PCL Testing

PCL Testing is a simple test framework for testing across .NET platforms. It supports .NET Framework 4.5, Windows Phone 8, Windows Store apps, Silverlight 5, Xamarin.iOS, and Xamarin.Android.

Portable Class Libraries (PCLs) make it easy to write code for multiple platforms, but there's not currently a great way to test a PCL on each platform it targets. Hopefully test frameworks such as xUnit and MSTest will soon support cross-platform testing with PCLs. In the meantime, PCL Testing provides basic support for writing portable tests and running them on multiple platforms.

How to install?

Always Be NuGetting.

Usage

PCL Testing includes MSTest-style test attributes and asserts, and a simple test runner which can discover and run tests. You can put your tests in a Portable Class Library, and create apps for each platform you support which reference the PCL tests and provide UI to run them and display the results.

Because the included test runner includes only very basic functionality, I recommend using MSTest on platforms where it is supported (ie .NET Framework and Windows Store apps). To do this, create MSTest projects which include your test source code via file linking. The test attributes and asserts are in different namespaces for PCL Testing, MSTest, and MSTest for Windows Store apps, but PCL testing includes dummy types in the MSTest namespaces so in your test source code you can simply add using statements for all the namespaces, as follows:

using PCLTesting;
using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
using Microsoft.VisualStudio.TestTools.UnitTesting;

To create a test runner that runs on device, install the PCL Testing NuGet package in a new device app, which may target any of:

1. Windows Phone 8.x Silverlight (no Windows Phone 8.1 Appx support yet)
2. Xamarin.Android
3. Xamarin.iOS

Then follow these steps for each device project. In each case, consider replacing the argument to the TestRunner constructor to point to the assemblies that contain your unit tests.

Windows Phone

Add this to your MainPage.xaml.cs file:

using PCLTesting.Runner;
using Xamarin.Forms;

Replace your MainPage constructor with this:

public MainPage()
{
    this.InitializeComponent();
    Forms.Init();

    var runner = new TestRunner(Assembly.GetExecutingAssembly());
    this.Content = new NavigationPage(new TestRunnerPage(runner)).ConvertPageToUIElement(this);
}

Android

Add this to your MainActivity.cs file:

using PCLTesting.Runner;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

Replace your MainActivity class with this:

// Preserve the Activity attribute that you already had.
public class MainActivity : AndroidActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        Xamarin.Forms.Forms.Init(this, bundle);

        var runner = new TestRunner(Assembly.GetExecutingAssembly());
        SetPage(new NavigationPage(new TestRunnerPage(runner)));
    }
}

iOS

Add this to your AppDelegate.cs file:

using PCLTesting.Runner;
using Xamarin.Forms;

Replace your FinishedLaunching method with this:

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
    window = new UIWindow(UIScreen.MainScreen.Bounds);
    Forms.Init();

    var runner = new TestRunner(Assembly.GetExecutingAssembly());
    window.RootViewController = new NavigationPage(new TestRunnerPage(runner)).CreateViewController();

    window.MakeKeyAndVisible();
    return true;
}

For a full example of how to use PCL Testing, see the samples in the source code behind PCL Testing.