From c6945a452ebb21bda42103b6721f5984d87c08dc Mon Sep 17 00:00:00 2001
From: Ichthyostega <prg@ichthyostega.de>
Date: Sat, 2 Jan 2016 01:41:53 +0100
Subject: [PATCH] need helper functionality for tests to scrap existing log
 contents

...this is necessary whenever the mocked facility covered
by log matching is managed automatically as singleton,
because then other test cases will leave garbage
in the log
---
 src/lib/test/event-log.hpp                 | 28 ++++++++++++++++++++++
 tests/library/test/test-event-log-test.cpp | 20 ++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/src/lib/test/event-log.hpp b/src/lib/test/event-log.hpp
index a58e6b0e9..4bd583c2f 100644
--- a/src/lib/test/event-log.hpp
+++ b/src/lib/test/event-log.hpp
@@ -643,6 +643,34 @@ namespace test{
         }
       
       
+      /** */
+      EventLog&
+      clear()
+        {
+          UNIMPLEMENTED ("clear log contents while retaining just the original Header-ID");
+        }
+      
+      /** */
+      EventLog&
+      clear (string alteredLogID)
+        {
+          UNIMPLEMENTED ("clear log contents and reset Header-ID");
+        }
+      
+      EventLog&
+      clear (const char* alteredLogID)
+        {
+          return clear (string{alteredLogID});
+        }
+      
+      template<class X>
+      EventLog&
+      clear (const X *const obj)
+        {
+          UNIMPLEMENTED ("clear log contents and reset Header-ID");
+        }
+      
+      
       
       /* ==== Logging API ==== */
       
diff --git a/tests/library/test/test-event-log-test.cpp b/tests/library/test/test-event-log-test.cpp
index ccfa1ffc1..9b7afd213 100644
--- a/tests/library/test/test-event-log-test.cpp
+++ b/tests/library/test/test-event-log-test.cpp
@@ -67,6 +67,7 @@ namespace test{
           verify_eventLogging();
           verify_genericLogging();
           verify_regExpMatch();
+          verify_logPurging();
         }
       
       
@@ -351,6 +352,25 @@ namespace test{
           // argument match must cover all arguments...
           CHECK (log.ensureNot("spam").argMatch("bacon|^spam"));
         }
+      
+      
+      void
+      verify_logPurging ()
+        {
+          EventLog log("obnoxious");
+          log.create("spam").create("spam").create("spam");
+          CHECK (log.verify("spam").after("obnoxious"));
+          
+          log.clear();
+          CHECK (log.ensureNot("spam"));
+          CHECK (log.verify("obnoxious").type("EventLogHeader").on("obnoxious"));
+          
+          log.warn("eggs");
+          log.clear("unbearable");
+          CHECK (log.ensureNot("eggs"));
+          CHECK (log.ensureNot("obnoxious"));
+          CHECK (log.verify("unbearable").type("EventLogHeader").on(&log));
+        }
     };
   
   LAUNCHER (TestEventLog_test, "unit common");