Self-testing code

Self-testing code is software which incorporates built-in tests (see test-first development).

In Java, to execute a unit test from the command line, a class can have methods like the following.

   // Executing main runs the unit test. 
   public static void main(String[] args) {

       test();
   }
   
   static void test() {
   
       assert foo == bar;
   }

To invoke a full system test, a class can incorporate a method call.

   public static void main(String[] args) {

       test();
       TestSuite.test();    // invokes full system test
   }

See also