return code 1 when not all tests pass

mUnittest.m

@@ -20,14 +20,18 @@ function ret = mUnittest(script)
         end
         
         % print summary
-        summary();
+        if (summary())
+            ret = 0;
+        else
+            ret = 1;
+        end
     else
         ret = 1;        
     end%if
 
 end%function mUnittest
 
-function summary()
+function ret = summary()
 
     % get number of passed and failed tests
     result = assert();    
@@ -48,6 +52,8 @@ function summary()
     fid = fopen(sprintf('%sReport.xml', className()), 'w');
         fprintf(fid, '<testsuite tests="%d" time="%.f">%s\n</testsuite>',num, t, xml);    
     fclose(fid);
+
+    ret = f == 0;
     
 end