public void ParentPropertyUpdatesTriggerValueChangesInTentativeProperty()
{
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
parent.Value = 2;
tentativeProperty.Value.Should().Be(2);
}
public void SettingValueChangesPropertyValue()
{
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.Value.Should().Be(1, "before setting");
tentativeProperty.Value = 2;
tentativeProperty.Value.Should().Be(2, "after setting");
}
public void SettingValueToSameValueDoesNotFireChangeEvents()
{
bool eventFired = false;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.PropertyChanged += delegate { eventFired = true; };
tentativeProperty.Value = 1;
eventFired.Should().BeFalse("value set to existing value");
}
public void SettingValueFiresChangeEvents()
{
bool eventFired = false;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.PropertyChanged += delegate { eventFired = true; };
tentativeProperty.Value = 2;
eventFired.Should().BeTrue();
}
public void ParentPropertyUpdatesTriggerChangeEventsInTentativeProperty()
{
bool eventTriggered = false;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.PropertyChanged += delegate { eventTriggered = true; };
parent.Value = 2;
eventTriggered.Should().BeTrue();
}
public Task SettingValueRevertsToParentValueAfterDuration()
{
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.Value.Should().Be(1, "before setting temporary value");
tentativeProperty.Value = 2;
tentativeProperty.Value.Should().Be(2, "directly after setting temporary value");
return(Task.Delay(longDuration).ContinueWith(task => tentativeProperty.Value.Should().Be(1, "after waiting temporary value to revert to parent value")));
}
private void tentativeProperty()
{
var backing = new StoredProperty <int>(8);
var tentative = new TentativeProperty <int>(backing, TimeSpan.FromMilliseconds(500));
Console.WriteLine(tentative.Value); // 8
backing.Value = 9;
Console.WriteLine(tentative.Value); // 9
tentative.Value = 10;
backing.Value = 11;
Console.WriteLine(tentative.Value); // 10
Thread.Sleep(1000);
Console.WriteLine(tentative.Value); // 11
}
public void SettingSecondTemporaryValueExtendsDurationUntilValueReverts()
{
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.Value.Should().Be(1, "before setting temporary value");
tentativeProperty.Value = 2;
Thread.Sleep(shortDuration * 0.8);
tentativeProperty.Value = 3;
Thread.Sleep(shortDuration * 0.8);
tentativeProperty.Value.Should().Be(3, "should not have reverted because we set a tentative value recently");
Thread.Sleep(shortDuration * 0.5);
tentativeProperty.Value.Should().Be(1, "enough time has passed that the property should have reverted to its parent value");
}
public void SettingValueFiresEventsWhenReverting()
{
int eventsFired = 0;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.Value.Should().Be(1, "before setting temporary value");
tentativeProperty.PropertyChanged += delegate { eventsFired++; };
tentativeProperty.Value = 2;
tentativeProperty.Value.Should().Be(2, "directly after setting temporary value");
eventsFired.Should().Be(1, "changed once, to temporary value");
Thread.Sleep(longDuration);
eventsFired.Should().Be(2, "changed once, to and from temporary value");
tentativeProperty.Value.Should().Be(1, "after waiting temporary value to revert to parent value");
}
public void DisposingPropertyCancelsReverts()
{
int eventsFired = 0;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.PropertyChanged += delegate { eventsFired++; };
tentativeProperty.Value = 2;
eventsFired.Should().Be(1, "one change event from explicitly setting value");
// Thread.Sleep(shortDuration * 0.8);
tentativeProperty.Dispose();
Thread.Sleep(longDuration);
tentativeProperty.Value.Should().Be(2, "value should not have reverted because we disposed the property because it could happen");
eventsFired.Should().Be(1, "value should not have reverted because we disposed the property because it could happen");
}
public void SettingTemporaryValuesFiresEventsWhenReverting()
{
int eventsFired = 0;
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.PropertyChanged += delegate { eventsFired++; };
tentativeProperty.Value = 2;
eventsFired.Should().Be(1, "after setting once");
Thread.Sleep(shortDuration * 0.8);
eventsFired.Should().Be(1, "has not yet reverted yet");
tentativeProperty.Value = 3;
Thread.Sleep(shortDuration * 0.8);
eventsFired.Should().Be(2, "has been set a second time, but didn't revert yet");
Thread.Sleep(shortDuration * 0.4);
eventsFired.Should().Be(3, "should have reverted from second temporary value to parent value");
tentativeProperty.Value.Should().Be(1, "value should have reverted");
}
public void InitialValueFromParent()
{
var tentativeProperty = new TentativeProperty <int>(parent, shortDuration);
tentativeProperty.Value.Should().Be(1);
}