- "HelloWorldTest.java" is a JUnit test that extends ConcordionTestCase;
- "HelloWorld.html" is the Concordion specification and is processed by the "HelloWorldTest.java" test;
- The name of the test and the HTML share the same base name;
- In order to tell ConcordionRunner where to leave the html files after executing the tests, we set the systemProperty "concordion.output.dir".