```
test('should update start of week when week starts on monday', function() {
  /**
   * 1. Manipulate DOM so that week is displayed to start on Sunday
   * 2. Set fake l10n value
   * 3. Dispatch 'localized'
   * 4. Make sure DOM is updated so week is displayed to start on Monday
   */
});

test('should update start of week when week starts on sunday', function() {
  /* Inverse of above */
});
```