Support BBC Reel URIs

[dirkf]

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• Searched the bugtracker for similar pull requests
• Read adding new extractor tutorial
• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
• Checked the code with flake8

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What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

Extracted from PR #23415.

Fixes Issue #21870 (etc).

Test URL: https://www.bbc.com/reel/video/p07c6sb6/how-positive-thinking-is-harming-your-happiness

[remitamine]

Add a test.

[dirkf]

Here's a version with a test that succeeds and returns with metadata after parsing the JSON.

However this seems much simpler, although it finds no description:

        if not programme_id:
            programme_id = self._search_regex(
                r'/reel/video/(?P<id>%s)/' % self._ID_REGEX, url, 'Reel pid', default=None)
            if programme_id:
                return self.url_result(
                            'https://www.bbc.co.uk/programmes/%s' % programme_id,
                            ie=BBCCoUkIE.ie_key())

[dirkf]

Thanks for the guidance and topping and tailing the result. I did have the feeling that you knew how to implement it yourself and actually that might have been easier.

PRs ought to come with tests but I couldn't see any spec of how to populate the _TESTS list. Extractor mods are more likely to come with tests if it's obvious how to do it -- maybe put it in the template?

[remitamine]

PRs ought to come with tests but I couldn't see any spec of how to populate the _TESTS list. Extractor mods are more likely to come with tests if it's obvious how to do it -- maybe put it in the template?

_TESTS is simply an array of test cases that has the same spec as _TEST dict that has an exmple in step 4 of Adding support for a new site section.