svoid test_LeftArrowScriptAutoCompleter() {
  new GazelleV_LeftArrowScriptParser parser;
  LeftArrowScriptAutoCompleter completer = new(parser);
  
  // simple test for completing global function name
  
  completer.globalMethodNames = -> ll("add", "pat", "lol");
  completer.importedPackages = -> ll(); // to suppress class names being returned
  completer.seek("a", 1);
  assertEqualsVerbose("a", completer.typedCharacters());
  assertEqualsVerbose(ll("add", "pat", "false"), completer.getCompletions());
  
  // test that completed word is not shown as suggestion
  completer.seek("add", 3);
  assertFalseVerbose(contains(completer.getCompletions(), "add"));
  
  // test for standard function arguments (untyped, will break when
  // we introduce typing)
  
  completer.seek("add ", 4);
  assertContainsAll(completer.getCompletions(), ll("true", "false", "null"));
  
  // complete class name
  completer = new LeftArrowScriptAutoCompleter(parser); // restore class finding
  completer.seek(print("Mat"), 0);
  var completions = completer.getCompletions();
  pnl(reversed(completions));
  assertContainsAll(completions, ll("Math"));
}