Unit test coverage

[birdofpreyru]

After the last challenge there are some failing tests, also the global test coverage should be increased.

From that submission comments

SubmissionManagement component will fail the snapshot test since we need to dinamically show the user the time left till the current phase ends.

The time for that component comes from a call to Topcoder API. That call should be mocked with standard Jest methods, and then snapshot test will be feasible.

[birdofpreyru]

UPDATE: Will be addressed in this F2F: http://www.topcoder.com/challenge-details/30057203/?type=develop

[birdofpreyru]

UPDATE: Unit test coverage was as high as 83% of branches, 93% of functions, 93% of lines and 93% of statements, but it droped low again after migration of challenge listing code into this repo.

[cwdcwd]

test coverage