Enable tests to control what build server to "use"

Author: andreasohlund

GitFlowVersion/BuildServers/BuildServerList.cs

@@ -1,5 +1,6 @@
 namespace GitFlowVersion
 {
+    using System;
     using System.Collections.Generic;
 
     public static class BuildServerList
@@ -10,7 +11,19 @@ public static class BuildServerList
                 new TeamCity()
             };
 
+        public static Func<IEnumerable<IBuildServer>> Selector = () => DefaultSelector();
+
+        public static void ResetSelector()
+        {
+            Selector = DefaultSelector;
+        }
+
         public static IEnumerable<IBuildServer> GetApplicableBuildServers()
+        {
+            return Selector();
+        }
+
+        static IEnumerable<IBuildServer> DefaultSelector()
         {
             foreach (var buildServer in BuildServers)
             {

Tests/UpdateAssemblyInfoTests.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using GitFlowVersion;
@@ -101,6 +102,19 @@ public void StandardExecutionMode_CannotDetermineTheVersionFromADetachedHead()
         Assert.AreEqual("It looks like the branch being examined is a detached Head pointing to commit '469f851'. Without a proper branch name GitFlowVersion cannot determine the build version.", exception.Message);
     }
 
+    [SetUp]
+    public void SetUp()
+    {
+        //avoid buildserver detection to make the tests pass on the buildserver
+        BuildServerList.Selector = () => new List<IBuildServer>();
+    }
+
+
+    [TearDown]
+    public void TearDown()
+    {
+        BuildServerList.ResetSelector();
+    }
     string CheckoutLocal(string repositoryPath, string monitoredReference)
     {
         var repoPath = Clone(repositoryPath);