ANTOOZA-BACKEND/Tests/Application.Tests/FakeDanalPayService.cs

using Application.Abstractions.Payment;

namespace Application.Tests;

/// <summary>
/// IDanalPayService 수제 fake — PG 호출 횟수를 기록하고 설정된 결과/예외를 반환한다.
/// </summary>
internal sealed class FakeDanalPayService : IDanalPayService
{
    public DanalConfirmResult ConfirmResult { get; set; } = SuccessConfirm();
    public Exception? ConfirmException { get; set; }
    public DanalCancelResult CancelResult { get; set; } = SuccessCancel();
    public Exception? CancelException { get; set; }

    public int ConfirmCallCount { get; private set; }
    public int CancelCallCount { get; private set; }

    public Task<DanalClientConfig> GetClientConfigAsync(CancellationToken ct)
        => Task.FromResult(new DanalClientConfig("test-client-key", "MID-TEST"));

    public Task<DanalConfirmResult> ConfirmAsync(string method, string transactionID, string orderID, int amount, CancellationToken ct)
    {
        ConfirmCallCount++;

        if (ConfirmException is not null)
        {
            throw ConfirmException;
        }

        return Task.FromResult(ConfirmResult);
    }

    public Task<DanalCancelResult> CancelAsync(string method, string transactionID, int amount, string cancelType, CancellationToken ct)
    {
        CancelCallCount++;

        if (CancelException is not null)
        {
            throw CancelException;
        }

        return Task.FromResult(CancelResult);
    }

    public static DanalConfirmResult SuccessConfirm() => new(
        Success: true, Code: "0000", Message: "OK", TransactionID: "TX-OK", OrderName: "포인트 충전",
        TotalAmount: null, DiscountAmount: null, UserName: null,
        TransDate: null, TransTime: null,
        CardCode: null, CardName: null, CardNo: null,
        InstallmentMonths: null, ApproveNo: null,
        ApprovalDateTime: null, AuthKey: null,
        AccountNumber: null, BankCode: null, UserId: null, UserEmail: null,
        BankName: null, ExpireDate: null, ExpireTime: null,
        VirtualAccountNumber: null, UseCashReceipt: null);

    public static DanalConfirmResult FailConfirm(string code = "9999", string message = "승인 거절")
        => SuccessConfirm() with { Success = false, Code = code, Message = message };

    public static DanalCancelResult SuccessCancel() => new(
        Success: true, Code: "0000", Message: "OK", OriginalTransactionID: "TX-OK",
        CancelledAmount: null, TransDate: null, TransTime: null,
        Balance: null, RemainedAmount: null, ApprovalDateTime: null);
}