unit-test: Fix bug when endpoint empty

Could debate the proper handling of this situations but this commit at
least makes it consistent for the forward and reverse path

Change-Id: If0a8a16473c150f4d4361f9ca9aad9f06c391157
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/src/associations.cpp b/src/associations.cpp
index 6982b52..b4c0fae 100644
--- a/src/associations.cpp
+++ b/src/associations.cpp
@@ -156,18 +156,17 @@
         std::string endpoint;
         std::tie(forward, reverse, endpoint) = association;
 
+        if (endpoint.empty())
+        {
+            std::cerr << "Found invalid association on path " << path << "\n";
+            continue;
+        }
         if (forward.size())
         {
             objects[path + "/" + forward].emplace(endpoint);
         }
         if (reverse.size())
         {
-            if (endpoint.empty())
-            {
-                std::cerr << "Found invalid association on path " << path
-                          << "\n";
-                continue;
-            }
             objects[endpoint + "/" + reverse].emplace(path);
         }
     }