Add helper method to register the TIFF format

src/ImageSharp/Configuration.cs

@@ -174,6 +174,17 @@ namespace SixLabors.ImageSharp
             };
         }
 
+        /// <summary>
+        /// Registers the TIFF format detector, decoder and encoder.
+        /// </summary>
+        public void AddTiff()
+        {
+            this.ImageFormatsManager.AddImageFormat(TiffFormat.Instance);
+            this.ImageFormatsManager.AddImageFormatDetector(new TiffImageFormatDetector());
+            this.ImageFormatsManager.SetDecoder(TiffFormat.Instance, new TiffDecoder());
+            this.ImageFormatsManager.SetEncoder(TiffFormat.Instance, new TiffEncoder());
+        }
+
         /// <summary>
         /// Creates the default instance with the following <see cref="IConfigurationModule"/>s preregistered:
         /// <see cref="PngConfigurationModule"/>

tests/ImageSharp.Tests/Formats/Tiff/ImageExtensionsTest.cs

@@ -18,10 +18,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tiff
         public ImageExtensionsTest()
         {
             this.configuration = new Configuration();
-            this.configuration.ImageFormatsManager.AddImageFormat(TiffFormat.Instance);
-            this.configuration.ImageFormatsManager.AddImageFormatDetector(new TiffImageFormatDetector());
-            this.configuration.ImageFormatsManager.SetDecoder(TiffFormat.Instance, new TiffDecoder());
-            this.configuration.ImageFormatsManager.SetEncoder(TiffFormat.Instance, new TiffEncoder());
+            this.configuration.AddTiff();
         }
 
         [Fact]

tests/ImageSharp.Tests/Formats/Tiff/TiffDecoderTests.cs

@@ -33,9 +33,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tiff
         public TiffDecoderTests()
         {
             this.configuration = new Configuration();
-            this.configuration.ImageFormatsManager.AddImageFormat(TiffFormat.Instance);
-            this.configuration.ImageFormatsManager.AddImageFormatDetector(new TiffImageFormatDetector());
-            this.configuration.ImageFormatsManager.SetDecoder(TiffFormat.Instance, new TiffDecoder());
+            this.configuration.AddTiff();
         }
 
         [Theory]

tests/ImageSharp.Tests/Formats/Tiff/TiffEncoderTests.cs

@@ -26,10 +26,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tiff
         public TiffEncoderTests()
         {
             this.configuration = new Configuration();
-            this.configuration.ImageFormatsManager.AddImageFormat(TiffFormat.Instance);
-            this.configuration.ImageFormatsManager.AddImageFormatDetector(new TiffImageFormatDetector());
-            this.configuration.ImageFormatsManager.SetDecoder(TiffFormat.Instance, new TiffDecoder());
-            this.configuration.ImageFormatsManager.SetEncoder(TiffFormat.Instance, new TiffEncoder());
+            this.configuration.AddTiff();
         }
 
         [Theory]

tests/ImageSharp.Tests/Formats/Tiff/TiffMetadataTests.cs

@@ -22,10 +22,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tiff
         public TiffMetadataTests()
         {
             this.configuration = new Configuration();
-            this.configuration.ImageFormatsManager.AddImageFormat(TiffFormat.Instance);
-            this.configuration.ImageFormatsManager.AddImageFormatDetector(new TiffImageFormatDetector());
-            this.configuration.ImageFormatsManager.SetDecoder(TiffFormat.Instance, new TiffDecoder());
-            this.configuration.ImageFormatsManager.SetEncoder(TiffFormat.Instance, new TiffEncoder());
+            this.configuration.AddTiff();
         }
 
         [Fact]