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Overview
Playwright is a recent browser automation tool that provides an alternative to Selenium.
Prerequisites
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For this example we will use Playwright Test Runner, that accommodate the needs of the end-to-end testing. It does everything you would expect from the regular test runner. Playwright Test Runner is still fairly new as you can see in the official documentation:
If you want, you can use other runners (e.g. Jest, AVA, mocha). What you need:
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Implementing tests
To start using the Playwright Test Runner, follow the Get Started documentation.
The test consists of validating the login feature (with valid and invalid credentials) of the demo site, for which we have created a page object that will represent the loginPage
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const config = require ("../config.json"); // models/Login.js class LoginPage { constructor(page) { this.page = page; } async navigate() { await this.page.goto(config.endpoint); } async login(username, password) { await this.page.fill(config.username_field, username); await this.page.fill(config.password_field, password); await this.page.click(config.login_button); } async getInnerText(){ return this.page.innerText("p"); } } module.exports = { LoginPage }; |
plus a configuration file where we have the identifiers that will match the elements in the page
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{ "endpoint" : "https://robotwebdemo.onrender.com/", "login_button" : "id=login_button", "password_field" :"input[id=\"password_field\"]", "username_field" : "input[id=\"username_field\"]" } |
And define the test that will assert if the operation is successful or not
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import {it, describe, expect} from "@playwright/test" import { LoginPage } from "./models/Login"; describe("Login validations", () => { it('Login with valid credentials', async({page}) => { const loginPage = new LoginPage(page); await loginPage.navigate(); await loginPage.login("demo","mode"); const name = await loginPage.getInnerText(); expect(name).toBe('Login succeeded. Now you can logout.'); }); it('Login with invalid credentials', async({page}) => { const loginPage = new LoginPage(page); await loginPage.navigate(); await loginPage.login("demo","mode1"); const name = await loginPage.getInnerText(); expect(name).toBe('Login failed. Invalid user name and/or password.'); }); }) |
The Playwright Test Runner provides a Jest like way of describing test scenarios, here you can see that it uses 'it, describe, expect'.
These are simple tests that will validate the login functionality by accessing the demo site, inserting the username and password (in one test with valid credentials and in another with invalid credentials), clicking the login button and validating if the page returned is the one that matches your expectation.
For the below example we will do a small change to force a failure, so in the login.spec.ts file remove "/or" from the expectation on the Test ' Login with invalid credentials', this is the end result:
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import { test, expect } from "@playwright/test" import { LoginPage } from "./models/Login"; test.describe("Login validations", () => { test('Login with valid credentials', async({ page }) => { const loginPage = new LoginPage(page); await loginPage.navigate(); await loginPage.login("demo","mode"); const name = await loginPage.getInnerText(); expect(name).toBe('Login succeeded. Now you can logout.'); }); test('Login with invalid credentials', async({ page }) => { const loginPage = new LoginPage(page); await loginPage.navigate(); await loginPage.login("demo","mode1"); const name = await loginPage.getInnerText(); expect(name).toBe('Login failed. Invalid user name and password.'); }); }) |
Once the code is implemented (and we will make it fail on purpose on the 'Login with invalid credentials' test due to missing word, to show the failure reports), can be executed with the following command:
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npx folio -p browserName=chromium --reporter=junit,line --test-match=login.spec.ts |
First, define one extra parameter: "browserName" in order to execute the tests only with the chrome browser (chromium), otherwise the default behaviour is to execute the tests for the three available browsers (chromium, firefox and webkit).
The results are immediately available in the terminal
In this example, one test has failed and the other one has succeed, the output generated in the terminal is the above one and the corresponding Junit report is below:
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<testsuites id="" name="" tests="2" failures="1" skipped="0" errors="0" time="2.592"> <testsuite name="login.spec.ts" timestamp="1617094735952" hostname="" tests="2" failures="1" skipped="0" time="2.37" errors="0"> <testcase name="Login validations Login with valid credentials" classname="login.spec.ts Login validations" time="1.358"> </testcase> <testcase name="Login validations Login with invalid credentials" classname="login.spec.ts Login validations" time="1.012"> <failure message="login.spec.ts:14:5 Login with invalid credentials" type="FAILURE"> login.spec.ts:14:5 › Login validations Login with invalid credentials ============================ browserName=webkit, headful=false, slowMo=0, video=false, screenshotOnFailure=false Error: expect(received).toBe(expected) // Object.is equality Expected: "Login failed. Invalid user name and password." Received: "Login failed. Invalid user name and/or password." 17 | await loginPage.login("demo","mode1"); 18 | const name = await loginPage.getInnerText(); > 19 | expect(name).toBe('Login failed. Invalid user name and password.'); | ^ 20 | }); 21 | }) at /Users/cristianocunha/Documents/Projects/Playwrighttest/login.spec.ts:19:22 at runNextTicks (internal/process/task_queues.js:58:5) at processImmediate (internal/timers.js:434:9) at WorkerRunner._runTestWithFixturesAndHooks (/Users/cristianocunha/Documents/Projects/Playwrighttest/node_modules/folio/out/workerRunner.js:198:17) </failure> </testcase> </testsuite> </testsuites> |
Repeat this process for each browser type in order to have the reports generated for each browser.
Notes:
- By default it will execute tests for the 3 browser types available (that is why we are forcing it to execute for only one browser)
- By default all the tests will be executed in headless mode
- Folio command line will search and execute all tests in the format: "**/?(*.)+(spec|test).[jt]s"
- In order to get the Junit test report please follow this section.
Integrating with Xray
As we saw in the above example, where we are producing Junit reports with the result of the tests, it is now a matter of importing those results to your Jira instance. You can do this by simply submitting automation results to Xray through the REST API, by using one of the available CI/CD plugins (e.g. for Jenkins) or using the Jira interface to do so.
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Tips
- after results are imported in Jira, Tests can be linked to existing requirements/user stories, so you can track the impact of their coverage.
- results from multiple builds can be linked to an existing Test Plan in order to facilitate the analysis of test result trends across builds.
- results can be associated with a Test Environment, in case you want to analyze coverage and test results by that environment later on. A Test Environment can be a testing stage (e.g. dev, staging, preprod, prod) or an identifier of the device/application used to interact with the system (e.g. browser, mobile OS).
References
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