public void CombinatorCombinesAdditionalProperties()
{
LineSeriesConfigurator a = new();
LineSeriesConfigurator b = new();
Expression <Func <LineSeries, string?> > propertyExpression = ls => ls.LabelFormatString;
const string format = "ABC";
a.SetAdditional(propertyExpression, format);
// Property only set on a
Combinator <LineSeriesConfigurator> combinator = new(a, b);
LineSeriesConfigurator combined = combinator.Combine();
ConfigurableProperty <string>?combinedProperty = combined.AdditionalProperties.Get(propertyExpression);
Assert.NotNull(combinedProperty);
Assert.True(combinedProperty !.IsSet);
Assert.Equal(format, combinedProperty.Value);
// Property set on a AND b, should take the value from a and ignore b
b.SetAdditional(propertyExpression, "ANOTHER RANDOM VALUE");
combinator = new Combinator <LineSeriesConfigurator>(a, b);
combined = combinator.Combine();
combinedProperty = combined.AdditionalProperties.Get(propertyExpression);
Assert.NotNull(combinedProperty);
Assert.True(combinedProperty !.IsSet);
Assert.Equal(format, combinedProperty.Value);
}