public async Task AcquireOrderShouldWorkProperly()
{
var orderRepository = new Mock <IRepository <Order> >();
orderRepository.Setup(x => x.All()).Returns(this.DummyDataOrders().AsQueryable());
var orderStatusRepository = new Mock <IRepository <OrderStatus> >();
orderStatusRepository.Setup(x => x.All()).Returns(this.DummyDataOrderStatuses().AsQueryable());
var orderService = new OrderService(orderRepository.Object, orderStatusRepository.Object, null, null);
var actualResult = await orderService.AcquiredOrder("1");
Assert.True(actualResult == true, "AcquiredOrder should return true upon successfully changing the status of the order.");
orderRepository.Verify(x => x.All(), Times.Once, "All method of Order Repository should be called once.");
orderStatusRepository.Verify(x => x.All(), Times.Once, "All method of Order Status Repository should be called once.");
orderRepository.Verify(x => x.Update(It.IsAny <Order>()), Times.Once, "Update method of Order Repository should be called once.");
orderRepository.Verify(x => x.SaveChangesAsync(), Times.Once, "SaveChangesAsync method of Order Repository should be called once.");
}