CBPlaywright Skill

When to Use This Skill

Load this skill when:

• Writing browser-level end-to-end tests for ColdBox applications
• Automating form submissions, navigation, or multi-step flows
• Taking screenshots or recording traces for visual regression
• Intercepting or mocking network requests in tests
• Structuring E2E tests with the Page Object pattern

Installation

box install cbplaywright --saveDev

Install Playwright browsers (run once after installation):

box playwright install

Core API

Test Bundle Setup

// tests/e2e/UserFlowSpec.bx
class extends="cbplaywright.models.PlaywrightTestCase" {

    // Browser type: chromium | firefox | webkit
    this.browser = "chromium"
    this.headless = true
    this.baseURL  = "http://localhost:8500"

    function run( spec ) {
        describe( "User registration flow", () => {

            it( "can register a new user", ( browser ) => {
                var page = browser.newPage()
                // test body
                page.close()
            } )

        } )
    }
}

Navigation & Waiting

page.navigate( baseURL & "/register" )
page.waitForLoadState( "networkidle" )
page.waitForURL( baseURL & "/dashboard" )

Selectors

page.locator( "input[name='email']" )
page.locator( "#submitBtn" )
page.locator( "text=Sign In" )
page.locator( "role=button[name='Submit']" )
page.getByPlaceholder( "Email address" )
page.getByLabel( "Password" )
page.getByRole( "link", { name: "Forgot password?" } )
page.getByText( "Welcome back" )

Interactions

page.locator( "input[name='email']" ).fill( "[email protected]" )
page.locator( "input[name='password']" ).fill( "secret123" )
page.locator( "#loginBtn" ).click()
page.locator( "select[name='role']" ).selectOption( "admin" )
page.locator( "input[type='checkbox']" ).check()
page.locator( "input[type='checkbox']" ).uncheck()
page.keyboard.press( "Enter" )

Assertions

expect( page.locator( "h1" ) ).toBeVisible()
expect( page.locator( ".alert-success" ) ).toContainText( "Registration successful" )
expect( page.url() ).toContain( "/dashboard" )
expect( page.locator( "table tbody tr" ) ).toHaveCount( 5 )
expect( page.locator( "input[name='email']" ) ).toHaveValue( "[email protected]" )
expect( page.locator( "#logoutBtn" ) ).toBeEnabled()

Screenshots & Traces

page.screenshot( { path: expandPath( "/tests/screenshots/home.png" ) } )

// Full-page screenshot
page.screenshot( { path: expandPath( "/tests/screenshots/full.png" ), fullPage: true } )

Network Interception

// Mock an API response
page.route( "**/api/users", ( route ) => {
    route.fulfill( {
        status      : 200,
        contentType : "application/json",
        body        : serializeJSON( [ { id: 1, name: "Mock User" } ] )
    } )
} )

Production Patterns

Page Object Pattern

// tests/e2e/pages/LoginPage.bx
class {

    property name="page";
    property name="baseURL" default="http://localhost:8500";

    LoginPage function init( page, baseURL = "http://localhost:8500" ) {
        variables.page    = page
        variables.baseURL = baseURL
        return this
    }

    LoginPage function navigate() {
        page.navigate( baseURL & "/login" )
        return this
    }

    LoginPage function fillCredentials( email, password ) {
        page.locator( "input[name='email']" ).fill( email )
        page.locator( "input[name='password']" ).fill( password )
        return this
    }

    void function submit() {
        page.locator( "button[type='submit']" ).click()
        page.waitForLoadState( "networkidle" )
    }

    string function getErrorMessage() {
        return page.locator( ".alert-danger" ).innerText()
    }
}

// In the test spec
it( "shows error for bad credentials", ( browser ) => {
    var page      = browser.newPage()
    var loginPage = new tests.e2e.pages.LoginPage( page )

    loginPage
        .navigate()
        .fillCredentials( "[email protected]", "wrongpassword" )
        .submit()

    expect( loginPage.getErrorMessage() ).toContain( "Invalid credentials" )
    page.close()
} )

Full CRUD Flow Test

it( "can create and delete a user", ( browser ) => {
    var page = browser.newPage()

    // Login
    page.navigate( baseURL & "/login" )
    page.getByLabel( "Email" ).fill( "[email protected]" )
    page.getByLabel( "Password" ).fill( "Admin1234!" )
    page.getByRole( "button", { name: "Sign In" } ).click()
    page.waitForURL( "**/dashboard" )

    // Create user
    page.navigate( baseURL & "/users/new" )
    page.getByLabel( "Name" ).fill( "E2E Test User" )
    page.getByLabel( "Email" ).fill( "e2e_#createUUID()#@example.com" )
    page.getByRole( "button", { name: "Save" } ).click()
    expect( page.locator( ".alert-success" ) ).toBeVisible()

    // Delete the user
    page.locator( "button.delete-user:last-of-type" ).click()
    page.locator( ".confirm-dialog .btn-danger" ).click()
    expect( page.locator( ".alert-success" ) ).toContainText( "User deleted" )

    page.close()
} )

Best Practices

• Use Page Objects for any flow with more than 3 interactions — keeps tests readable
• Use getByRole and getByLabel selectors — more robust than CSS selectors when UI changes
• Always close pages in teardown or at the end of each test to avoid leaked browser contexts
• Use waitForLoadState( "networkidle" ) after navigation or actions that trigger async requests
• Store base URL in a single property — avoids hardcoding across hundreds of tests
• Mock external APIs with page.route() to isolate tests from third-party flakiness
• Run in headless mode in CI and only enable headed mode for local debugging

Documentation

• cbplaywright: https://github.com/coldbox-modules/cbplaywright
• Playwright API: https://playwright.dev/docs/api/class-page