1 files changed, 16 insertions, 0 deletions

diff --git a/src/unit/membuf.cpp b/src/unit/membuf.cpp
index 3aebc4d..dc02aa3 100644
--- a/src/unit/membuf.cpp
+++ b/src/unit/membuf.cpp
@@ -15,6 +15,7 @@ public:
         {
                 setName("MemBuf");
                 addTest( Unit::testWriteRead01 );
+                addTest( Unit::testOverwrite1 );
         }
 
         virtual ~Unit()
@@ -39,6 +40,21 @@ public:
                 unitTest( mb.read( buf, 7 ) == 3 );
                 unitTest( !strncmp( buf, "eFG", 3 ) );
         }
+
+        void testOverwrite1()
+        {
+                Bu::MemBuf mb;
+                unitTest( mb.write("0123456789") == 10 );
+                mb.setPos( 4 );
+                unitTest( mb.write("-5-") == 3 );
+                mb.setPos( 9 );
+                mb.write("Hey!!!");
+                unitTest( mb.tell() == 15 );
+                char buf[50];
+                mb.setPos( 0 );
+                buf[mb.read( buf, 50 )] = '\0';
+                unitTest( !strcmp( buf, "0123-5-78Hey!!!" ) );
+        }
 };
 
 int main( int argc, char *argv[] ){ return Unit().run( argc, argv ); }