public void MutableValueShouldReturnValuePassedToConstructor()
{
var value = new MutableValue <int>(10);
var changedValues = new List <int>();
var changedCompleted = false;
value.Changed.Subscribe((v) => changedValues.Add(v), () => changedCompleted = true);
value.GetValue().Should().Be(10);
changedValues.Count.Should().Be(1);
changedValues[0].Should().Be(10);
changedCompleted.Should().BeFalse();
}
public void ObservableValueShouldNotChangeWhenSetToValueItAlreadyHas()
{
var value = new MutableValue <int>(10);
var changedValues = new List <int>();
var changedCompleted = false;
value.Changed.Subscribe((v) => changedValues.Add(v), () => changedCompleted = true);
value.SetValue(10);
value.GetValue().Should().Be(10);
changedValues.Count.Should().Be(1);
changedValues[0].Should().Be(10);
changedCompleted.Should().BeFalse();
}
public void ObservableValueShouldNotChangeWhenSetToValueThatFailsValidation()
{
var value = new MutableValue <int>(10, v => v != 20);
var changedValues = new List <int>();
var changedCompleted = false;
value.Changed.Subscribe((v) => changedValues.Add(v), () => changedCompleted = true);
Action setter = () => value.SetValue(20);
setter.ShouldThrow <InvalidOperationException>();
value.GetValue().Should().Be(10);
changedValues.Count.Should().Be(1);
changedValues[0].Should().Be(10);
changedCompleted.Should().BeFalse();
}