Overview

BddDotNet based autotest framework with Playwright integration

Key features:

• Gherkin syntax support
• C# expressions support for Gherkin syntax
• Component framework for UI testing
• Page object pattern support
• Playwright integration
• Test data management framework

Test example

Feature: CheckoutForm

Scenario: checkout form validation test
    Given navigate to '@Data.Common.HomePageUrl'
    When set following values:
    | Name                  | Value      |
    | checkout > first name | first_name |
    | checkout > last name  | last_name  |
    And click on 'checkout > continue to checkout'
    Then should be visible:
    | Name                              |
    | checkout > username error message |
    And should have following values:
    | Name                              | Value                      |
    | checkout > username error message | Your username is required. |

Requirements

• .NET 8+
• Visual Studio 2026 (or 2022) or Visual Studio Code
• Reqnroll plugin for Visual Studio or Cucumber plugin for Visual Studio Code

Nuget packages links

• https://www.nuget.org/packages/AutoTests.Framework
• https://www.nuget.org/packages/AutoTests.Framework.Playwright

How to use

BddDotNet wiki

You can also find example in Bootstrap.Tests project for UI testing

Guide:

1. Create new console application for .NET 10
2. Install nuget packages:

Description	Package
Add AutoTests.Framework with Playwright integration
Add Gherkin language support
Official Microsoft Playwright package

3. Configure application in Program.cs. Example:

using AutoTests.Framework;
using AutoTests.Framework.Playwright;
using BddDotNet;
using Bootstrap.Tests.Pages;
using Microsoft.Testing.Platform.Builder;

var builder = await TestApplication.CreateBuilderAsync(args);

var services = builder.AddBddDotNet();

services.SinglePageChromiumPlaywright(new() { Headless = false });
services.Page<BootstrapApplication>();

services.SourceGeneratedGherkinScenarios();
services.SourceGeneratedGherkinSteps();

using var testApp = await builder.BuildAsync();
return await testApp.RunAsync();

4. Add page objects. Example:

using AutoTests.Framework.Pages;

namespace Bootstrap.Tests.Pages;

internal sealed class BootstrapApplication
{
    [Route("checkout")]
    public required Checkout Checkout { get; init; }
}

internal sealed class Checkout
{
    [Route("continue to checkout")]
    [Options(".btn-primary")]
    public required Button ContinueToCheckout { get; init; }

    [Route("first name")]
    [Options("#firstName")]
    public required Input FirstName { get; init; }

    [Route("last name")]
    [Options("#lastName")]
    public required Input LastName { get; init; }

    [Route("username error message")]
    [Options("#username ~ .invalid-feedback")]
    public required Label UsernameErrorMessage { get; init; }
}

4. Done. You can add gherkin feature files with test scenarios. Example CheckoutForm.feature:

Feature: CheckoutForm

Scenario: checkout form validation test
    Given navigate to 'https://getbootstrap.com/docs/4.3/examples/checkout/'
    When set following values:
    | Name                  | Value      |
    | checkout > first name | first_name |
    | checkout > last name  | last_name  |
    And click on 'checkout > continue to checkout'
    Then should be visible:
    | Name                              |
    | checkout > username error message |
    And should have following values:
    | Name                              | Value                      |
    | checkout > username error message | Your username is required. |

How to make C# expressions and json data from resources available in gherkin feature files

1. Install BddDotNet.Gherkin.CSharpExpressions nuget package
2. Add service for avaiable C# expressions

using AutoTests.Framework.Resources;

namespace Bootstrap.Tests;

public sealed class CSharpExpressions(IDynamicDataService dynamicDataService)
{
    public dynamic Data { get; } = dynamicDataService.Data;
}

3. Configure BddDotNet.Gherkin.CSharpExpressions in Program.cs

services.CSharpExpressions<CSharpExpressions>(ScriptOptions.Default.AddReferences("Microsoft.CSharp"));
services.DynamicResourcesData([Assembly.GetExecutingAssembly()]);

4. Now You can create json file in Data subfolder and get access to content in feature to it like:

Feature: CheckoutForm

Scenario: checkout form validation test
    Given navigate to '@Data.Common.HomePageUrl' #return value HomePageUrl from Data\Common.json

You can find example in 'Bootstrap.Tests'

How to make custom component

You can create custom components with any custom logic. Example of button component:

using AutoTests.Framework.Contracts;
using AutoTests.Framework.Options;
using AutoTests.Framework.Routing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Playwright;

namespace AutoTests.Framework.Playwright;

public sealed class Button([FromKeyedServices] IComponentOptions options, IPage page) : IComponent, IClick
{
    private readonly string locator = options.Get<string>();

    public async Task ClickAsync()
    {
        await page.ClickAsync(locator);
    }
}

Example of step with components:

using AutoTests.Framework.Routing;

namespace Demo;

internal sealed class Steps(IRoutingService routingService)
{
    [When("click on '(.*)'")]
    public async Task ClickStep(string path)
    {
        await routingService.GetComponent<IClick>(path).ClickAsync();
    }
}

Components:

1. [required] Should implement IComponent interface
2. [required] Should implement contract interfaces like IClick, IVisible, e.t.c
3. [optional] Could reqeust options via [FromKeyedServices] IComponentOptions options. Use can use it for locators as example
4. [optional Could inject any other custom services. In this example IPage is a Playwright service for browser control.

You can find example in 'AutoTests.Framework.Playwright' for default components like button, input, e.t.c