public void Should_Return_Zero_If_Initialised_With_Negative_Balance()
{
var service = new LevyBalanceService();
service.Initialise(-50, 0);
service.TryFund(50).Should().Be(0);
}
public void Should_Allow_Levy_Funding_After_Transfer_Funds_Have_Been_Spent()
{
var service = new LevyBalanceService();
service.Initialise(75, 50);
service.TryFundTransfer(50).Should().Be(50);
service.TryFund(25).Should().Be(25);
}
public void Should_Debit_Transfer_Allowance_When_Levy_Balance_Is_Under_Allowance()
{
var service = new LevyBalanceService();
service.Initialise(50, 50);
service.TryFund(50).Should().Be(50);
service.TryFundTransfer(50).Should().Be(0);
}
public void Should_Credit_Transfer_Refunds_To_Levy_Balance()
{
var service = new LevyBalanceService();
service.Initialise(0, 0);
service.TryFundTransfer(-50).Should().Be(-50);
service.TryFund(50).Should().Be(50);
}
public void TestInitialise()
{
var service = new LevyBalanceService();
service.Initialise(100, 50);
var funded = service.TryFund(50);
funded.Should().Be(50);
funded = service.TryFund(100);
funded.Should().Be(50);
funded = service.TryFund(1);
funded.Should().Be(0);
funded = service.TryFund(-10);
funded.Should().Be(-10);
funded = service.TryFund(20);
funded.Should().Be(10);
}
public void Should_Not_Allow_Levy_Funding_If_All_Levy_Spent_On_Transfers()
{
var service = new LevyBalanceService();
service.Initialise(75, 75);
service.TryFundTransfer(50).Should().Be(50);
service.TryFundTransfer(25).Should().Be(25);
service.TryFund(25).Should().Be(0);
}
public void Should_Throw_If_Tries_To_Use_TryFund_If_Not_Intialised()
{
var service = new LevyBalanceService();
Assert.Throws <InvalidOperationException>(() => service.TryFund(50));
}