Some test fail due to missing 'id' and 'ext' in test case specification

[ghost]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like this: [x])
• Use the Preview tab to see what your issue will actually look like

---

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.11.15. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.11.15

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

---

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

Some testl cases in the extractors do not supply an 'id' or 'ext' yielding errors like

======================================================================
ERROR: test_ORFTVthek_2 (test.test_download.TestDownload):
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".../youtube-dl-2017.11.15/youtube-dl/test/test_download.py", line 110, in test_template
    raise Exception('Test definition incorrect. The output file cannot be known. Are both \'id\' and \'ext\' keys present?')
Exception: Test definition incorrect. The output file cannot be known. Are both 'id' and 'ext' keys present?

(Note that test_ORFTVthek_2 is an automatically generated function).
The reason for this error is that the some test cases in youtube_dl/extractors/orf.py do not have a 'id' or 'ext' entry. It seems that this is not a problem with the test as it has the 'skip_download': True entry, but more a shortcoming of the generic implementation which enforces the existence of 'id' and 'ext' and errors out otherwise.

Other tests with the same deficiency:

• test_ORFTVthek_2 (test.test_download.TestDownload) defined in file youtube_dl/extractors/orf.py
• test_ORFTVthek_3 (test.test_download.TestDownload) defined in file youtube_dl/extractors/orf.py
• test_Rozhlas_1 (test.test_download.TestDownload) defined in file youtube_dl/extractors/rozhlas.py
• test_Vidzi_1 (test.test_download.TestDownload) defined in file youtube_dl/extractors/vidzi.py
• test_Vidzi_2 (test.test_download.TestDownload) defined in file youtube_dl/extractors/vidzi.py
• test_YoukuShow_2 (test.test_download.TestDownload) defined in file youtube_dl/extractors/youku.py