public async Task Transfer_ValidAmounts_CreditAndDebitCorrectly()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountTransferCommandHandler(context, time);
await sut.Handle(new CreateAccountTransferCommand { AccountIdFrom = 1, AccountIdTo = 2, Amount = 250m }, CancellationToken.None);
// Assert
var accOne = context.Accounts.Single(a => a.AccountId == 1);
var accTwo = context.Accounts.Single(a => a.AccountId == 2);
accOne.Balance.ShouldBe(250m);
accTwo.Balance.ShouldBe(750m);
}
public async Task Transfer_NegativeAmount_ThrowsException()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountTransferCommandHandler(context, time);
//Assert
await Assert.ThrowsAsync <NegativeAmountException>(() =>
sut.Handle(new CreateAccountTransferCommand
{
AccountIdFrom = 1, AccountIdTo = 2, Amount = -200m
}, CancellationToken.None));
context.Accounts.Single(a => a.AccountId == 1).Balance.ShouldBe(500m);
}
public async Task Transfer_ValidAmounts_CreateTransactions()
{
// Arrange
IDateTime time = new MockDateTime();
var context = FakeContext.Get();
// Act
var sut = new CreateAccountTransferCommandHandler(context, time);
await sut.Handle(new CreateAccountTransferCommand { AccountIdFrom = 1, AccountIdTo = 2, Amount = 250m }, CancellationToken.None);
// Assert
var transactionFrom = context.Transactions.Single(t => t.AccountId == 1);
var transactionTo = context.Transactions.Single(t => t.AccountId == 2);
transactionFrom.Operation.ShouldBe(Operation.TransferDebit);
transactionFrom.Type.ShouldBe(TransactionType.Debit);
transactionFrom.Amount.ShouldBe(-250m);
transactionFrom.Balance.ShouldBe(250m);
transactionTo.Operation.ShouldBe(Operation.Transfer);
transactionTo.Type.ShouldBe(TransactionType.Credit);
transactionTo.Amount.ShouldBe(250m);
transactionTo.Balance.ShouldBe(750m);
}