public void ListensToNestedProperties()
{
var viewModel = new MortgateCalculatorViewModel();
engine.Assign(() => viewModel.CanApply)
.From(() => !viewModel.PaymentSchedule.HasValidationError, e => { });
viewModel.RegeneratePaymentSchedule(hasValidationError: true);
Console.WriteLine(engine.ToDotFormat());
viewModel.CanApply.ShouldBe(false);
engineInstrumentation.AssertSetCount("viewModel.CanApply", 1);
viewModel.RegeneratePaymentSchedule(hasValidationError: false);
Console.WriteLine(engine.ToDotFormat());
viewModel.CanApply.ShouldBe(true);
engineInstrumentation.AssertSetCount("viewModel.CanApply", 2);
viewModel.PaymentSchedule.HasValidationError = true;
Console.WriteLine(engine.ToDotFormat());
viewModel.CanApply.ShouldBe(false);
engineInstrumentation.AssertSetCount("viewModel.CanApply", 3);
Console.WriteLine(engine.ToDotFormat());
}
public void LeafPropertiesShouldBeListenedTo()
{
var viewModel = new MortgateCalculatorViewModel();
viewModel.RegeneratePaymentSchedule(true);
engine.Assign(() => Foo)
.From(() => CalcSomethingToDoWithSchedule(viewModel.PaymentSchedule), e => { });
Console.WriteLine(engine.ToDotFormat(string.Empty));
Foo.ShouldNotBe(42);
viewModel.PaymentSchedule.HasValidationError = false;
Foo.ShouldBe(42);
engineInstrumentation.AssertSetCount("Foo", 1);
}
public void GetHarderNode()
{
var viewModel = new MortgateCalculatorViewModel();
viewModel.RegeneratePaymentSchedule(false);
Expression<Func<bool>> expr = () => viewModel.PaymentSchedule.HasValidationError;
var node = ExpressionParser.GetChildSources(expr).Single();
node.FullPath.ShouldBe("viewModel.PaymentSchedule.HasValidationError");
node.SourcePaths.Count.ShouldBe(1);
var paymentScheduleNode = node.SourcePaths[0];
paymentScheduleNode.FullPath.ShouldBe("viewModel.PaymentSchedule");
var rootNode = paymentScheduleNode.SourcePaths.Single();
rootNode.FullPath.ShouldBe("viewModel");
var thisNode = rootNode.SourcePaths.Single();
thisNode.FullPath.ShouldBe("this");
thisNode.SourcePaths.ShouldBeEmpty();
}
public void TracksNestedProperties()
{
var mortgateCalculator = new MortgateCalculatorViewModel();
mortgateCalculator.RegeneratePaymentSchedule(false);
engine
.Assign(() => Prop)
.From(() => mortgateCalculator.PaymentSchedule.HasValidationError, ex => { });
string dotFormat = engine.ToDotFormat("Foo");
Console.WriteLine(dotFormat);
mortgateCalculator.PaymentSchedule.HasValidationError = true;
engine.ValueHasChanged(mortgateCalculator.PaymentSchedule, "HasValidationError");
Prop.ShouldBe(true);
}