public void adding_an_item_updates_the_current()
{
var model = new DoubleCollectionModel();
var observer = model.CreateObserver();
model.Add(1d);
Assert.Equal(1d, model.Current);
model.Add(2d);
Assert.Equal(2d, model.Current);
Assert.Equal(2, observer.GetChangeCount(x => x.Current));
}
public void adding_an_item_updates_the_current_delta_type_if_it_has_changed()
{
var model = new DoubleCollectionModel();
var observer = model.CreateObserver();
model.Add(1d);
Assert.Equal(DeltaType.None, model.CurrentDeltaType);
model.Add(2d);
Assert.Equal(DeltaType.Increase, model.CurrentDeltaType);
model.Add(1d);
Assert.Equal(DeltaType.Decrease, model.CurrentDeltaType);
model.Add(1d);
Assert.Equal(DeltaType.None, model.CurrentDeltaType);
Assert.Equal(3, observer.GetChangeCount(x => x.CurrentDeltaType));
}
public void adding_an_item_updates_the_maximum_if_it_has_changed()
{
var model = new DoubleCollectionModel();
var observer = model.CreateObserver();
for(double item = -5d; item < 5d; ++item)
{
model.Add(item);
Assert.Equal(item, model.Maximum);
model.Add(item - 1);
Assert.Equal(item, model.Maximum);
}
Assert.Equal(10, observer.GetChangeCount(x => x.Maximum));
}
public void adding_an_item_updates_the_standard_deviation()
{
var model = new DoubleCollectionModel();
var observer = model.CreateObserver();
for(double item = 0d; item < 10d; ++item)
{
model.Add(item);
}
Assert.Equal(2.8722813232690143, model.StandardDeviation);
Assert.Equal(10, observer.GetChangeCount(x => x.StandardDeviation));
}
public void adding_an_item_updates_the_range()
{
var model = new DoubleCollectionModel();
var observer = model.CreateObserver();
model.Add(1d);
Assert.Equal(0d, model.Range);
model.Add(10d);
Assert.Equal(9d, model.Range);
Assert.Equal(2, observer.GetChangeCount(x => x.Range));
model = new DoubleCollectionModel();
observer = model.CreateObserver();
model.Add(-20);
Assert.Equal(0d, model.Range);
model.Add(-10);
Assert.Equal(10d, model.Range);
model.Add(0d);
Assert.Equal(20d, model.Range);
model.Add(10d);
Assert.Equal(30d, model.Range);
Assert.Equal(4, observer.GetChangeCount(x => x.Range));
}