Fix crash for unknown resource, add Podcast & Episode resources

[hithomasmorelli]

Fixes #132

Have so far created an empty Podcast class and linked it into Client.
Am planning to also take the opportunity to integrate some Podcast API functionality, and add a failsafe to _process_json to prevent a new "type" from causing a crash in the future (by just instantiating a Resource)

• Include tests for bug fix and new functionality*
• Updated documentation for new feature (docstrings)

(*a test for the failsafe would be a test that the program doesn't crash upon finding an unknown "type" field - not sure on the best way to implement this)

[hithomasmorelli]

Not sure how to achieve 100% coverage on this - how would we test for an unexpected resource?(!)

[browniebroke]

We could write a test specificly for the Client._process_json or Client.get_object method in here:

https://github.com/browniebroke/deezer-python/blob/master/tests/test_client.py

If we write a test for _process_json, we don't need to mock anything, but we're testing a bit implementation detail.

If we do it at the get_object level, we would need to record a cassette from a simple real resource and edit it to use a replace the resource name by something that doesn't exist.

[hithomasmorelli]

I think Client._process_json would be better, as that way a cassette couldn't be accidentally overwritten.

[sourcery-ai]

Sourcery Code Quality Report (beta)

Merging this PR leaves code quality unchanged.

Quality metrics	Before	After	Change
Complexity	0.33	0.33	0.00
Method Length	27.24	27.47	0.23 🔴
Quality	9.30	9.30	0.00

Other metrics	Before	After	Change
Lines	1035	1140	105

Changed files	Quality Before	Quality After	Quality Change
deezer/client.py	9.08	9.11	0.03 🔵
deezer/resources.py	9.59	9.60	0.01 🔵
tests/test_client.py	9.33	9.30	-0.03 🔴
tests/test_resources.py	8.94	8.93	-0.01 🔴

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Overall	Recommendation
tests/test_client.py	TestClient.test_process_json_types	0	139.43	6.99	Split out functionality

Please see our documentation here for details on how these metrics are calculated.

We are actively working on this report - lots more documentation and extra metrics to come!

Let us know what you think of it by mentioning @sourcery-ai in a comment.

[browniebroke]

Thanks for the great work! 🎉

[browniebroke]

@all-contributors please add @hithomasmorelli for bug, code, ideas

[allcontributors]

@browniebroke

I've put up a pull request to add @hithomasmorelli! 🎉