How do I access a MessageBox with white? - wpf

Question

I have a simple message box in a WPF application that is launched as below:
private void Button_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("Howdy", "Howdy");
}
I can get white to click my button and launch the message box.
UISpy shows it as a child of my window I couldn't work out the method to access it.
How do I get access to my MessageBox to verify its contents?

Answer 1

Found it! The window class has a MessageBox method that does the trick:
var app = Application.Launch(#"c:\ApplicationPath.exe");
var window = app.GetWindow("Window1");
var helloButton = window.Get<Button>("Hello");
Assert.IsNotNull(helloButton);
helloButton.Click();
var messageBox = window.MessageBox("Howdy");
Assert.IsNotNull(messageBox);

Answer 2

Please try this
Window messageBox = window.MessageBox("");
var label = messageBox.Get<Label>(SearchCriteria.Indexed(0));
Assert.AreEqual("Hello",label.Text);

Answer 3

Contained in the White source code are some UI tests projects (to test White itself).
One of the test includes MessageBox tests, which includes a way to obtain the displayed message.
[TestFixture, WinFormCategory, WPFCategory]
public class MessageBoxTest : ControlsActionTest
{
[Test]
public void CloseMessageBoxTest()
{
window.Get<Button>("buttonLaunchesMessageBox").Click();
Window messageBox = window.MessageBox("Close Me");
var label = window.Get<Label>("65535");
Assert.AreEqual("Close Me", label.Text);
messageBox.Close();
}
[Test]
public void ClickButtonOnMessageBox()
{
window.Get<Button>("buttonLaunchesMessageBox").Click();
Window messageBox = window.MessageBox("Close Me");
messageBox.Get<Button>(SearchCriteria.ByText("OK")).Click();
}
}
Evidently, the label used to display the text message is owned by the window displaying the messagebox, and its primary identification is the max word value (65535).

Answer 4

window.MessageBox() is a good solution!!
But this method would stuck for a long time if the messagebox doesn't appear. Sometimes I want to check "Not Appearance" of a messagebox (Warning, Error, etc.). So I write a method to set the timeOut by threading.
[TestMethod]
public void TestMethod()
{
// arrange
var app = Application.Launch(#"c:\ApplicationPath.exe");
var targetWindow = app.GetWindow("Window1");
Button button = targetWindow.Get<Button>("Button");
// act
button.Click();
var actual = GetMessageBox(targetWindow, "Application Error", 1000L);
// assert
Assert.IsNotNull(actual); // I want to see the messagebox appears.
// Assert.IsNull(actual); // I don't want to see the messagebox apears.
}
private void GetMessageBox(Window targetWindow, string title, long timeOutInMillisecond)
{
Window window = null ;
Thread t = new Thread(delegate()
{
window = targetWindow.MessageBox(title);
});
t.Start();
long l = CurrentTimeMillis();
while (CurrentTimeMillis() - l <= timeOutInMillsecond) { }
if (window == null)
t.Abort();
return window;
}
public static class DateTimeUtil
{
private static DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
public static long currentTimeMillis()
{
return (long)((DateTime.UtcNow - Jan1st1970).TotalMilliseconds);
}
}