svoid test_AutoClassifier1() {
  int n = 4; // number of examples to learn for - 4 actually work
  AutoClassifier1<S> c = AutoClassifier1.queueLess(S);

  // no labels in empty classifier
  classifier_testLabels(c, litorderedmap("hello", ll()));
  
  // train
  c.learn(takeFirst((n+1)/2, ll("hello", "abcde", "xxxxx")), "5 chars");
  c.learn(takeFirst(n/2, ll("bla", "abcd", "aa")), "not 5 chars");
  
  // test
  classifier_testLabels(c, litorderedmap(
    "world", ll("5 chars"),
    "......", ll("not 5 chars")));
}