6. Playwright for .NET

// dotnet add package Microsoft.Playwright.NUnit ; then: pwsh bin/Debug/net10.0/playwright.ps1 install
public class CheckoutTests : PageTest
{
    [Test]
    public async Task User_can_place_order()
    {
        await Page.GotoAsync("https://shop.example.com");
        await Page.GetByRole(AriaRole.Link, new() { Name = "Laptops" }).ClickAsync();
        await Page.GetByTestId("product-101").GetByRole(AriaRole.Button, new() { Name = "Add to cart" }).ClickAsync();
        await Page.GetByRole(AriaRole.Button, new() { Name = "Checkout" }).ClickAsync();
        await Expect(Page.GetByText("Order placed")).ToBeVisibleAsync();   // auto-retrying assertion
    }
}