public async Task Withdrawal_ValidWithdrawal_Debited()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountDebitCommandHandler(context, time);
await sut.Handle(new CreateAccountDebitCommand { AccountId = 4, Amount = 250.145612m }, CancellationToken.None);
// Assert
var account = await context.Accounts.Include(a => a.Transactions).SingleOrDefaultAsync(a => a.AccountId == 4);
account.Balance.ShouldBe(249.85m);
}
public async Task Withdrawal_MoreThanBalance_ThrowsException()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountDebitCommandHandler(context, time);
// Assert
await Assert.ThrowsAsync <InsufficientFundsException>(() =>
sut.Handle(new CreateAccountDebitCommand {
AccountId = 1, Amount = 501m
}, CancellationToken.None));
context.Accounts.Single(a => a.AccountId == 1).Balance.ShouldBe(500m);
}
public async Task Withdrawal_NegativeAmount_ThrowsException()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Arrange
var sut = new CreateAccountDebitCommandHandler(context, time);
// Assert
await Assert.ThrowsAsync <NegativeAmountException>
(() => sut.Handle(new CreateAccountDebitCommand()
{
AccountId = 1, Amount = -500m
}, CancellationToken.None));
context.Accounts.Single(a => a.AccountId == 1).Balance.ShouldBe(500m);
}
public async Task Withdrawal_Transaction_Created()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountDebitCommandHandler(context, time);
await sut.Handle(new CreateAccountDebitCommand { AccountId = 3, Amount = 250m }, CancellationToken.None);
// Assert
var transaction = await context.Transactions.SingleOrDefaultAsync(t => t.AccountId == 3);
transaction.Amount.ShouldBe(-250m);
transaction.AccountId.ShouldBe(3);
transaction.Operation.ShouldBe(Operation.Withdrawal);
transaction.Type.ShouldBe(TransactionType.Debit);
}