Try this for a test: stub out `panel.picker.value` with a non-zero value, and assert that `panel.alarm` has the correct duration [after a simulated click event](https://github.com/Protonk/gaia/blob/dcef32de9bbefb403dec60685a7272cc1e34a286/apps/clock/test/unit/timer_panel_test.js#L177-L181). It's going to be ugly, so also reference [Bug 907177](https://bugzilla.mozilla.org/show_bug.cgi?id=907177), as in:

```js
// TODO: Remove this test when the integration test suite is completed
// Bug 907177 - [Clock] Add integration tests
// https://bugzilla.mozilla.org/show_bug.cgi?id=907177
```