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E2EE2E for .NET

Dariten

A web test of Dariten, a public personal finance demo. Each browser keeps its own sample household, so the tests only read the app and never check specific balances.

The tests

Section titled “The tests”

The_dashboard_links_to_the_transaction_register uses locators only and needs no model:

await App.OpenAsync("/");
await Expect.That(Screen.GetByRole("heading", "Dashboard")).ToBeVisibleAsync();
await Expect.That(Screen.GetByTestId("demo-banner")).ToContainTextAsync("Local demo");


await Screen.GetByRole("link", "Transactions").ClickAsync();
await Expect.That(Screen.GetByRole("heading", "Transactions")).ToBeVisibleAsync();

An_agent_filters_the_register_by_category hands the goal to the agent, then judges the result. It is in the RealModel category:

await App.OpenAsync("/transactions");
await Agent.ActAsync("filter the register to show only the Groceries category");
await Agent.AssertAsync("every transaction listed is in the Groceries category, or the register says no transactions match");
await Expect.That(Screen.GetByRole("heading", "Transactions")).ToBeVisibleAsync();

Run it

Section titled “Run it”
Terminal window
dotnet test --project samples/E2E.Sample                       # NUnit
dotnet test --project samples/E2E.XUnit.V3.Sample              # xUnit v3
dotnet test --project samples/E2E.Sample --filter "TestCategory!=RealModel"   # no model
E2E_HEADLESS=0 dotnet test --project samples/E2E.Sample        # watch the browser

The config’s agents.default.context tells the agent this browser keeps its own sample household, and that it must not enter real bank data or add, edit, or delete data. Use that pattern when a test must not mutate the app’s stored data.

To use an API key, change agents.default in e2e.config.json, for example to "provider": "openai", "model": "gpt-4.1-mini" with OPENAI_API_KEY set.

Get started: webCreate a web test project and point it at your app.