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