cursor.atEnd returns true, cursor is at start?

[JuKu]

I am clearly doing something stupid that a newbie does, but I can't solve this. Here is my test code:

ui->TextEdit->setPlainText("testing\n");
  QTextCursor cursor( ui->TextEdit->textCursor() );
  cursor.movePosition (QTextCursor::End, QTextCursor::MoveAnchor);
  if(cursor.atEnd())
  {
    ui->TextEdit->insertPlainText("true\n");
  };

ui->TextEdit->setPlainText("testing\n");
  QTextCursor cursor( ui->TextEdit->textCursor() );
  cursor.movePosition (QTextCursor::End, QTextCursor::MoveAnchor);
  if(cursor.atEnd())
  {
    ui->TextEdit->insertPlainText("true\n");
  };

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This prints:

true
testing

I would expect the lines in different order. What am I missing?