Added testcases for QR codes with logos/icons

Author: codebude

QRCoderTests/QRCodeRendererTests.cs

@@ -5,6 +5,9 @@
 using QRCoderTests.XUnitExtenstions;
 using System.IO;
 using System.Security.Cryptography;
+#if !NETCOREAPP1_1
+using System.Drawing;
+#endif
 
 namespace QRCoderTests
 {
@@ -30,6 +33,62 @@ public void can_create_standard_qrcode_graphic()
 
             result.ShouldBe("41d3313c10d84034d67d476eec04163f");
         }
+
+        [Fact]
+        [Category("QRRenderer/QRCode")]
+        public void can_create_qrcode_with_transparent_logo_graphic()
+        {
+            //Create dummy logo
+            var logo = new Bitmap(32, 32);
+            var gfx = Graphics.FromImage(logo);
+            gfx.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+            gfx.FillRectangle(Brushes.Transparent, new Rectangle(0, 0, 32, 32));
+            gfx.FillEllipse(Brushes.Red, new Rectangle(0, 0, 32, 32));
+            gfx.Save();
+
+            //Create QR code
+            var gen = new QRCodeGenerator();
+            var data = gen.CreateQrCode("This is a quick test! 123#?", QRCodeGenerator.ECCLevel.H);
+            var bmp = new QRCode(data).GetGraphic(10, Color.Black, Color.Transparent, icon: logo);
+
+            var ms = new MemoryStream();
+            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
+            var imgBytes = ms.ToArray();
+            var md5 = new MD5CryptoServiceProvider();
+            var hash = md5.ComputeHash(imgBytes);
+            var result = BitConverter.ToString(hash).Replace("-", "").ToLower();
+            ms.Dispose();
+
+            result.ShouldBe("8f03d2c3fc5998cebb46658c3e6293b1");
+        }
+
+        [Fact]
+        [Category("QRRenderer/QRCode")]
+        public void can_create_qrcode_with_non_transparent_logo_graphic()
+        {
+            //Create dummy logo
+            var logo = new Bitmap(32, 32);
+            var gfx = Graphics.FromImage(logo);
+            gfx.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+            gfx.FillRectangle(Brushes.White, new Rectangle(0, 0, 32, 32));
+            gfx.FillEllipse(Brushes.Red, new Rectangle(0, 0, 32, 32));
+            gfx.Save();
+
+            //Create QR code
+            var gen = new QRCodeGenerator();
+            var data = gen.CreateQrCode("This is a quick test! 123#?", QRCodeGenerator.ECCLevel.H);
+            var bmp = new QRCode(data).GetGraphic(10, Color.Black, Color.White, icon: logo);
+
+            var ms = new MemoryStream();
+            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
+            var imgBytes = ms.ToArray();
+            var md5 = new MD5CryptoServiceProvider();
+            var hash = md5.ComputeHash(imgBytes);
+            var result = BitConverter.ToString(hash).Replace("-", "").ToLower();
+            ms.Dispose();
+
+            result.ShouldBe("c2aae3658c7fa20cb5d22948d859c614");
+        }
 #endif
     }
 }