Fix bug with incorrect trimming of root key from config keys. (#62)

Author: Choc13

src/Winton.Extensions.Configuration.Consul/Extensions/KVPairExtensions.cs

@@ -23,7 +23,7 @@ internal static IEnumerable<KeyValuePair<string, string>> ConvertToConfig(
                     .Select(
                         pair =>
                         {
-                            string key = $"{kvPair.Key.TrimStart(rootKey.ToCharArray()).TrimEnd('/')}:{pair.Key}"
+                            string key = $"{kvPair.Key.RemoveStart(rootKey).TrimEnd('/')}:{pair.Key}"
                                 .Replace('/', ':')
                                 .Trim(':');
                             if (string.IsNullOrEmpty(key))
@@ -46,5 +46,10 @@ internal static bool IsLeafNode(this KVPair kvPair)
         {
             return !kvPair.Key.EndsWith("/");
         }
+
+        private static string RemoveStart(this string s, string toRemove)
+        {
+            return s.StartsWith(toRemove) ? s.Remove(0, toRemove.Length) : s;
+        }
     }
 }

test/Winton.Extensions.Configuration.Consul.Test/Extensions/KVPairExtensionsTests.cs

@@ -53,6 +53,16 @@ public ConvertToConfig()
                     }
                 },
                 new object[]
+                {
+                    "RootKey/Settings",
+                    "RootKey/Settings/Root",
+                    new Dictionary<string, string> { { "Key", "value" } },
+                    new[]
+                    {
+                        new KeyValuePair<string, string>("Root:Key", "value")
+                    }
+                },
+                new object[]
                 {
                     "rootKey",
                     "rootKey",