public async Task Interest_ApplyInterest_CreatesValidTransaction()
{
// Arrange
var context = FakeContext.Get();
var mockDateTime = new MockDateTime {
Now = DateTime.Today.AddDays(600).Date
};
var lastCalculatedDate = DateTime.Today.Date;
var account = context.Accounts.Single(a => a.AccountId == 5);
// Act
var sut = new ApplyInterestCommandHandler(context, mockDateTime);
await sut.Handle(new ApplyInterestsCommand { AccountId = 5, APR = 5, LastCalculatedDate = lastCalculatedDate }, CancellationToken.None);
// Assert
account.Transactions.Count.ShouldBe(1);
var transaction = context.Transactions.Single(t => t.AccountId == 5);
transaction.Balance.ShouldBe(108333.33m);
transaction.Amount.ShouldBe(8333.33m);
transaction.AccountId.ShouldBe(5);
transaction.Date.ShouldBe(mockDateTime.Now);
transaction.Operation.ShouldBe(Operation.Credit);
transaction.Type.ShouldBe(TransactionType.Credit);
transaction.Symbol.ShouldBe(Interest.Symbol);
}
public async Task Loan_ApplyInterest_CalculatedCorrectly()
{
// Arrange
var context = FakeContext.Get();
var mockDateTime = new MockDateTime {
Now = DateTime.Today.AddDays(60).Date
};
var lastCalculatedDate = DateTime.Today.Date;
var account = context.Accounts.Single(a => a.AccountId == 5);
// Act
var sut = new ApplyInterestCommandHandler(context, mockDateTime);
await sut.Handle(new ApplyInterestsCommand { AccountId = 5, APR = 5, LastCalculatedDate = lastCalculatedDate }, CancellationToken.None);
// Assert
account.Balance.ShouldBe(100833.33m);
}
public async Task Interest_ZeroBalance_ShouldNotApplyInterest()
{
// Arrange
var context = FakeContext.Get();
var mockDateTime = new MockDateTime {
Now = DateTime.Today.AddDays(200).Date
};
var calculatedDate = DateTime.Today.Date;
var account = context.Accounts.Single(a => a.AccountId == 5);
account.Balance = 0m;
context.SaveChanges();
// Act
var sut = new ApplyInterestCommandHandler(context, mockDateTime);
await sut.Handle(new ApplyInterestsCommand { AccountId = 5, APR = 5, LastCalculatedDate = calculatedDate }, CancellationToken.None);
// Assert
account.Balance.ShouldBe(0m);
account.Transactions.Count.ShouldBe(0);
}