This repeats the pattern we already have for previewing a letter,
where we assume the error is because the notification has already
been sent and redirect the user to see it.
I've improved the original pattern a bit:
- I've DRYed-up the low-level boto code and moved the error handler
there so it can be reused.
- I've introduced a custom exception, which the calling code can
choose to log.
- I've introduced the moto library, which we use elsewhere, to make
it easier to test S3 code.
I've used an error level log when sending a notification - now that
we have a more descriptive log, we can verify the assumption is true
and then make an informed decision to downgrade the log.
In future we may want to merge this handler with the similar code
in utils [1], but we'll need to be careful as the utils handler is
superficial - it doesn't check the reason for the error.
[1]: bce0f4e596/notifications_utils/s3.py (L52)
We have a `client_request` fixture which does a bunch of useful stuff
like:
- checking the status code of the response
- returning a `BeautifulSoup` object
Lots of our tests still use an older fixture called `logged_in_client`.
This is not as good because:
- it returns a raw `Response` object
- doesn’t do the additional checks
- means our tests contain a lot of repetetive boilerplate like `page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')`
This commit converts all the tests using `logged_in_client` to:
use `client_request` instead.
This continues the work from Template Preview [1], so that we have
a complete store of original PDFs to use for testing changes to it.
Previously we did store some originals, but these were only invalid
PDFs that had failed sanitisation; for valid PDFs, the "transient"
bucket only contains the sanitised versions, which the API deletes
/ moves when the notification is sent [2].
Since the notification is only created at a later stage [3], there's
no easy way to get the final name of the PDF we send to DVLA. Instead,
we use the "upload_id", which eventually becomes the notification ID
[4]. This should be enough to trace the file for specific debugging.
Note that we only want to store original PDFs if they're valid (and
virus free!), since there's no point testing changes with bad data.
[1]: https://github.com/alphagov/notifications-template-preview/pull/545
[2]: c44ec57c17/app/service/send_notification.py (L212)
[3]: 7930a53a58/app/main/views/uploads.py (L362)
[4]: 7930a53a58/app/main/views/uploads.py (L373)
We have lots of functions for converting various types of data into
strings to be displayed to the user somewhere.
This commit collects all these functions into their own module, rather
than having them cluttering up `app/__init__.py` or buried amongst
various other things that have ended up in `app/utils.py`.
the upload preview page has a file_id - this corresponds to the file in
the transient pdf uploads bucket. However, if the user already hit send
(and then navigated back) the file's no longer in that bcuket, it's been
moved to the regular letters-pdf bucket. So the s3 get request fails. To
avoid this, simply redirect to the notifications page if the file isn't
in the transient bucket. This is better for the user as it'll stop them
trying to submit it twice, and will provide more clarity on the status
of the notification too.
