Reading up on silverlight unittesting from Justin Angel’s post. I ran into some startup problems like not iheriting from SilverlightTest in my test class (took me two hours ;)) and adding the right assemblies to our project. But the biggest challenge was figuring out how each control could be addressed.

• TextBox, text input with Value pattern

// create an automationpeer for the control
var textBoxPeer = new TextBoxAutomationPeer(ctrl);
// create a valueprovider to fill the control
var textBoxProvider = (IValueProvider)textBoxPeer.GetPattern(PatternInterface.Value);
// fill some text
textBoxProvider.SetValue(fieldvalue);

• ComboBox, find child with value to select and use SelectionItem pattern

// create an automationpeer for the control
var comboBoxPeer = new ComboBoxAutomationPeer(ctrl);
// find the child with the value to set
var comboBoxSelectionItem = (ISelectionItemProvider)comboBoxPeer.GetChildren()
                .Where(x => x.GetName().Equals(valueToSelect))
                .First()  // will fail if valueToSelect is not found
                .GetPattern(PatternInterface.SelectionItem);
// select the value
hoursComboBoxSelectionItem.Select();

• RadioButton, select with the SelectionItem pattern. This raises the (Un)Checked event, not the Click event.

// create automationpeer for the control
var radioButtonPeer = new RadioButtonAutomationPeer(ctrl);
// create a selectionitemprovider to set the selection
var radioButtonProvider = (ISelectionItemProvider)radioButtonPeer.GetPattern(PatternInterface.SelectionItem);
// select the value
// this will NOT raise the Click event, but the CHECKED event
radioButtonProvider.Select();

• Button, click it with Invoke pattern

// create an automationpeer for the button
var buttonPeer = new ButtonAutomationPeer(ctrl);
// create am invokeprovider to click the control
var buttonInvoker = (IInvokeProvider)buttonPeer.GetPattern(PatternInterface.Invoke);
// check button is available
Assert.IsTrue(buttonPeer.IsEnabled(), "Button was not enabled");
// click the button
buttonInvoker.Invoke();

My next post is about custom AutomationPeer classes.