Add PrepareQueryWill test for double and decimal and float

Author: rolfwessels

NRedisGraph.Tests/RedisGraphUtilitiesTests.cs

@@ -48,6 +48,19 @@ public void ProperlyFormatParameters(IDictionary<string, object> parameters, str
                 "CYPHER param=2.3 RETURN $param"
             },
 
+            new object[]
+            {
+                new Dictionary<string, object> {{"param", 2.42m}},
+                "CYPHER param=2.42 RETURN $param"
+            },
+
+
+            new object[]
+            {
+                new Dictionary<string, object> {{"param", 2.2f}},
+                "CYPHER param=2.2 RETURN $param"
+            },
+
             new object[]
             {
                 new Dictionary<string, object> {{"param", true}},
@@ -89,7 +102,13 @@ public void ProperlyFormatParameters(IDictionary<string, object> parameters, str
                 new Dictionary<string, object> {{"param", new List<int> {1, 2, 3}}},
                 "CYPHER param=[1, 2, 3] RETURN $param"
             },
-            
+
+            new object[]
+            {
+                new Dictionary<string, object> {{"param", new List<decimal> {1, 2.2m, 3.3m}}},
+                "CYPHER param=[1, 2.2, 3.3] RETURN $param"
+            },
+
             new object[]
             {
                 new Dictionary<string, object> {{"param", new[] {"1", "2", "3"}}},

NRedisGraph/RedisGraphUtilities.cs

@@ -2,6 +2,7 @@
 using System.Linq;
 using System.Collections;
 using System.Collections.Generic;
+using System.Globalization;
 
 namespace NRedisGraph
 {
@@ -72,6 +73,21 @@ internal static string ValueToString(object value)
                 return boolValue.ToString().ToLowerInvariant();
             }
 
+            if (value is float floatValue)
+            {
+                return floatValue.ToString(CultureInfo.InvariantCulture);
+            } 
+
+            if (value is decimal decimalValue)
+            {
+                return decimalValue.ToString(CultureInfo.InvariantCulture);
+            }
+
+            if (value is double doubleValue)
+            {
+                return doubleValue.ToString(CultureInfo.InvariantCulture);
+            }
+
             return value.ToString();
         }