Added InterfaceImplementationTests unit test.

Author: issafram

RestSharp.Tests/InterfaceImplementationTests.cs

@@ -0,0 +1,35 @@
+namespace RestSharp.Tests
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Reflection;
+    using Xunit;
+
+    public class InterfaceImplementationTests
+    {
+        [Fact]
+        public void IRestSharp_Has_All_RestSharp_Signatures()
+        {
+            // Arrange
+            var restClientImplementationType = typeof(RestClient);
+            var restClientInterfaceType = typeof(IRestClient);
+            var bindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly;
+
+            // Act
+            IEnumerable<string> compareResult = CompareTypes(restClientImplementationType, restClientInterfaceType, bindingFlags);
+            compareResult.ToList().ForEach(x => Console.WriteLine("Method {0} exists in {1} but not in {2}", x, restClientImplementationType.FullName, restClientInterfaceType.FullName));
+
+            // Assert
+            Assert.Equal(0, compareResult.Count());
+        }
+
+        private static IEnumerable<string> CompareTypes(Type type1, Type type2, BindingFlags bindingFlags)
+        {
+            MethodInfo[] typeTMethodInfo = type1.GetMethods(bindingFlags);
+            MethodInfo[] typeXMethodInfo = type2.GetMethods(bindingFlags);
+
+            return typeTMethodInfo.Select(x => x.Name).Except(typeXMethodInfo.Select(x => x.Name));
+        }
+    }
+}

RestSharp.Tests/RestSharp.Tests.csproj

@@ -81,6 +81,7 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="InterfaceImplementationTests.cs" />
     <Compile Include="OAuthTests.cs" />
     <Compile Include="SampleClasses\EmployeeTracker.cs" />
     <Compile Include="SampleClasses\EnumTest.cs" />