From d2f7eda07474295d66e7f507956690456bd32359 Mon Sep 17 00:00:00 2001
From: Sebastiaan Janssen <sebastiaan@umbraco.com>
Date: Wed, 15 Jul 2015 10:58:38 +0200
Subject: [PATCH] Fixes unit test that failed because
 HostingEnvironment.ApplicationID is null in unit tests

---
 src/Umbraco.Core/MainDom.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Core/MainDom.cs b/src/Umbraco.Core/MainDom.cs
index ca0ecb33fe..9eec3d4da6 100644
--- a/src/Umbraco.Core/MainDom.cs
+++ b/src/Umbraco.Core/MainDom.cs
@@ -43,7 +43,10 @@ namespace Umbraco.Core
         // initializes a new instance of MainDom
         public MainDom()
         {
-            var appId = HostingEnvironment.ApplicationID.ReplaceNonAlphanumericChars(string.Empty);
+            var appId = string.Empty;
+            // HostingEnvironment.ApplicationID is null in unit tests, making ReplaceNonAlphanumericChars fail
+            if (HostingEnvironment.ApplicationID != null)
+                appId = HostingEnvironment.ApplicationID.ReplaceNonAlphanumericChars(string.Empty);
 
             var lockName = "UMBRACO-" + appId + "-MAINDOM-LCK";
             _asyncLock = new AsyncLock(lockName);