White Framework +1 !!
You can check my answer I posted for asserting a message box and use messageBox.Get() method to click Ok button.
Ref: https://stackoverflow.com/a/35219222/2902212
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);
}
}