queue.enqueue('a');
		queue.enqueue('b');
		queue.enqueue('c');
		expect(queue.isEmpty).toBe(false);
		expect(queue.size).toBe(3);
		expect(queue.front).toBe('a');
	});

	it('Should dequeue correctly', function() {
		const queue = new Queue();
		queue.enqueue('a');
		queue.enqueue('b');
		queue.enqueue('c');
		expect(queue.dequeue()).toBe('a');
		expect(queue.size).toBe(2);
		expect(queue.front).toBe('b');
	});
});