Extreme Programming Installed

Testing Interconnection

Somehow we must associate a Searcher with our GUI, and verify that we display its results.

We'll give our panel two methods, getSearcher() and setSearcher(),that will associate a Searcher with the panel. This decision lets us write another test:

public void testSearcherSetup() {
    Searcher s = new Searcher() {
      public Result search(Query q) {return null;} 
    };
    SearchPanel panel = new SearchPanel();
    assert ("Searcher not set", panel.getSearcher() != s);
    panel.setSearcher(s);
    assert("Searcher now set", panel.getSearcher() == s);
  }

The compile fails, so bounce over to the SearchPanel, add the methods, run the tests again, and they fail. Implement the set/get methods, and the test passes.

The panel still can't do much, but now ...