function timeoutAsync(cb, delay) {
  return new Promise((resolve, reject) => {
    setTimeout(function() {
      cb();
      resolve(true);
    }, delay);
  });
}

(function($) {
  $(document).ready(function() {

    var $mainMenu    = $('#nav-menus');
    var $menuRepo    = $('#menu-repo');
    var $linkToRepo1 = $menuRepo.find('a:first');
    var $menuExample = $('#menu-example');
    var $menuBtn     = $('#menu-btn');
    var $homeLink    = $('#nav-back-home');

    QUnit.test( "hello test", function( assert ) {
      assert.ok( 1 == "1", "Passed!" );
    });

    QUnit.test( "initial state", function( assert ) {
      assert.equal( 0, _ws.files.length, "_ws.files should hold 0 file when app started from root" );
      assert.ok( $menuRepo.is(':visible'), "menu repo visible (though menu is hidden)" );
      assert.equal( 2, ($menuRepo.find('a')).length, "menu repo should contain 2 links" );
      assert.ok( $menuExample.is(':visible'), "menu example visible (though menu is hidden AND menu empty)" );
      assert.equal( 0, ($menuExample.find('a')).length, "menu example should contain 0 links" );
    });

    QUnit.test( "test menu toggle", function( assert ) {
      var done = assert.async();
      assert.equal( $mainMenu.width(), 0, "0. INIT width should be 0" );
      assert.ok( $mainMenu.is(':visible'), "0. INIT menu should NOT have class 'in'" );
      $menuBtn.trigger('click');
      assert.ok( $mainMenu.hasClass('in'), "1.AFTER CLICK menu should have class 'in'" );
      assert.ok( $mainMenu.is(':visible'), "1.AFTER CLICK menu should be visible" );
      timeoutAsync(() => {
        assert.notEqual( $mainMenu.width(), 0, "1.AFTER CLICK menu should have width > 0" );
        $menuBtn.trigger('click');
        assert.ok( ! $mainMenu.hasClass('in'), "2.AFTER 2ND CLICK menu should NOT have class 'in'" );
      }, 100)
      .then(() => timeoutAsync(() => {
        assert.equal( $mainMenu.width(), 0, "2.AFTER 2ND CLICK width should be 0" );
        done();
      }, 160));
    });

    QUnit.test( "test nav to repo", function( assert ) {
      assert.equal( window.location.pathname, '/', "location should be / at first" );
      $linkToRepo1.trigger('click');
      assert.equal( window.location.pathname, '/example-repo1' );
    });

    QUnit.test( "test nav back to home", function( assert ) {
      $homeLink.trigger('click');
      assert.ok( window.location.pathname, '/', "location should be / when clicking app title" );
    });

  });
})(jQuery);