@serenity-js/playwright-test

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Serenity/JS Playwright Test

@serenity-js/playwright-test module offers a Serenity/JS reporter and fixtures that integrate Playwright Test with Serenity/JS Screenplay Pattern APIs.

Installation

To install this module, use an existing Playwright project or generate a new one by running:

npm init playwright@latest

Next, run the following command in your Playwright project directory:

npm install --save-dev @serenity-js/{assertions,console-reporter,core,serenity-bdd,web,playwright,playwright-test}

Serenity/JS Playwright Fixtures

To use Serenity/JS Screenplay Pattern APIs and benefit from the in-depth reporting capabilities, import Serenity/JS test fixtures instead of the default ones:

// example.spec.ts
+ import { test } from '@serenity-js/playwright-test'
- import { test } from '@playwright/test'

test.describe('Serenity Screenplay with Playwright', () => {
    
    test.describe('New Todo', () => {

        test('should allow me to add todo items', async ({ page }) => {
            //...
        })
    })
})

If you prefer, Serenity/JS also offers the more concise BDD-style describe/it syntax:

// example.spec.ts
import { describe, it, test } from '@serenity-js/playwright-test'

test.use({
    headles: true,
})

describe('Serenity Screenplay with Playwright', () => {
    
    describe('New Todo', () => {

        it('should allow me to add todo items', async ({ page }) => {
            //...
        })
    })
})

Serenity/JS Screenplay Pattern Actors

Serenity/JS test fixtures simplify how you instantiate and use Serenity/JS Screenplay Pattern Actors.

Single-actor scenarios

If your tests need only a single actor, you can inject it using the actor fixture. To configure the name of your default actor, use the defaultActorName configuration property:

// example.spec.ts

import { describe, it, test } from '@serenity-js/playwright-test'   // import fixtures
import { Navigate, Page } from '@serenity-js/playwright'            // import Screenplay Pattern web APIs
import { Ensure, equals } from '@serenity-js/assertions'            // import Screenplay Pattern assertion APIs                            

test.use({
    headles: true,
    defaultActorName: 'Serena'  // change default actor name
})

describe('Serenity Screenplay with Playwright', () => {
    
    describe('New Todo', () => {

        // inject default actor:
        it('should allow me to add todo items', async ({ actor }) => { 
            
            // define test workflow
            await actor.attemptsTo(                                                  
                Navigate.to('https://todo-app.serenity-js.org/'),
                Ensure.that(Page.current().title(), equals('Serenity/JS TodoApp')),
            )
        })
    })
})

Multi-actor scenarios

For multi-actor scenarios where you need each actor to use a separate browser, use the actorCalled fixture. You can also use this pattern to override the default actor name on a per-scenario basis:

// example.spec.ts

import { describe, it, test } from '@serenity-js/playwright-test'   // import fixtures

describe('Serenity Screenplay with Playwright', () => {
    
    describe('Chat app', () => {

        it('should allow actors to send and receive messages', async ({ actorCalled }) => { 

            // define part of the workflow performed by the first actor:
            await actorCalled('Alice').attemptsTo(                               
                // navigate to a chat app
                // post a message to Bob
            )

            // define parts of the workflow performed by the any other actors:
            await actorCalled('Bob').attemptsTo(                                 
                // navigate to a chat app
                // post a reply to Alice
            )

            // Note that invoking actorCalled(name) multiple times
            // while using the same name and within the scope of a single test
            // returns the same actor, so you don't need to cache them:
            await actorCalled('Alice').attemptsTo(                              
                // check if the reply from Bob is received                      
            )                                                                   
        })
    })
})

Customising Actors

The default cast of actors is limited to using a single ability to BrowseTheWebWithPlaywright.

If you'd like to give your actors additional abilities, like to TakeNotes, CallAnApi, or ManageALocalServer, you can install the relevant Serenity/JS module and configure them as follows:

// example.spec.ts

import { Cast, TakeNotes } from '@serenity-js/core'
import { test } from '@serenity-js/playwright-test'
import { BrowseTheWebWithPlaywright } from '@serenity-js/playwright'
import { CallAnApi } from '@serenity-js/rest'                            

test.use({
    actors: async ({ browser, baseURL }, use) => {
        await use(
            Cast.where(actor => actor.whoCan(
                BrowseTheWebWithPlaywright.using(browser),
                TakeNotes.usingAnEmptyNotepad(),
                CallAnApi.at(baseURL),
            ))
        )
    },
})

For scenarios where different actors need to be configured differently, you can also implement your own Cast:

// example.spec.ts

import { Cast } from '@serenity-js/core'
import { BrowseTheWebWithPlaywright, PlaywrightOptions } from '@serenity-js/playwright'
import { test } from '@serenity-js/playwright-test'
import { CallAnApi } from '@serenity-js/rest'
import { Browser } from 'playwright'

class Actors implements Cast {
    constructor(
        private readonly browser: Browser,
        private readonly options: PlaywrightOptions,
    ) {
    }

    prepare(actor: Actor) {
        switch (actor.name) {
            case 'James':
                return actor.whoCan(BrowseTheWebWithPlaywright.using(this.browser, this.options))
            default:
                return actor.whoCan(CallAnApi.at(this.options.baseURL))
        }
    }
}

test.use({
    actors: async ({ browser, config }) => {
        await use(new Actors(browser, {
            defaultNavigationWaitUntil: 'domcontentloaded'
        }))
    }
})

Serenity Reports

To use Serenity/JS reporting capabilities, register the @serenity-js/playwright-test reporter in your playwright.config.ts and define the appropriate reporting services (a.k.a. your "stage crew").

For example, to enable Serenity/JS Console Reporter and Serenity BDD reporter, install the relevant modules:

npm install --save-dev @serenity-js/{console-reporter,serenity-bdd}

Next, configure your Playwright project as follows:

// playwright.conf.ts

import type { PlaywrightTestConfig } from '@playwright/test'

const config: PlaywrightTestConfig = {
    reporter: [
        [ '@serenity-js/playwright-test', {
            crew: [
                '@serenity-js/serenity-bdd',
                '@serenity-js/console-reporter',
                [ '@serenity-js/core:ArtifactArchiver', { outputDirectory: 'target/site/serenity' } ],
                // '@serenity-js/core:StreamReporter',
            ]
        }],

        // optional
        [ 'html', { open: 'never' } ],          // built-in Playwright HTML reporter
    ],

    // Other configuration omitted for brevity
    // For details, see https://playwright.dev/docs/test-configuration
}

export default config

Note that Serenity/JS reporters work well with the built-in Playwright reporters.

Reference implementation

You can find a reference implementation demonstrating how to integrate Serenity/JS with Playwright Test in the Serenity/JS GitHub repository.

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Changelog

3.4.1 (2023-06-23)

Bug Fixes

• deps: update playwright dependencies to ^1.35.1 (9124e2e)