EPIC: As a develop I want to implement unit tests

[StijnKing]

Description

One of the tasks in developing software is to add tests. These tests should be run automatically as part of your development workflow (CI). These tests should be a good indicator for you that if passed, shows that existing functionality works as expected.

Focus on: Unit tests for frontend, backend, judge runner, judge queue.

User Stories

• As a developer I want to implement unit tests such that I can automatically tests my code to verify that functionality is still working.
• As a student, I want to fulfil the requirements around testing by the course (code coverage).
• As a developer I want the unit tests to automatically run such that I know when my functionality breaks and I can prevent a PR from merging or code from releasing.

Tasks

• As a developer I want to start with unit tests #84
• STD As a PO I want to have Unit test report Section 9 #83
• As a PO I want the unit tests implemented in the frontend #85
• As a PO I want the unit tests implemented in the backend #86
• As a PO I want the unit tests implemented in the judge queuer repository #87
• As a PO I want the unit tests implemented in the judge runner repository #88
• As a PO I want to have written unit tests for the frontend with good code coverage #194
• As a PO I want to have written unit tests for the backend with good code coverage #195
• As a PO I want to have written unit tests for the judgequeuer repository with good code coverage #196
• As a PO I want to have written unit tests for the judgerunner repository with good code coverage #197
  Additional tasks based on the tests to be created.