Better error message when calling readIterations() too late

Author: franzpoeschel

src/ReadIterations.cpp

@@ -39,6 +39,13 @@ SeriesIterator::SeriesIterator( Series series )
         *this = end();
         return;
     }
+    else if(
+        it->second.get().m_closed == internal::CloseStatus::ClosedInBackend )
+    {
+        throw error::WrongAPIUsage(
+            "Trying to call Series::readIterations() on a (partially) read "
+            "Series." );
+    }
     else
     {
         auto openIteration = []( Iteration & iteration )

test/SerialIOTest.cpp

@@ -5086,8 +5086,8 @@ void append_mode(
             }
             REQUIRE( counter == 5 );
             // Cannot do listSeries here because the Series is already drained
-            // @todo better error message if attempting this
-            // helper::listSeries( read );
+            REQUIRE_THROWS_AS(
+                helper::listSeries( read ), error::WrongAPIUsage );
         }
         else
         {