public void ContainsTest()
{
var opt1 = new Optional <int>(10);
Assert.IsTrue(opt1.Contains(10));
Assert.IsFalse(opt1.Contains(7));
var opt2 = new Optional <int>();
Assert.IsFalse(opt2.Contains(5));
}
public void Optional_ContainsString_True()
{
Optional <string> optional = "text";
Assert.True(optional.HasValue);
Assert.True(optional.Contains("text"));
}
public void Optional_WithNull_ContainsNull_False()
{
Optional <string> optionalWithoutValue = null;
Assert.False(optionalWithoutValue.HasValue);
Assert.False(optionalWithoutValue.Contains(null));
}
public void Optional_ContainsDifferentString_False()
{
Optional <string> optional = "text";
Assert.True(optional.HasValue);
Assert.False(optional.Contains("different_text"));
}
protected Token TokenOf(Acceptor acceptor)
{
var optional = new Acceptor[] { Commenting, Parameters, Self };
var found = Lexicon.FirstOrDefault(pair => pair.Item2.ValueOf == acceptor);
var token = found != null ? found.Item2 : null;
if ((token == null) && !Optional.Contains(acceptor))
{
throw Language.Error("missing required token definition: {0}", acceptor.Method.Name);
}
return(token);
}
