allow builder to override config

PactNetMessages.Tests/PactMessageBuilderTests.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+
+namespace PactNetMessages.Tests
+{
+    public class PactMessageBuilderTests
+    {
+        [Fact]
+        public void PactMessageBuilder_ReturnsDefaultConfig()
+        {
+            var defaultConfig = new PactConfig();
+            var builder = new PactMessageBuilder();
+
+            Assert.Equal(defaultConfig.PactDir, builder.pactConfig.PactDir);
+        }
+
+        [Fact]
+        public void PactMEssageBuilder_OverrideConfig()
+        {
+            var customConfig = new PactConfig();
+            customConfig.PactDir = "/customPactDir";
+
+            var builder = new PactMessageBuilder(customConfig);
+
+            Assert.Equal("/customPactDir", builder.pactConfig.PactDir);
+
+        }
+    }
+}

PactNetMessages/PactMessageBuilder.cs

@@ -13,16 +13,25 @@ public class PactMessageBuilder : IPactMessageBuilder
     {
         private readonly IMockMq mockMq;
 
-        private readonly PactConfig pactConfig;
+        public readonly PactConfig pactConfig;
 
         public string ConsumerName { get; private set; }
 
         public string ProviderName { get; private set; }
 
+        internal PactMessageBuilder(PactConfig config, MockMq mq)
+        {
+            pactConfig = config;
+            mockMq = mq;
+        }
         public PactMessageBuilder()
+            : this(new PactConfig(), new MockMq())
+        {
+        }
+
+        public PactMessageBuilder(PactConfig config)
+            : this(config, new MockMq())
         {
-            pactConfig = new PactConfig();
-            mockMq = new MockMq();
         }
 
         public IPactMessageBuilder ServiceConsumer(string consumerName)