public void AnonymousTypeKeyInfoHelper_KeyMemberSelector()
{
var key = new { Key1 = 1, Key2 = "2" };
AnonymousTypeKeyInfoHelper builder = new AnonymousTypeKeyInfoHelper(key.GetType());
Expression source = Expression.Constant(key);
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 AnonymousTypeKeyInfoHelper_KeyFactory()
{
var key = new { Key1 = 1, Key2 = "2" };
AnonymousTypeKeyInfoHelper builder = new AnonymousTypeKeyInfoHelper(key.GetType());
Expression factory = builder.CreateKeyFactoryExpression(
Expression.Constant(1, typeof(int)),
Expression.Constant("2", typeof(string)));
dynamic result = Expression.Lambda(factory).Compile().DynamicInvoke();
Assert.AreEqual(1, result.Key1);
Assert.AreEqual("2", result.Key2);
}