public void DecoratorSetHandlesEmptyStringWhenTurnedOn()
{
var mockDa = new MockDa();
var underlyingValue = "";
var bldr = m_tsf.MakeString(underlyingValue, 77).GetBldr();
var decorator = new ShowSpaceDecorator(mockDa);
decorator.ShowSpaces = true;
decorator.SetString(27, StTxtParaTags.kflidContents, bldr.GetString());
var tss = mockDa.StringValues[new Tuple<int, int>(27, StTxtParaTags.kflidContents)];
Assert.That(string.IsNullOrEmpty(tss.Text));
VerifyNoBackColor(tss);
}