Soenneker.Playwrights.TestEnvironment 11.0.328

Soenneker.Playwrights.TestEnvironment

Runs an ASP.NET Core project on an available loopback port and provides headless Playwright sessions for integration tests.

Installation

dotnet add package Soenneker.Playwrights.TestEnvironment

Registration

Register the host options and environment in the test service collection:

using Microsoft.Extensions.DependencyInjection;
using Soenneker.Playwrights.TestEnvironment.Options;
using Soenneker.Playwrights.TestEnvironment.Registrars;

services.AddSingleton(new PlaywrightTestHostOptions
{
    SolutionFileName = "MyApp.slnx",
    ProjectRelativePath = "src/MyApp/MyApp.csproj",
    ApplicationName = "MyApp",
    Restore = true,
    Build = true,
    BuildConfiguration = "Release"
});

services.AddPlaywrightTestEnvironmentAsSingleton();

Use the singleton registration for a test host shared by the suite. AddPlaywrightTestEnvironmentAsScoped() gives each scope its own mutable host runtime, while the Playwright installer and HTTP transport remain process-wide singletons.

Start the application and create a session

using Soenneker.Playwrights.TestEnvironment.Abstract;

IPlaywrightTestEnvironment environment =
    serviceProvider.GetRequiredService<IPlaywrightTestEnvironment>();

await environment.Initialize(
    @"C:\git\MyApp\src\MyApp\MyApp.csproj",
    cancellationToken);

await using var session = await environment.CreateSession(cancellationToken: cancellationToken);

await session.Page.GotoAsync("/");
await Assertions.Expect(session.Page.GetByRole(AriaRole.Heading))
                .ToBeVisibleAsync();

Initialize installs the configured Playwright browser if needed, starts Chromium, launches the project at BaseUrl, and waits until the application accepts HTTP requests. Dispose the environment to close Playwright and terminate the application process.

Session reuse

Sessions get their own context and page unless reuse is enabled:

services.AddSingleton(new PlaywrightTestHostOptions
{
    SolutionFileName = "MyApp.slnx",
    ProjectRelativePath = "src/MyApp/MyApp.csproj",
    ReuseBrowserContextAcrossSessions = true,
    ReusePageAcrossSessions = false
});

Per-session overrides take precedence over the host defaults:

await using var session = await environment.CreateSession(
    new PlaywrightSessionOptions
    {
        ReuseBrowserContextAcrossSessions = true,
        ReusePageAcrossSessions = false
    },
    cancellationToken);

Reusing a page implies reusing its context. A session does not dispose shared pages or contexts; the environment owns and releases them.