The way okaara works, by the time this method is invoked, the association flag would have been translated to True, not 'true'.

To get that in the test, you can add the command and invoke it as if you were the user:

```
self.cli.add_command(search_command)
self.cli.run('search --associations --repo-id a_repo'.split())
```

That'll run the search_isos command through the framework, invoking the parsers attached to the options (if any) and the flag translation to True.