Created and test endorsement API with no authorization

[evelynnchen-cmu]

Resolves #34

Created API endpoints for endorsing and unendorsing, allowing any logged in user to flip the endorsed boolean field on a post. I took inspiration from bookmark's API.

Edited the following files:

• src/api/posts.js: connecting the existing postsAPI to the endorse function
• src/posts/endorsements.js: Changes the database with the new value for endorsed
• src/posts/index.js: Added in require to route properly
• src/socket.io/posts/tools.js: Added in here because was not passing other existing test cases.
• test/posts.js: Developed unit tests to endorse and unendorse a test post.

The current implementation does not check the requesting user's group as that is #26 and I also want to develop incrementally and push out changes to team members to allow for parallel development.

[coveralls]

Pull Request Test Coverage Report for Build 11221437443

Details

• 27 of 37 (72.97%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.03%) to 82.657%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/posts/endorsements.js	21	25	84.0%
src/socket.io/posts/tools.js	3	9	33.33%

Totals
Change from base Build 11209356722:	-0.03%
Covered Lines:	22369
Relevant Lines:	25635

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💛 - Coveralls

[AliceeLe]

Everything seems to work. The amount of commit is easy to follow through and the field appears on the JSON file.