Add basic test for RouteValueEqualityComparer.Equals(...). (#883)

test/Microsoft.AspNetCore.Routing.Tests/RouteValueEqualityComparerTest.cs

@@ -0,0 +1,41 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Xunit;
+
+namespace Microsoft.AspNetCore.Routing
+{
+    public class RouteValueEqualityComparerTest
+    {
+        private readonly RouteValueEqualityComparer _comparer;
+
+        public RouteValueEqualityComparerTest()
+        {
+            _comparer = new RouteValueEqualityComparer();
+        }
+
+        [Theory]
+        [InlineData(5, 7, false)]
+        [InlineData("foo", "foo", true)]
+        [InlineData("foo", "FoO", true)]
+        [InlineData("foo", "boo", false)]
+        [InlineData("7", 7, true)]
+        [InlineData(7, "7", true)]
+        [InlineData(5.7d, 5.7d, true)]
+        [InlineData(null, null, true)]
+        [InlineData(null, "foo", false)]
+        [InlineData("foo", null, false)]
+        [InlineData(null, "", true)]
+        [InlineData("", null, true)]
+        [InlineData("", "", true)]
+        [InlineData("", "foo", false)]
+        [InlineData("foo", "", false)]
+        [InlineData(true, true, true)]
+        [InlineData(true, false, false)]
+        public void EqualsTest(object x, object y, bool expected)
+        {
+            var actual = _comparer.Equals(x, y);
+            Assert.Equal(expected, actual);
+        }
+    }
+}