From 8cd31443b1a6f153c6479dd3600b7d4e0d36f14e Mon Sep 17 00:00:00 2001
From: Ichthyostega <prg@ichthyostega.de>
Date: Sat, 26 Dec 2015 20:41:24 +0100
Subject: [PATCH] invent a suicidal zombie terminal

yeah, it's X-mas time,
letz build a diagnostic network of deceased widgets...
---
 tests/gui/abstract-tangible-test.cpp |  4 +-
 tests/gui/test/mock-elm.hpp          | 40 +++++++++++++-
 tests/gui/test/test-nexus.cpp        | 83 +++++++++++++++++++++++++++-
 tests/gui/test/test-nexus.hpp        |  5 +-
 4 files changed, 124 insertions(+), 8 deletions(-)

diff --git a/tests/gui/abstract-tangible-test.cpp b/tests/gui/abstract-tangible-test.cpp
index 99441382c..affa3e4ae 100644
--- a/tests/gui/abstract-tangible-test.cpp
+++ b/tests/gui/abstract-tangible-test.cpp
@@ -195,8 +195,8 @@ namespace test {
           
           mock.kill();
           foo.markMsg("dummy killed");
-          CHECK (log.verifyEvent("dtor").on("dummy")
-                    .beforeCall("noteMsg").on("foo"));
+          CHECK (log.verifyEvent("destroy","dummy")
+                    .beforeCall("doMsg").on("foo"));
         }
       
       
diff --git a/tests/gui/test/mock-elm.hpp b/tests/gui/test/mock-elm.hpp
index 90fc49a0b..7cdd0e319 100644
--- a/tests/gui/test/mock-elm.hpp
+++ b/tests/gui/test/mock-elm.hpp
@@ -182,20 +182,54 @@ namespace test{
       MockElm(ID identity, ctrl::BusTerm& nexus  =Nexus::testUI())
         : gui::model::Tangible(identity, nexus)
         {
-          log_.call(this->identify(), "ctor", identity, string(nexus));
-          log_.create(getID().getSym());
+          log_.call (this->identify(), "ctor", identity, string(nexus));
+          log_.create (getID().getSym());
         }
       
       
+      /** document our death in the diagnostic log. */
+     ~MockElm()
+        {
+          try {
+            log_.call (this->identify(), "dtor");
+            log_.destroy (getID().getSym());
+            }
+          catch(...)
+            {
+              const char* errID = lumiera_error();
+              if (errID)
+                cerr << "Error while logging shutdown of Mock-UI-Element: " << errID <<endl;
+              else
+                cerr << "Unknown Error while logging shutdown of Mock-UI-Element." <<endl;
+            }
+        }
+      
+      
+      
+      
       /* ==== special operations API ==== */
       
+      /** commit suicide.
+       * @warning admittedly a wonky operation
+       * @remarks here the mock emulates the act of dying,
+       *          by snuffing the UI-Bus connection sneakily.
+       *          We leave the dead corpse hanging around,
+       *          just for sake of further investigation,
+       *          of course.
+       */
       void
       kill()
         {
-          UNIMPLEMENTED ("suicide");
+          log_.call (this->identify(), "kill");
+          log_.destroy (getID().getSym());
+          
+          Nexus::zombificate (this->uiBus_);
+          log_.event ("successfully connected to zombie bus");
         }
       
       
+      
+      
       /* ==== Query/Verification API ==== */
       
       ID getID()  const
diff --git a/tests/gui/test/test-nexus.cpp b/tests/gui/test/test-nexus.cpp
index 443a02054..8761bd329 100644
--- a/tests/gui/test/test-nexus.cpp
+++ b/tests/gui/test/test-nexus.cpp
@@ -52,6 +52,7 @@ using std::string;
 
 //using lib::idi::EntryID;
 using lib::diff::GenNode;
+using gui::ctrl::BusTerm;
 //using util::contains;
 //using util::isnil;
 
@@ -86,8 +87,8 @@ namespace test{
           {
             UNIMPLEMENTED ("receive and handle presentation state note messages.");
           }
-      
-      
+        
+        
         virtual operator string()  const
           {
             return lib::idi::instanceTypeID(this);
@@ -99,6 +100,69 @@ namespace test{
           { }
       };
     
+    
+    /**
+     * @internal a defunct interface backbone.
+     * All UI-Bus operations are implemented NOP, but warning on STDRR
+     * and logging the invocation to the internal log of [TestNexus].
+     * This allows to set up deceased entities within a test rigged UI.
+     */
+    class ZombieNexus
+      : public BusTerm
+      {
+        
+        /* ==== defunct re-implementation of the BusTerm interface ==== */
+        
+        virtual void
+        act (GenNode const& command)
+          {
+            UNIMPLEMENTED("act");
+          }
+        
+        
+        virtual void
+        note (ID subject, GenNode const& mark)  override
+          {
+            UNIMPLEMENTED ("note.");
+          }
+        
+        
+        virtual void
+        mark (ID subject, GenNode const& mark)  override
+          {
+            UNIMPLEMENTED ("mark.");
+          }
+        
+        
+        virtual operator string()  const
+          {
+            return lib::idi::instanceTypeID(this);
+          }
+        
+        
+        virtual BusTerm&
+        routeAdd (ID identity, Tangible& newNode)  override
+          {
+            UNIMPLEMENTED ("routeAdd.");
+          }
+        
+        
+        virtual void
+        routeDetach (ID node)  noexcept override
+          {
+            UNIMPLEMENTED ("routeDetach.");
+          }
+        
+      public:
+        /** fabricate a "dead terminal", marked as deceased.
+         * @note intentionally to be sliced right after generation.
+         *       All operations on this object are defunct.
+         */
+        ZombieNexus(string formerID)
+          : BusTerm(lib::idi::EntryID<ZombieNexus>("defunct-"+formerID), *this)
+          { }
+      };
+    
     lib::Depend<TestNexus> testNexus;
     
   } // internal details
@@ -119,5 +183,20 @@ namespace test{
   {
     return testNexus();
   }
+  
+  
+  /**
+   * @return a defunct BusTerm with up-link to [ZombieNexus]
+   * @remarks useful to create zombie mock UI-Elements for testing.
+   */
+  void
+  Nexus::zombificate (BusTerm& doomed)
+  {
+    string lateName = doomed.getID().getSym();
+    doomed.~BusTerm();
+//  log_.destroy (lateName);
+    
+    new(&doomed) ZombieNexus{lateName};
+  }
 
 }} // namespace gui::test
diff --git a/tests/gui/test/test-nexus.hpp b/tests/gui/test/test-nexus.hpp
index 7a08c3b0e..9640ffdc1 100644
--- a/tests/gui/test/test-nexus.hpp
+++ b/tests/gui/test/test-nexus.hpp
@@ -50,7 +50,7 @@
 //#include "lib/diff/record.hpp"
 
 #include <boost/noncopyable.hpp>
-//#include <string>
+#include <string>
 
 
 namespace gui {
@@ -78,6 +78,9 @@ namespace test{
     public:
       /** get a connection point to a UI backbone faked for test */
       static ctrl::BusTerm& testUI();
+      
+      /** kill the given [BusTerm] and implant a dead terminal in place */
+      static void zombificate(ctrl::BusTerm&);
     };