/// <summary>
/// Compare Capture.Rectangle(element.Bounds) to the expected image.
/// </summary>
/// <param name="fileName">Can be a full file name relative filename or the name of a resource.</param>
/// <param name="element">The UIElement.</param>
/// <param name="onFail">Useful for saving the actual image on error for example.</param>
public static void AreEqual(string fileName, System.Windows.UIElement element, Action <Exception, Bitmap> onFail)
{
if (TryGetStream(fileName, Assembly.GetCallingAssembly(), out var stream))
{
using (stream)
{
using (var expected = (Bitmap)Image.FromStream(stream))
{
using (var actual = element.ToBitmap(expected.Size(), expected.PixelFormat()))
{
try
{
AreEqual(expected, actual);
}
catch (Exception e)
{
onFail(e, actual);
throw;
}
}
}
}
}
else
{
var exception = AssertException.Create($"Did not find a file nor resource named {fileName}");
using (var actual = element.ToBitmap(element.RenderSize, GetPixelFormat(fileName)))
{
onFail(exception, actual);
}
throw exception;
}
}
/// <summary>
/// Compare Capture.Rectangle(element.Bounds) to the expected image.
/// </summary>
/// <param name="fileName">Can be a full file name relative filename or the name of a resource.</param>
/// <param name="element">The UIElement.</param>
public static void AreEqual(string fileName, System.Windows.UIElement element)
{
if (TryGetStream(fileName, Assembly.GetCallingAssembly(), out var stream))
{
using (stream)
{
using (var expected = (Bitmap)Image.FromStream(stream))
{
switch (OnFail)
{
case OnFail.DoNothing:
AreEqual(expected, element);
break;
case OnFail.SaveImageToTemp:
using (var actual = element.ToBitmap(expected.Size(), expected.PixelFormat()))
{
AreEqual(expected, actual, (bitmap) => bitmap.Save(TempFileName(fileName), GetImageFormat(fileName)));
}
break;
default:
throw new InvalidOperationException($"Not handling OnFail {OnFail}");
}
}
}
}
else
{
using (var actual = element.ToBitmap(element.RenderSize, GetPixelFormat(fileName)))
{
actual.Save(TempFileName(fileName), GetImageFormat(fileName));
}
throw AssertException.Create($"Did not find a file nor resource named {fileName}");
}
}
public static void AreEqual(Bitmap expected, System.Windows.UIElement actual)
{
using (var actualBmp = actual.ToBitmap(expected.Size(), expected.PixelFormat()))
{
if (Equal(expected, actualBmp))
{
return;
}
var start = DateTime.Now;
while (!Retry.IsTimeouted(start, RetryTime))
{
if (Equal(expected, actualBmp))
{
return;
}
Wait.For(Retry.PollInterval);
}
AreEqual(expected, actualBmp);
}
}