acceptance-testing

Acceptance Test Authoring (Playwright)

This skill covers writing end-to-end acceptance tests using Playwright (.NET) to verify migrated Blazor applications work correctly.

Architecture

Test Suites

Suite	Location	Target App	Env Var
WingtipToys	src/WingtipToys.AcceptanceTests/	samples/AfterWingtipToys/	WINGTIPTOYS_BASE_URL
ContosoUniversity	src/ContosoUniversity.AcceptanceTests/	samples/AfterContosoUniversity/	CONTOSO_BASE_URL
Sample App	samples/AfterBlazorServerSide.Tests/	samples/AfterBlazorServerSide/	N/A (built inline)

Shared Infrastructure

Every test suite uses the same pattern:

PlaywrightFixture.cs — Shared browser instance:

public class PlaywrightFixture : IAsyncLifetime
{
    public IPlaywright Playwright { get; private set; } = null!;
    public IBrowser Browser { get; private set; } = null!;

    public async Task InitializeAsync()
    {
        Playwright = await Microsoft.Playwright.Playwright.CreateAsync();
        Browser = await Playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
        {
            Headless = true
        });
    }

    public async Task DisposeAsync()
    {
        await Browser.DisposeAsync();
        Playwright.Dispose();
    }

    public async Task<IPage> NewPageAsync()
    {
        var context = await Browser.NewContextAsync(new BrowserNewContextOptions
        {
            IgnoreHTTPSErrors = true
        });
        return await context.NewPageAsync();
    }
}

[CollectionDefinition("Playwright")]
public class PlaywrightCollection : ICollectionFixture<PlaywrightFixture> { }

TestConfiguration.cs — Environment-driven base URL:

public static class TestConfiguration
{
    public static string BaseUrl =>
        Environment.GetEnvironmentVariable("WINGTIPTOYS_BASE_URL")
        ?? "https://localhost:5001";
}

Writing a New Test

Step 1: Create the Test Class