Testing.md

@@ -10,7 +10,41 @@ Each test has 4 stages:
 * Check the result, usually via a [`diff`](https://en.wikipedia.org/wiki/Diff) command.
 * Exit with exit code `1` if script is failed or continue with next test.
 
-Example taken from `test_preproc_wg.sh`:
+## Plain template 
+
+Use this template in order to register new tests; replace `NN` and `Description` accordingly:
+
+```bash
+
+```bash
+#BEGIN Test NN: Description
+T=NN
+#echo "##################################################"
+echo "Test $T: Description" 
+#echo "##################################################"
+
+# preparation
+
+
+# run script
+
+
+#check results
+DIFF= 
+#echo "--------------------------------------------------"
+if [ "$DIFF" != "" ] && [ -f "" ]
+then
+    echo "Test $T: failed"
+    exit 1
+else
+    echo "Test $T: passed."
+fi
+#END Test NN
+```
+
+## Concrete Example 
+
+From `test_preproc_wg.sh`:
 
 ```bash
 #BEGIN Test 1: Preprocessor for Working Group