public static T Cast(S value)
{
if (s_cast == null)
{
s_cast = new CastFunc(GenericCast.CreateCast <S, T>());
}
return(s_cast(value));
}
private void AsSomething_WhenIsNotSomething_ThrowsException <TConcrete>(CastFunc castFunc)
{
// Arrange:
var token = new Token();
var tracer = new Mock <IDebugTracer>().Object;
var something = (IAstNode)Activator.CreateInstance(typeof(TConcrete), token, tracer);
// Act:
void Lambda() => castFunc(something);
// Assert:
Assert.Throws <NodeCastException>(Lambda);
}
private void AsSomething_WhenIsSomething_ReturnsSomething <TConcrete, TInterface>(CastFunc castFunc)
{
// Arrange:
var token = new Token();
var tracer = new Mock <IDebugTracer>().Object;
var something = (IAstNode)Activator.CreateInstance(typeof(TConcrete), token, tracer);
// Act:
var actual = castFunc(something);
// Assert:
Assert.That(actual, Is.InstanceOf(typeof(TInterface)));
}
