#123: add tests for different enum representations

[cpud36]

This pull request is addressing issue #123.

Currently it only adds tests mentioned in the issue.
I'm not sure where to put the documentation, so would appreciate some guiding.

If anything needs to be changed, please say it. This is my first PR.

[torkleyy]

This is great, thank you!
Congrats on your first PR ;)

Now we just need to make Travis happy, let me check why it failed.

[torkleyy]

Multiple tests seem to fail:

https://travis-ci.org/ron-rs/ron/jobs/537411188#L596

[cpud36]

(
    type: "VariantA",
    content: (),
)

For such input serde tried to deserialize type field with deserialize_str, and it tried to deserialize value of the type field with deserialize_identifier.
As was expected, both of them failed.

To fix it the following was done:

• IdDeserializer::deserialize_str was redirected to IdDeserializer::deserialize_identifier
• In CommaSeparated value is parsed with TagDeserializer wrapper
• TagDeserializer redirects everything to inner type, except for deserialize_identifier, which it redirects to deserializer_str.

I am not sure, if this have broken something, but tests seem to pass.

[cpud36]

@torkleyy, is there anything that needs to be done?

[torkleyy]

Thank you!
bors r+

[bors]

Build succeeded

• continuous-integration/travis-ci/push