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GiftCardServiceTests.cs

using FluentAssertions;
using Nop.Core.Domain.Orders;
using Nop.Services.Orders;
using NUnit.Framework;

namespace Nop.Tests.Nop.Services.Tests.Orders;

[TestFixture]
public class GiftCardServiceTests : ServiceTest
{
    private IGiftCardService _giftCardService;
    private GiftCard _giftCard1;
    private GiftCard _giftCard2;

    [OneTimeSetUp]
    public async Task SetUp()
    {
        _giftCardService = GetService();

        _giftCard1 = new GiftCard { Amount = 100, IsGiftCardActivated = true };
        _giftCard2 = new GiftCard { Amount = 100 };

        await _giftCardService.InsertGiftCardAsync(_giftCard1);
        await _giftCardService.InsertGiftCardAsync(_giftCard2);
    }

    [OneTimeTearDown]
    public async Task TearDown()
    {
        await _giftCardService.DeleteGiftCardAsync(_giftCard1);
        await _giftCardService.DeleteGiftCardAsync(_giftCard2);
    }

    [Test]
    public async Task CanValidateGiftCard()
    {
        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard1.Id, UsedWithOrderId = 1, UsedValue = 30 });

        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard1.Id, UsedWithOrderId = 1, UsedValue = 20 });

        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard1.Id, UsedWithOrderId = 1, UsedValue = 5 });

        //valid
        var isValid = await _giftCardService.IsGiftCardValidAsync(_giftCard1);
        isValid.Should().BeTrue();

        //mark as not active
        _giftCard1.IsGiftCardActivated = false;
        isValid = await _giftCardService.IsGiftCardValidAsync(_giftCard1);
        isValid.Should().BeFalse();

        //again active
        _giftCard1.IsGiftCardActivated = true;
        isValid = await _giftCardService.IsGiftCardValidAsync(_giftCard1);
        isValid.Should().BeTrue();

        //add usage history record
        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard1.Id, UsedWithOrderId = 1, UsedValue = 1000 });

        isValid = await _giftCardService.IsGiftCardValidAsync(_giftCard1);
        isValid.Should().BeFalse();
    }

    [Test]
    public async Task CanCalculateGiftCardRemainingAmount()
    {
        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard2.Id, UsedWithOrderId = 1, UsedValue = 30 });

        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard2.Id, UsedWithOrderId = 1, UsedValue = 20 });

        await _giftCardService.InsertGiftCardUsageHistoryAsync(
            new GiftCardUsageHistory { GiftCardId = _giftCard2.Id, UsedWithOrderId = 1, UsedValue = 5 });

        var remainingAmount = await _giftCardService.GetGiftCardRemainingAmountAsync(_giftCard2);
        remainingAmount.Should().Be(45);
    }
}