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scope test_LeftArrowScriptAutoCompleter

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.parser.importedPackages = -> null; // 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
  parser = new GazelleV_LeftArrowScriptParser;
  completer = new LeftArrowScriptAutoCompleter(parser);
  completer.globalMethodNames = -> ll("add", "pat", "lol");
  completer.parser.importedPackages = -> null; // to suppress class names being returned
  
  completer.seek("add", 3);
  assertFalseVerbose(contains(completer.getCompletions(), "add"));
  
  // test for standard function arguments (untyped, will break when
  // we introduce typing)
  
  parser = new GazelleV_LeftArrowScriptParser;
  completer = new LeftArrowScriptAutoCompleter(parser);
  completer.globalMethodNames = -> ll("add", "pat", "lol");
  completer.parser.importedPackages = -> null; // to suppress class names being returned
  
  completer.seek("add ", 4);
  assertContainsAll(completer.getCompletions(), ll("true", "false", "null"));
  
  // complete class name
  for (S text : ll("Mat", "Mat ")) {
    parser = new GazelleV_LeftArrowScriptParser; // restore class finding
    completer = new LeftArrowScriptAutoCompleter(parser);
    completer.seek(printQuoted(+text), 3);
    var completions = completer.getCompletions();
    pnlReversed(takeFirst(10, completions));
    assertEquals(0, indexOf(completions, "Math"));
  }
  
  // same after "new"
  parser = new GazelleV_LeftArrowScriptParser; // restore class finding
  completer = new LeftArrowScriptAutoCompleter(parser);
  
  completer.seek(print("new Inte"), 8);
  var completions = completer.getCompletions();
  pnlReversed(takeFirst(10, completions));
  assertEquals(0, indexOf(completions, "Integer"));
  
  // find inner classes of global function container
  parser = new GazelleV_LeftArrowScriptParser; // restore class finding
  parser.allowTheWorld(FunctionContainer.class);
  completer = new LeftArrowScriptAutoCompleter(parser);
  completer.seek(print("MyN"), 3);
  completions = completer.getCompletions();
  pnlReversed(takeFirst(10, completions));
  assertEquals(0, indexOf(completions, "MyName"));
  
  // auto-complete global script-defined functions
  parser = new GazelleV_LeftArrowScriptParser;
  parser.functionDefs.put("hello", new GazelleV_LeftArrowScript.FunctionDef);
  completer = new LeftArrowScriptAutoCompleter(parser);
  completer.seekEnd("he");
  completions = completer.getCompletions();
  assertContains(completions, "hello");
  
  // auto-complete known variables (TODO)
  /*parser = new GazelleV_LeftArrowScriptParser;
  parser.importedPackages = -> null;
  completer = new LeftArrowScriptAutoCompleter(parser);
  completer.seekEnd("a <- 1\n");
  pnl("knowVarsByTokenIdx", completer.knownVarsByTokenIdx);
  assertSetsEqual(listPlus(completer.predefinedExpressions(), "a"),
    completer.getCompletions());*/
}

sclass #FunctionContainer {
  class MyName {}
}