public void TestThatGeneratePreviewLayerGeneratesPreviewLayer() { BitmapManager bitmapManager = new BitmapManager { ActiveDocument = new Document(10, 10) }; bitmapManager.GeneratePreviewLayer(); Assert.NotNull(bitmapManager.PreviewLayer); Assert.Equal(0, bitmapManager.PreviewLayer.Width + bitmapManager.PreviewLayer.Height); //Size is zero Assert.Equal(0, bitmapManager.PreviewLayer.OffsetX + bitmapManager.PreviewLayer.OffsetY); //Offset is zero Assert.Equal(bitmapManager.ActiveDocument.Width, bitmapManager.PreviewLayer.MaxWidth); Assert.Equal(bitmapManager.ActiveDocument.Height, bitmapManager.PreviewLayer.MaxHeight); }