diff --git a/src/lib/depend-inject.hpp b/src/lib/depend-inject.hpp
index 8ef9f8dd6..2cc05e43a 100644
--- a/src/lib/depend-inject.hpp
+++ b/src/lib/depend-inject.hpp
@@ -285,7 +285,7 @@ namespace lib {
        * instance of the `MOC` subclass, which it manages and exposes like a smart-ptr.
        * When the handle goes out of scope, the original state and configuration is restored
        */
-      template<class MOC>
+      template<class MOC =SRV>
       class Local
         : util::MoveOnly
         {
diff --git a/tests/gui/interact/view-spec-dsl-test.cpp b/tests/gui/interact/view-spec-dsl-test.cpp
index c0b8fd29f..cf6459a95 100644
--- a/tests/gui/interact/view-spec-dsl-test.cpp
+++ b/tests/gui/interact/view-spec-dsl-test.cpp
@@ -29,15 +29,20 @@
 #include "lib/test/test-helper.hpp"
 #include "gui/interact/view-spec-dsl.hpp"
 #include "gui/interact/ui-coord.hpp"
+#include "gui/interact/gen-node-location-query.hpp"
+#include "lib/depend-inject.hpp"
 #include "lib/format-cout.hpp"
 //#include "lib/idi/entry-id.hpp"
 //#include "lib/diff/gen-node.hpp"
 //#include "lib/util.hpp"
 
 //#include <string>
+//#include <vector>
 
 
-//using std::string;
+using std::string;
+using lib::diff::MakeRec;
+using lib::diff::Rec;
 //using lib::idi::EntryID;
 //using lib::diff::GenNode;
 //using util::isSameObject;
@@ -51,6 +56,8 @@ namespace test {
 //  using lumiera::error::LUMIERA_ERROR_WRONG_TYPE;
   using lib::test::showSizeof;
   
+  using MockLoationSolver = lib::DependInject<UILocationSolver>::Local<>;
+  
   namespace { //Test fixture...
     
   }//(End)Test fixture
@@ -86,6 +93,21 @@ namespace test {
       void
       verify_standardUsage()
         {
+           //-------------------------------------------------------------Test-Fixture
+          // a Test dummy placeholder for the real UI structure
+          Rec dummyUiStructure = MakeRec()
+                                   .set("win-1"
+                                       , MakeRec()
+                                           .type("perspective")
+                                           .set("parentLocation", MakeRec())
+                                       );
+          // answer "location queries" backed by this structure
+          GenNodeLocationQuery locationQuery{dummyUiStructure};
+          MockLoationSolver mock ([&]{ return new UILocationSolver{locationQuery}; });
+          //--------------------------------------------------------------(End)Test-Fixture
+          
+          
+          
           uint allocCounter = 0;
           
           // Simulation/Example for an allocator-builder
@@ -96,8 +118,6 @@ namespace test {
                                                 else
                                                   return target.tab(limit);
                                               };
-          /////////TODO verify this...
-          cout << showSizeof(limitAllocation) <<endl;
           
           // the actual View Specification would then be written as...
           ViewSpec locate = UICoord::currentWindow().panel("parentLocation");
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 29201102e..8474625d6 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -10871,14 +10871,21 @@
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1519347191513" ID="ID_1058958215" MODIFIED="1520222272574" TEXT="Zugang zum LocationSolver">
+<node COLOR="#338800" CREATED="1519347191513" ID="ID_1058958215" MODIFIED="1522883286186" TEXT="Zugang zum LocationSolver">
 <arrowlink COLOR="#33a0d6" DESTINATION="ID_1459009906" ENDARROW="Default" ENDINCLINATION="766;0;" ID="Arrow_ID_393354619" STARTARROW="None" STARTINCLINATION="-338;0;"/>
 <linktarget COLOR="#3391c4" DESTINATION="ID_1058958215" ENDARROW="Default" ENDINCLINATION="356;0;" ID="Arrow_ID_1958186293" SOURCE="ID_782466951" STARTARROW="None" STARTINCLINATION="40;166;"/>
+<icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1519347295051" ID="ID_846050459" MODIFIED="1522808896717" TEXT="im realen UI">
 <icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#fdfdcf" COLOR="#ff0000" CREATED="1519347289508" ID="ID_723600288" MODIFIED="1522809238028" TEXT="setup f&#xfc;r Unit-Test">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1519347289508" FOLDED="true" ID="ID_723600288" MODIFIED="1522883307177" TEXT="setup f&#xfc;r Unit-Test">
+<icon BUILTIN="button_ok"/>
+<node COLOR="#338800" CREATED="1522883291235" ID="ID_543936991" MODIFIED="1522883304073" TEXT="GenNodeLocationQuery">
+<icon BUILTIN="button_ok"/>
+</node>
+<node COLOR="#338800" CREATED="1522883297346" ID="ID_1901671292" MODIFIED="1522883303346" TEXT="darauf aufbauender Mock">
+<icon BUILTIN="button_ok"/>
+</node>
 </node>
 </node>
 <node COLOR="#338800" CREATED="1519347266311" ID="ID_1347610352" MODIFIED="1522808950831" TEXT="Funktor-Anwendung implementieren">
@@ -11830,14 +11837,15 @@
 </node>
 </node>
 </node>
-<node CREATED="1506182023288" ID="ID_1539184761" MODIFIED="1518487921072" TEXT="ViewSpecDSL_test">
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1506182023288" ID="ID_1539184761" MODIFIED="1522883337660" TEXT="ViewSpecDSL_test">
+<icon BUILTIN="pencil"/>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1506182077694" ID="ID_839824654" MODIFIED="1518487921072" TEXT="verify_basicProperties">
 <icon BUILTIN="flag-yellow"/>
 <node CREATED="1515633695710" ID="ID_1540478220" MODIFIED="1518487921072" TEXT="aus standardUsage ablzuleiten"/>
 <node CREATED="1515633710396" ID="ID_335824710" MODIFIED="1518487921072" TEXT="spezifiziert die formalen Basis-Eigenschaften"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1506182037003" ID="ID_439307131" MODIFIED="1518487921072" TEXT="verify_standardUsage">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1506182037003" ID="ID_439307131" MODIFIED="1522883325632" TEXT="verify_standardUsage">
+<icon BUILTIN="button_ok"/>
 <node CREATED="1515633645885" ID="ID_1659749577" MODIFIED="1518487921072" TEXT="einfaches Dummy-Setup"/>
 <node CREATED="1515633651212" ID="ID_704575529" MODIFIED="1518487921072" TEXT="erlaubt, die Strukturen zu bauen"/>
 <node CREATED="1515633658483" ID="ID_149158343" MODIFIED="1518487921072" TEXT="l&#xe4;uft ohne die UI-Backbone">