NaN rules

Author: mgravell

tests/StackExchange.Redis.Tests/KeyAndValueTests.cs

@@ -64,6 +64,12 @@ public void TestValues()
 
     internal static void CheckSame(RedisValue x, RedisValue y)
     {
+        if (x.TryParse(out double value) && double.IsNaN(value))
+        {
+            // NaN has atypical equality rules
+            Assert.True(y.TryParse(out value) && double.IsNaN(value));
+            return;
+        }
         Assert.True(Equals(x, y), "Equals(x, y)");
         Assert.True(Equals(y, x), "Equals(y, x)");
         Assert.True(EqualityComparer<RedisValue>.Default.Equals(x, y), "EQ(x,y)");

tests/StackExchange.Redis.Tests/RedisValueEquivalencyTests.cs

@@ -137,11 +137,24 @@ static void Check(RedisValue known, RedisValue test)
 
         Check(double.NegativeInfinity, double.NegativeInfinity);
         Check(double.NegativeInfinity, "-inf");
+        Check(double.NegativeInfinity, Bytes("-inf"));
         CheckString(double.NegativeInfinity, "-inf");
 
         Check(double.PositiveInfinity, double.PositiveInfinity);
         Check(double.PositiveInfinity, "+inf");
+        Check(double.PositiveInfinity, "inf");
+        Check(double.PositiveInfinity, Bytes("+inf"));
+        Check(double.PositiveInfinity, Bytes("inf"));
         CheckString(double.PositiveInfinity, "+inf");
+
+        Check(double.NaN, double.NaN);
+        Check(double.NaN, "+nan");
+        Check(double.NaN, "-nan");
+        Check(double.NaN, "nan");
+        Check(double.NaN, Bytes("+nan"));
+        Check(double.NaN, Bytes("-nan"));
+        Check(double.NaN, Bytes("nan"));
+        CheckString(double.NaN, "NaN");
     }
 
     private static void CheckString(RedisValue value, string expected)