public void NonExistingUserContainsUsersForSubchannelTest()
{
ITvCardContext ctx = new TvCardContext();
IUser u1 = new User("u1", false, 1);
u1.SubChannel = 2;
ctx.Add(u1);
Assert.IsFalse(ctx.ContainsUsersForSubchannel(1), "user with subchannel found");
}