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TUnit

T(est)Unit!

Documentation

See here: https://thomhurst.github.io/TUnit/

IDE

TUnit is built on top of newer Microsoft.Testing.Platform libraries, as opposed to older legacy VSTest libraries. As of July 2024, IDEs do not fully support this testing platform yet.

Visual Studio Preview versions can run the new tests by enabling the new testing platform server mode, within Visual Studio preview/experimental features. You will have to opt in to this manually.

For Rider, it is not yet supported. I believe they are working on it so we just have to wait for now.

dotnet CLI - Fully supported. Tests should be runnable with both dotnet test or dotnet run. dotnet run should give you a better experience and make it simpler to pass in test flags!

Features

Source generated tests
Full async support
Parallel by default, with mechanisms to switch it off for certain tests
Test ordering (if running not in parallel)
Tests can depend on other tests to form chains
Easy to read assertions
Injectable test data functionality
Hooks before and after: Assembly, Class, Test
Designed to avoid common pitfalls such as leaky test states
Ability to view and interrogate metadata and results from various assembly/class/test context objects

Installation

dotnet add package TUnit --prerelease

Example test

    [Test]
    public async Task Test1()
    {
        var value = "Hello world!";

        await Assert.That(value)
            .Is.Not.Null
            .And.Does.StartWith("H")
            .And.Has.Count().EqualTo(12)
            .And.Is.EqualTo("hello world!", StringComparison.InvariantCultureIgnoreCase);
    }

or with more complex test orchestration needs

    [BeforeAllTestsInClass]
    public static async Task ClearDatabase(ClassHookContext context) { ... }

    [AfterAllTestsInClass]
    public static async Task AssertDatabaseIsAsExpected(ClassHookContext context) { ... }

    [BeforeEachTest]
    public async Task CreatePlaywrightBrowser(TestContext context) { ... }

    [AfterEachTest]
    public async Task DisposePlaywrightBrowser(TestContext context) { ... }

    [Retry(3)]
    [Test, DisplayName("Register an account")]
    [EnumerableMethodData(nameof(GetAuthDetails))]
    public async Task Register(string username, string password) { ... }

    [DataSourceDrivenTest, DependsOn(nameof(Register))]
    [EnumerableMethodData(nameof(GetAuthDetails))]
    public async Task Login(string username, string password) { ... }

    [DataSourceDrivenTest, DependsOn(nameof(Login), [typeof(string), typeof(string)])]
    [EnumerableMethodData(nameof(GetAuthDetails))]
    public async Task DeleteAccount(string username, string password) { ... }

    [Category("Downloads")]
    [Timeout(300_000)]
    [Test, NotInParallel(Order = 1)]
    public async Task DownloadFile1() { ... }

    [Category("Downloads")]
    [Timeout(300_000)]
    [Test, NotInParallel(Order = 2)]
    public async Task DownloadFile2() { ... }

    [Repeat(10)]
    [DataDrivenTest]
    [Arguments(1)]
    [Arguments(2)]
    [Arguments(3)]
    [DisplayName("Go to the page numbered $page")]
    public async Task GoToPage(int page) { ... }

    [Category("Cookies")]
    [Test, Skip("Not yet built!")]
    public async Task CheckCookies() { ... }

    [Test, Explicit, WindowsOnlyTest, RetryHttpServiceUnavailable]
    [Property("Some Key", "Some Value")]
    public async Task Ping() { ... }

    public static IEnumerable<(string Username, string Password)> GetAuthDetails()
    {
        yield return ("user1", "password1");
        yield return ("user2", "password2");
        yield return ("user3", "password3");
    }

    public class WindowsOnlyTestAttribute : SkipAttribute
    {
        public WindowsOnlyTestAttribute() : base("Windows only test")
        {
        }

        public override Task<bool> ShouldSkip(TestContext testContext)
        {
            return Task.FromResult(!OperatingSystem.IsWindows());
        }
    }

    public class RetryHttpServiceUnavailableAttribute : RetryAttribute
    {
        public RetryHttpServiceUnavailableAttribute(int times) : base(times)
        {
        }

        public override Task<bool> ShouldRetry(TestInformation testInformation, Exception exception, int currentRetryCount)
        {
            return Task.FromResult(exception is HttpRequestException { StatusCode: HttpStatusCode.ServiceUnavailable });
        }
    }

thomhurst/TUnit.Enginev0.1.455

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