public void Test()
{
var u = new User()
{
Uid = "001",
Email = null,
Name = "a"
};
Db.AddUser(u);
Assert.True(Db.Users.FirstOrDefault(x => x.Uid == u.Uid) != null);
Assert.True(Db.FindUser("001") != null);
u.Name = "b";
Db.UpdateUser(u);
Assert.True(Db.FindUser("001").Name == "b");
Db.DeleteUser(u);
Assert.True(Db.FindUser("001") == null);
}