Increase Code Coverage for All Functions

[Lancasterwu]

Description of Pull Request

This PR is provided by @GatorEducator/team-lancaster and @GatorEducator/team-spencer to increase the code coverage from 64.15% to 99.17% with the following features:

• Increasing code coverage for display.py from 82% to 100%.
  • Provide test_display_welcome_message and restructure display_welcome_message to make it can be easier tested. @Lancasterwu
• Increasing code coverage for grouprandom.py from 60% to 100%.
  • Provide test functions to test group_random_num_group. @wattob
• Increasing code coverage for grouprrobin.py from 56% to 100%.
  • Provide test functions to test group_rrobin_num_group @ALEXANDERB82 & @everitt-andrew
• increasing code coverage for readstudentfile.py from 28% to 100%.
  • Provide test_read_file_populates_csvdata_0 to test read_student_file and add students.csv as an input to test. @thomad74
• Increasing code coverage for parseargument.py from 77% to 98%.
  • Provide a new file test_num_group.py with test functions to test check_valid_num_group. @reibelj
• Increasing code coverage for gatorgrouper.py from 40% to 100%.
  • Provide pragma to not report test coverage for if __name__ == "__main__" @baldeosinghm & @yeej2

NOTE:

• There are two quit() functions was not able to be tested in parseargument.py, which caused that 2% of coverage missing.
• Random test input generator Hypothesis still need to be implemented. @mmarconi and @libailong are currently working on that.
• This PR should only be merged in after PR https://github.com/GatorEducator/gatorgrouper/pull/180 is merged. In order to run the correct linting tool with the right path, some changes are same to that PR.

This PR Fixes #137

Type of Change

Please describe the pull request as one of the following:

• [ ] Bug fix
• [ ] Breaking change
• [ ] New feature
• [ ] Documentation update
• [X] Improving Test Coverage

Tags

@Lancasterwu @huangs1 @gkapfham @aubreypc @Michionlion

[Lancasterwu]

Hi @Michionlion, I think this PR is ready to be merged.