Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/test/System.Web.Http.Test/Common/ErrorTests.cs

@@ -0,0 +1,23 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+using Xunit;
+using Assert = Microsoft.TestCommon.AssertEx;
+
+namespace System.Web.Http
+{
+    public class ErrorTests
+    {
+        [Fact]
+        public void Format()
+        {
+            // Arrange
+            string expected = "The formatted message";
+
+            // Act
+            string actual = Error.Format("The {0} message", "formatted");
+
+            // Assert
+            Assert.Equal(expected, actual);
+        }
+    }
+}