Vincent Sibal's Blog : TestApi

New and updated test tools for WPF: TestApi v0.3 and WPF Control Verifier

vinsibal — Tue, 04 Aug 2009 15:09:00 GMT

TestApi v0.3

The WPF test team has recently released a new version of TestApi! This version includes libraries for fault injection, combinatorial varitation generation, new application control APIs, and updated tests and documentation. I think all the new libraries are really cool, especially the fault injection libraries. Learn more about it here.

WPF Control Verifier v0.1

In addition to TestApi, the test team has also developed a tool to verify the behavior of WPF controls. WPF Control Verifier is a tool that verifies the correctness of WPF Controls. This tool is geared towards WPF Control developers with the goal of providing a set of verifications that all controls can run and consume. Version 0.1 includes one category for verification – default style verification. These tests verify that your control can be styled such that its dependency properties are inheriting or template binding correctly. Future versions will include additional categories of verification. You can download the tool here. This is our first beta and we will be updating it based on your feedback. We have a planned set of features for future iterations but this will evolve based on your suggestions. Please send your feedback to wpfcvt@microsoft.com.

WPF TestApi v0.2 has released!

vinsibal — Fri, 24 Apr 2009 20:39:00 GMT

The WPF test team is hard at work to provide value through a simple and componetized library of public test APIs. The WPF TestApi library has just released a v0.2 which includes new visual verification features, command line parsing features, an auomated application controller, and new unit test samples.

Ivo has a great post about the visual verification APIs and usage that you can view here. Please try it out and let us know your feedback!

WPF TestApi and DataGrid Sample

vinsibal — Wed, 10 Dec 2008 19:33:00 GMT

Our WPF Test team has just released a library of tools that can be leveraged to test WPF applications. What's really cool is that these are utilities that we use internally and now we can push them out to external customers for feedback and usage. The library currently lives here on codeplex, http://www.codeplex.com/TestApi. There are a couple more blog posts where you can get more information about it.

http://blogs.msdn.com/llobo/archive/2008/12/08/wpf-test-helper-library.aspx

http://blogs.msdn.com/wpfsdk/archive/2008/12/09/testapi-released.aspx

The download contains some samples but I thought I would show a sample with one of the DataGrid applications instead.

I made some small modifications to the SampleTestApp to get it working with one of my DataGrid samples. In this sample, I am doing a visual verification test to check that the rows and cells update to the correct visual state when in edit mode. I am using the in-proc, out of thread strategy which is similar to the strategy used in the visual verification in the SampleTestApp.

To get the tests to work with the DataGridSample application, I needed to add automation id’s to some of the elements. In particular, the Window and the DataGrid:

<Window x:Class="DataGridSample.DataGridBasicSample"

AutomationProperties.AutomationId="DataGridBasicSample">

…

<dg:DataGrid x:Name="DataGrid_Standard"

AutomationProperties.AutomationId="DataGrid_Standard">

</dg:DataGrid>

…

</Window>

These IDs will be queried by my test in order to find the correct AutomationElements. And here is what the test will basically look like (left out logging and some error checking to make it more concise):

// retrieve the necessary AutomationElements

AutomationElement window = AutomationUtilities.FindElementsById(AutomationElement.RootElement, "DataGridBasicSample")[0];

AutomationElement dataGrid = AutomationUtilities.FindElementsById(window, "DataGrid_Standard")[0];

GridPattern grid = dataGrid.GetCurrentPattern(GridPattern.Pattern) as GridPattern;

AutomationElement cell = grid.GetItem(0, 0);

// do action for making cell editable

AutomationHelpers.MoveToAndDoubleClick(cell);

// Capture the actual pixels from the bounds of the screen rectangle

Snapshot actual = Snapshot.FromRectangle(AutomationHelpers.GetElementSize(dataGrid));

// Load the reference/master data from a previously saved file

Snapshot master = Snapshot.FromFile(Path.Combine(TestContext.TestDeploymentDir, "Master_EditTest1.png"));

if (CompareImages(actual, master) == VerificationResult.Fail)

{

Assert.Fail("Initial State test failed. Actual should look like Master image. Refer to logged images under:" + TestContext.TestLogsDir);

}

Download the full sample here. We would love to hear your feedback.