--- /dev/null
+
+Test coverage
+=================
+
+It is considered good practice to develop and maintain the test suite with high level
+of test coverage, i.e. the tests that execute every single statement, every line of the code and
+then validate the result.
+
+The GNU's *gcov* is a tool that analyses the frequency of execution of each line of the code.
+For more details see GNU documentation http://gcc.gnu.org/onlinedocs/gcc/Gcov.html
+
+To invoke *gcov* on *krb5* tree, do *configure* with the following options and run the tests::
+
+ ./configure CFLAGS="-fprofile-arcs -ftest-coverage -O0" LIBS=-lgcov
+ make
+ make check
+
+It will result into creation of the new helper files with the extentions *gcno* and *gcda*.
+
+To validate the test coverage of the specific file, change the directory to
+its location and run ::
+
+ gcov -o filename.so.gcno filename.c
+
+To see the test coverage of the *filename.c* open a newly created file *filename.c.gcov* in the editor.
+
+Some recent test coverage result can be found at the http://k5wiki.kerberos.org/wiki/Test_coverage
+
+
+
+
+
+