firefox/toolkit/components/autocomplete/tests/unit/test_finalCompleteValueSelectedIndex.js

function AutoCompleteResult(aResultValues) {
  this._values = aResultValues.map(x => x[0]);
  this._finalCompleteValues = aResultValues.map(x => x[1]);
}
AutoCompleteResult.prototype = Object.create(AutoCompleteResultBase.prototype);

var selectByWasCalled = false;
function AutoCompleteInput(aSearches) {
  this.searches = aSearches;
  this.popup.selectedIndex = 0;
  this.popup.selectBy = function (reverse, page) {
    Assert.equal(selectByWasCalled, false);
    selectByWasCalled = true;
    Assert.equal(reverse, false);
    Assert.equal(page, false);
    this.selectedIndex += (reverse ? -1 : 1) * (page ? 100 : 1);
  };
  this.completeSelectedIndex = true;
}
AutoCompleteInput.prototype = Object.create(AutoCompleteInputBase.prototype);

add_test(function test_handleEnter_key() {
  let results = [
    ["mozilla.com", "http://www.mozilla.com"],
    ["mozilla.org", "http://www.mozilla.org"],
  ];
  // First check the case where we do select a value with the keyboard:
  doSearch("moz", results, function (aController) {
    Assert.equal(aController.input.textValue, "moz");
    Assert.equal(
      aController.getFinalCompleteValueAt(0),
      "http://www.mozilla.com"
    );
    Assert.equal(
      aController.getFinalCompleteValueAt(1),
      "http://www.mozilla.org"
    );

    Assert.equal(aController.input.popup.selectedIndex, 0);
    // Hardcode KeyboardEvent.DOM_VK_DOWN, because we can't easily
    // include KeyboardEvent here.
    aController.handleKeyNavigation(0x28 /* KeyboardEvent.DOM_VK_DOWN */);
    Assert.equal(aController.input.popup.selectedIndex, 1);
    // Simulate mouse interaction changing selectedIndex
    // ie NOT keyboard interaction:
    aController.input.popup.selectedIndex = 0;

    aController.handleEnter(false);
    // Verify that the keyboard-selected thing got inserted,
    // and not the mouse selection:
    Assert.equal(aController.input.textValue, "http://www.mozilla.org");
  });
});

add_test(function test_handleEnter_mouse() {
  let results = [
    ["mozilla.com", "http://www.mozilla.com"],
    ["mozilla.org", "http://www.mozilla.org"],
  ];
  // Then the case where we do not:
  doSearch("moz", results, function (aController) {
    Assert.equal(aController.input.textValue, "moz");
    Assert.equal(
      aController.getFinalCompleteValueAt(0),
      "http://www.mozilla.com"
    );
    Assert.equal(
      aController.getFinalCompleteValueAt(1),
      "http://www.mozilla.org"
    );

    Assert.equal(aController.input.popup.selectedIndex, 0);
    aController.input.popupOpen = true;
    // Simulate mouse interaction changing selectedIndex
    // ie NOT keyboard interaction:
    aController.input.popup.selectedIndex = 1;
    Assert.equal(selectByWasCalled, false);
    Assert.equal(aController.input.popup.selectedIndex, 1);

    aController.handleEnter(false);
    // Verify that the input stayed the same, because no selection was made
    // with the keyboard:
    Assert.equal(aController.input.textValue, "moz");
  });
});

add_test(function test_handleEnter_preselected() {
  let results = [
    ["mozilla.com", "http://www.mozilla.com"],
    ["mozilla.org", "http://www.mozilla.org"],
  ];
  // Then test a preselection.
  doSearch("moz", results, function (aController) {
    Assert.equal(aController.input.textValue, "moz");
    Assert.equal(
      aController.getFinalCompleteValueAt(0),
      "http://www.mozilla.com"
    );
    Assert.equal(
      aController.getFinalCompleteValueAt(1),
      "http://www.mozilla.org"
    );

    aController.setInitiallySelectedIndex(0);

    aController.handleEnter(false);
    // Verify that the input stayed the same, because no selection was made
    // with the keyboard:
    Assert.equal(aController.input.textValue, "http://www.mozilla.com");
  });
});

function doSearch(aSearchString, aResults, aOnCompleteCallback) {
  selectByWasCalled = false;
  let search = new AutoCompleteSearchBase(
    "search",
    new AutoCompleteResult(aResults)
  );
  registerAutoCompleteSearch(search);

  let controller = Cc["@mozilla.org/autocomplete/controller;1"].getService(
    Ci.nsIAutoCompleteController
  );

  // Make an AutoCompleteInput that uses our searches and confirms results.
  let input = new AutoCompleteInput([search.name]);
  input.textValue = aSearchString;

  controller.input = input;
  controller.startSearch(aSearchString);

  input.onSearchComplete = function onSearchComplete() {
    aOnCompleteCallback(controller);

    // Clean up.
    unregisterAutoCompleteSearch(search);
    run_next_test();
  };
}