assertNull($order->getId()); $this->assertSame('04/2026-00001', $order->getNumOrder()); $this->assertInstanceOf(\DateTimeImmutable::class, $order->getCreatedAt()); $this->assertFalse($order->isUsed()); } public function testMarkAsUsed(): void { $order = new OrderNumber('04/2026-00002'); $this->assertFalse($order->isUsed()); $order->markAsUsed(); $this->assertTrue($order->isUsed()); } public function testMarkAsUnused(): void { $order = new OrderNumber('04/2026-00003'); $order->markAsUsed(); $this->assertTrue($order->isUsed()); $order->markAsUnused(); $this->assertFalse($order->isUsed()); } }