Develop/issue 502

Test/Mono.Cecil.Tests/InterfaceContract.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+
+using NUnit.Framework;
+
+namespace Mono.Cecil.Tests {
+
+	[TestFixture]
+	public class InterfaceContract {
+
+		private IEnumerable<TypeDefinition> GetNestedTypes (TypeDefinition main)
+		{
+			return main.NestedTypes.SelectMany (t => GetNestedTypes (t)).Concat (new [] { main });
+		}
+
+		[Test]
+		public void EnsureConsistentVersioning ()
+		{
+			var cecilDll = typeof (Mono.TypeExtensions).Assembly.Location;
+			var assembly = AssemblyDefinition.ReadAssembly (cecilDll);
+			var version = assembly.Name;
+			var visibleTypes = assembly.Modules
+				.SelectMany (m => m.Types)
+				.SelectMany (GetNestedTypes)
+				.Where (t => !t.IsNestedPrivate && !t.IsNestedFamily)
+				.OrderBy (t => t.FullName)
+				.ToList ();
+			var visibleFields = visibleTypes
+				.SelectMany (t => t.Fields)
+				.Where (m => m.IsPublic || m.IsAssembly)
+				.OrderBy (t => t.FullName)
+				.ToList ();
+			var visibleMethods = visibleTypes
+				.SelectMany (t => t.Methods)
+				.Where (m => m.IsPublic || m.IsAssembly)
+				.OrderBy (t => t.FullName)
+				.ToList ();
+
+			byte [] signature = null;
+
+			using (var hash = SHA256.Create ()) {
+				visibleTypes.ForEach (t => {
+					var ta = Encoding.UTF8.GetBytes (t.FullName);
+					hash.TransformBlock (ta, 0, ta.Length, ta, 0);
+				});
+
+				visibleFields.ForEach (t => {
+					var ta = Encoding.UTF8.GetBytes (t.FullName);
+					hash.TransformBlock (ta, 0, ta.Length, ta, 0);
+				});
+
+				visibleMethods.ForEach (t => {
+					var ta = Encoding.UTF8.GetBytes (t.FullName);
+					hash.TransformBlock (ta, 0, ta.Length, ta, 0);
+				});
+
+				var a = Encoding.UTF8.GetBytes (version.FullName);
+				hash.TransformFinalBlock (a, 0, a.Length);
+
+				signature = hash.Hash;
+			}
+
+			StringBuilder str = new StringBuilder ();
+			Array.ForEach (signature,
+				i => str.AppendFormat ("{0:X2}", i));
+			var result = str.ToString ();
+
+			// for version 0.10.0-beta7 'Mono.Cecil, Version=0.10.0.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e'
+			// var expected = "73749C57E84195F3998A7BE05EB137E74D60A545731479D3FF8D00FDAF35FAE2";
+
+			// for version 0.10.0 'Mono.Cecil, Version=0.10.0.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e'
+			var expected = "935E6F60AA5612F4170558B73CE7ADB4F92E4644B2AD175302B2FDEDBF1E4331";
+
+			Assert.That (result, Is.EqualTo (expected),
+				"The interface signature has changed and is now '" +
+				result + "'.  If there has been a public release, " +
+				"increment the assembly version from '" +
+				version.FullName +
+				"' to reflect this fact," +
+				"then rerun this test and record the new value from this failure." +
+				"Update 'expected' with that value, and verify that the test is now clean."
+				);
+		}
+	}
+}