public void WhenConvertCalledWithNullThenWhenNullReturned()
{
// Arrange
var expected = Visibility.Collapsed;
var value = (object)null;
var target = new BooleanVisibilityConverter();
target.WhenNull = expected;
// Act
var actual = target.Convert(value, typeof(object), null, CultureInfo.InvariantCulture);
// Assert
Assert.AreEqual(expected, actual);
}