public void TupleKeyInfoHelper_KeyMemberSelector()
{
TupleKeyInfoHelper builder = new TupleKeyInfoHelper(typeof(Tuple <int, string>));
Expression source = Expression.Constant(Tuple.Create(1, "2"));
Expression selector1 = builder.CreateKeyMemberSelectorExpression(source, 0);
Expression selector2 = builder.CreateKeyMemberSelectorExpression(source, 1);
int result1 = (int)Expression.Lambda(selector1).Compile().DynamicInvoke();
string result2 = (string)Expression.Lambda(selector2).Compile().DynamicInvoke();
Assert.AreEqual(1, result1);
Assert.AreEqual("2", result2);
}
public void TupleKeyInfoHelper_KeyMemberSelectorLarge()
{
var tuple = new Tuple <int, int, int, int, int, int, int, Tuple <int, int> >(
1, 2, 3, 4, 5, 6, 7, new Tuple <int, int>(8, 9));
TupleKeyInfoHelper builder = new TupleKeyInfoHelper(tuple.GetType());
Expression source = Expression.Constant(tuple);
Expression selector = builder.CreateKeyMemberSelectorExpression(source, 7);
int result = (int)Expression.Lambda(selector).Compile().DynamicInvoke();
Assert.AreEqual(8, result);
}