public void SimpleChain()
{
var c0 = new Int32ToBooleanConverter();
c0.ValuesForTrue.Add(1);
c0.ValuesForFalse.Add(-1);
c0.IfBoth = true;
c0.IfNeither = false;
var c1 = new BooleanToVisibilityConverter();
var c = new ChainConverter(c0, c1);
Assert.AreEqual(Visibility.Visible, c.Convert(1, typeof(Visibility), null, null));
Assert.AreEqual(Visibility.Collapsed, c.Convert(0, typeof(Visibility), null, null));
Assert.AreEqual(Visibility.Collapsed, c.Convert(-1, typeof(Visibility), null, null));
Assert.AreEqual(1, c.ConvertBack(Visibility.Visible, typeof(int), null, null));
Assert.AreEqual(-1, c.ConvertBack(Visibility.Collapsed, typeof(int), null, null));
}
public void NullChain()
{
var c0 = new Int32ToBooleanConverter();
c0.ValuesForTrue.Add(1);
c0.ValuesForFalse.Add(-1);
c0.IfBoth = true;
c0.IfNeither = false;
var c1 = new BooleanToVisibilityConverter();
var c = new ChainConverter(c0, c1);
// For null input, any result is accepted, without exception thrown.
Assert.IsNotNull(c.Convert(null, typeof(Visibility), null, null));
Assert.IsNotNull(c.ConvertBack(null, typeof(int), null, null));
c0.ValuesForTrue.Add(0);
Assert.IsNotNull(c.Convert(null, typeof(Visibility), null, null));
Assert.IsNotNull(c.ConvertBack(null, typeof(int), null, null));
}
public void WrongChain()
{
var c0 = new Int32ToBooleanConverter();
c0.ValuesForTrue.Add(1);
c0.ValuesForFalse.Add(-1);
c0.IfBoth = true;
c0.IfNeither = false;
var c1 = new Int32ToBooleanConverter();
c1.ValuesForTrue.Add(1);
c1.ValuesForFalse.Add(0);
c1.IfBoth = false;
c1.IfNeither = true;
var c = new ChainConverter(c0, c1);
Assert.AreEqual(false, c.Convert(null, typeof(bool), null, null));
Assert.AreEqual(-1, c.ConvertBack(null, typeof(int), null, null));
}