private static void AreEqualImpl(
ScreenshotInfo expected,
Rectangle expectedRect,
ScreenshotInfo actual,
Rectangle actualRect,
double expectedToActualScale,
PixelTolerance tolerance,
[CallerLineNumber] int line = 0)
{
var actualBitmap = actual.GetBitmap();
AreEqualImpl(expected, expectedRect, actual, actualBitmap, actualRect, expectedToActualScale, tolerance, line);
}
private static PointF GetPixelPositionWithColor(ScreenshotInfo screenshotInfo, IAppRect boundingRect, Color expectedColor)
{
var bitmap = screenshotInfo.GetBitmap();
for (var x = boundingRect.X; x < boundingRect.Right; x++)
{
for (var y = boundingRect.Y; y < boundingRect.Bottom; y++)
{
var pixel = bitmap.GetPixel((int)x, (int)y);
if (pixel.ToArgb() == expectedColor.ToArgb())
{
return(new PointF(x, y));
}
}
}
throw new InvalidOperationException($"Color {expectedColor} was not found.");
}
private static (bool areEqual, string context) EqualityCheck(
ScreenshotInfo expected,
Rectangle expectedRect,
ScreenshotInfo?actual,
Bitmap actualBitmap,
Rectangle actualRect,
double expectedToActualScale,
PixelTolerance tolerance,
[CallerLineNumber] int line = 0)
{
var expectedBitmap = expected.GetBitmap();
if (expectedRect != FirstQuadrant && actualRect != FirstQuadrant)
{
Assert.AreEqual(expectedRect.Size, actualRect.Size, WithContext("Compare rects don't have the same size"));
}
if (expectedRect == FirstQuadrant && actualRect == FirstQuadrant)
{
var effectiveExpectedBitmapSize = new Size(
(int)(expectedBitmap.Size.Width * expectedToActualScale),
(int)(expectedBitmap.Size.Height * expectedToActualScale));
Assert.AreEqual(effectiveExpectedBitmapSize, actualBitmap.Size, WithContext("Screenshots don't have the same size"));
}
expectedRect = Normalize(expectedRect, expectedBitmap.Size);
actualRect = Normalize(actualRect, actualBitmap.Size);
var expectedPixels = ExpectedPixels
.At(actualRect.Location)
.Pixels(expectedBitmap, expectedRect)
.Named(expected.StepName)
.WithTolerance(tolerance);
var report = GetContext();
var result = Validate(expectedPixels, actualBitmap, expectedToActualScale, report);
return(result, report.ToString());
StringBuilder GetContext()
=> new StringBuilder()
.AppendLine($"ImageAssert.AreEqual @ line {line}")
.AppendLine("pixelTolerance: " + tolerance)
.AppendLine($"expected: {expected?.StepName} ({expected?.File.Name} {expectedBitmap.Size}){(expectedRect == FirstQuadrant ? null : $" in {expectedRect}")}")