|
| 1 | +using Banking.Application; |
| 2 | +using Banking.Domain; |
| 3 | + |
| 4 | +namespace Banking.Tests; |
| 5 | + |
| 6 | +public class TransferMoneyHandlerTests |
| 7 | +{ |
| 8 | + [Fact] |
| 9 | + public async Task HandleAsync_WhenFundsAreAvailable_MovesMoneyAndSavesOnce() |
| 10 | + { |
| 11 | + var alice = Account.Open("Alice", 100m); |
| 12 | + var bob = Account.Open("Bob", 50m); |
| 13 | + var transfers = new FakeTransferRepository(); |
| 14 | + var unitOfWork = new FakeUnitOfWork(); |
| 15 | + var handler = new TransferMoneyHandler( |
| 16 | + new FakeAccountRepository(new() { [1] = alice, [2] = bob }), transfers, unitOfWork); |
| 17 | + |
| 18 | + var result = await handler.HandleAsync( |
| 19 | + new TransferMoneyCommand(1, 2, 30m, "TR-1"), TestContext.Current.CancellationToken); |
| 20 | + |
| 21 | + Assert.True(result.IsSuccess); |
| 22 | + Assert.Equal(70m, alice.Balance); |
| 23 | + Assert.Equal(80m, bob.Balance); |
| 24 | + Assert.Single(transfers.Added); |
| 25 | + Assert.Equal(1, unitOfWork.SaveCount); |
| 26 | + } |
| 27 | + |
| 28 | + [Fact] |
| 29 | + public async Task HandleAsync_WhenFundsAreShort_SavesNothing() |
| 30 | + { |
| 31 | + var alice = Account.Open("Alice", 100m); |
| 32 | + var bob = Account.Open("Bob", 50m); |
| 33 | + var transfers = new FakeTransferRepository(); |
| 34 | + var unitOfWork = new FakeUnitOfWork(); |
| 35 | + var handler = new TransferMoneyHandler( |
| 36 | + new FakeAccountRepository(new() { [1] = alice, [2] = bob }), transfers, unitOfWork); |
| 37 | + |
| 38 | + var result = await handler.HandleAsync( |
| 39 | + new TransferMoneyCommand(1, 2, 500m, "TR-2"), TestContext.Current.CancellationToken); |
| 40 | + |
| 41 | + Assert.False(result.IsSuccess); |
| 42 | + Assert.Equal("Account.InsufficientFunds", result.Error!.Code); |
| 43 | + Assert.Equal(100m, alice.Balance); |
| 44 | + Assert.Empty(transfers.Added); |
| 45 | + Assert.Equal(0, unitOfWork.SaveCount); |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +internal sealed class FakeAccountRepository(Dictionary<int, Account> accounts) : IAccountRepository |
| 50 | +{ |
| 51 | + public Task<Account?> GetByIdAsync(int accountId, CancellationToken cancellationToken = default) => |
| 52 | + Task.FromResult(accounts.GetValueOrDefault(accountId)); |
| 53 | +} |
| 54 | + |
| 55 | +internal sealed class FakeTransferRepository : ITransferRepository |
| 56 | +{ |
| 57 | + public List<Transfer> Added { get; } = []; |
| 58 | + |
| 59 | + public void Add(Transfer transfer) => Added.Add(transfer); |
| 60 | +} |
| 61 | + |
| 62 | +internal sealed class FakeUnitOfWork : IUnitOfWork |
| 63 | +{ |
| 64 | + public int SaveCount { get; private set; } |
| 65 | + |
| 66 | + public Task SaveChangesAsync(CancellationToken cancellationToken = default) |
| 67 | + { |
| 68 | + SaveCount++; |
| 69 | + return Task.CompletedTask; |
| 70 | + } |
| 71 | +} |
0 commit comments