First lets create basic navbar.html with 3 options. (Home, List , Create)

<nav class="navbar navbar-default" role="navigation">
<ul class="nav navbar-nav">
  <li>
    <a id="home-navbar" routerLink="/home">Home</a>
  </li>
  <li>
    <a id="list-navbar" routerLink="/create" >List</a>
  </li>
  <li>
    <a id="create-navbar" routerLink="/create">Create</a>
  </li>
</ul>

second lets create navbar.e2e-spec.ts

describe('Navbar', () => {

  beforeEach(() => {
    browser.get('home'); // before each test navigate to home page.
  });

  it('testing Navbar', () => {
    browser.sleep(2000).then(function(){
      checkNavbarTexts();
      navigateToListPage();
    });
  });

  function checkNavbarTexts(){
    element(by.id('home-navbar')).getText().then(function(text){ // Promise
      expect(text).toEqual('Home');
    });

    element(by.id('list-navbar')).getText().then(function(text){ // Promise
      expect(text).toEqual('List');
    });

    element(by.id('create-navbar')).getText().then(function(text){ // Promise
      expect(text).toEqual('Create');
    });
  }

  function navigateToListPage(){
    element(by.id('list-home')).click().then(function(){ // first find list-home a tag and than click 
        browser.sleep(2000).then(function(){
          browser.getCurrentUrl().then(function(actualUrl){ // promise
            expect(actualUrl.indexOf('list') !== -1).toBeTruthy(); // check the current url is list
          });
        });

    });
  }
});

run the follows commands at cmd

• npm install -g protractor
• webdriver-manager update
• webdriver-manager start

**create protractor.conf.js file in the main app root.

very important to decleare useAllAngular2AppRoots: true

  const config = {
  baseUrl: 'http://localhost:3000/', 

  specs: [
      './dev/**/*.e2e-spec.js'
  ],

  exclude: [],
  framework: 'jasmine',

  jasmineNodeOpts: {
    showColors: true,
    isVerbose: false,
    includeStackTrace: false
  },

  directConnect: true,

  capabilities: {
    browserName: 'chrome',
    shardTestFiles: false,
    chromeOptions: {
      'args': ['--disable-web-security ','--no-sandbox', 'disable-extensions', 'start-maximized', 'enable-crash-reporter-for-testing']
    }
  },

  onPrepare: function() {
    const SpecReporter = require('jasmine-spec-reporter');
    // add jasmine spec reporter
    jasmine.getEnv().addReporter(new SpecReporter({ displayStacktrace: true }));

    browser.ignoreSynchronization = false;
  },
  useAllAngular2AppRoots: true
};

if (process.env.TRAVIS) {
  config.capabilities = {
    browserName: 'firefox'
  };
}

exports.config = config;

create basic test at dev directory.

describe('basic test', () => {

  beforeEach(() => {
    browser.get('http://google.com');
  });

  it('testing basic test', () => {
    browser.sleep(2000).then(function(){
      browser.getCurrentUrl().then(function(actualUrl){
        expect(actualUrl.indexOf('google') !== -1).toBeTruthy();
      });
    });
  });
});

run in cmd

protractor conf.js