describe('Login functionality', function() { it('should login successfully', function() { browser.get('https://myapp.com/login'); element(by.model('username')).sendKeys('myusername'); element(by.model('password')).sendKeys('mypassword'); element(by.buttonText('Login')).click(); expect(browser.getCurrentUrl()).toEqual('https://myapp.com/dashboard'); }); });This code uses Protractor's `describe` and `it` functions to create a test suite and a test case. It then navigates to the login page of the web application using `browser.get`, fills in the username and password fields using `element(by.model)` and `sendKeys`, and clicks the login button using `element(by.buttonText)` and `click`. Finally, it asserts that the current URL after login is the dashboard URL using `expect`. The package library used in this example is `protractor`.