frontend test coverage report is not accurate

[samuelallan72]

At the end of running the frontend tests with npm run test, there is a test coverage output table. It looks like this:

----------------------------------|---------|----------|---------|---------|---------------------------------------------------------------------------------
File                              | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
----------------------------------|---------|----------|---------|---------|---------------------------------------------------------------------------------
All files                         |   15.23 |     4.77 |   12.45 |    9.71 |
 src                              |   17.37 |     5.48 |   16.96 |   18.35 |
  lms_index.js                    |   15.42 |     4.71 |   13.28 |   14.56 | 3-19,23-121,133-149,153,229-235,239-257,264-280,284-300,304-320,324-340,344-362
  oa_server.js                    |   12.56 |    19.58 |    9.91 |     100 | 1
  oa_shared.js                    |    22.8 |     5.98 |   26.04 |     100 | 1-18
  studio_index.js                 |    22.7 |     8.31 |   23.87 |     100 | 1-18
 src/lms                          |   14.93 |     4.59 |   11.61 |    6.83 |
  oa_base.js                      |   15.53 |     4.77 |   13.43 |      14 | 3-19,23-121,133-149,153,222-228,232-250,257-273,277-293,297-313,317-333,337-355
  oa_confirmation_alert.js        |   38.98 |    31.14 |   41.37 |     100 | 1
  oa_course_items_listing.js      |   25.59 |     8.02 |    28.4 |     100 | 1-19
  oa_datefactory.js               |   13.12 |     3.99 |    8.38 |    3.54 | 3-121,133-153,164-292
  oa_file_upload.js               |   41.07 |     32.2 |   46.15 |     100 | 1
  oa_grade.js                     |   13.23 |     4.12 |    8.64 |    3.54 | 3-121,133-153,164-292
  oa_leaderboard.js               |   38.98 |    30.64 |   46.15 |     100 | 1
  oa_message.js                   |   41.81 |     32.2 |      50 |     100 | 1
  oa_peer.js                      |   13.41 |     4.28 |    8.93 |    3.54 | 3-121,133-153,164-292
  oa_prompts.js                   |    38.8 |    31.14 |   51.85 |     100 | 1
  oa_response.js                  |   13.29 |     4.38 |    9.03 |    3.54 | 3-121,133-153,164-292
  oa_response_editor.js           |   35.38 |    29.23 |   44.44 |     100 | 1
  oa_rubric.js                    |   25.84 |    24.35 |   31.57 |     100 | 1
  oa_self.js                      |   13.46 |     4.28 |    8.97 |    3.54 | 3-121,133-153,164-292
  oa_staff.js                     |   41.07 |     32.2 |      48 |     100 | 1
  oa_staff_area.js                |   20.15 |    24.72 |   21.31 |     100 | 1
  oa_staff_waiting_step.jsx       |   13.45 |     3.45 |    8.54 |   10.88 | 3-139,143,199-227,234-250,254-270,274-290,294-310,314-332
  oa_training.js                  |   13.42 |     4.27 |    8.92 |    3.54 | 3-121,133-153,164-292
 src/lms/api                      |   17.67 |     9.58 |   17.56 |     100 |
  waiting_step_details.js         |   17.67 |     9.58 |   17.56 |     100 | 1
 src/lms/components               |   13.38 |     3.43 |    8.51 |   10.88 |
  WaitingStepContent.jsx          |    13.5 |     3.46 |    8.58 |   10.88 | 3-139,143,199-227,234-250,254-270,274-290,294-310,314-332
  WaitingStepList.jsx             |   13.26 |     3.41 |    8.43 |   10.88 | 3-139,143,199-227,234-250,254-270,274-290,294-310,314-332
 src/lms/containers               |   13.42 |     3.45 |    8.52 |   10.88 |
  WaitingStepDetailsContainer.jsx |   13.42 |     3.45 |    8.52 |   10.88 | 3-139,143,199-227,234-250,254-270,274-290,294-310,314-332
 src/lms/editors                  |   53.44 |    28.57 |   67.85 |     100 |
  oa_editor_textarea.js           |   53.44 |    28.57 |   67.85 |     100 | 1
 src/studio                       |   23.73 |    22.81 |   22.42 |     100 |
  oa_container.js                 |   29.48 |    28.35 |   36.36 |     100 | 1
  oa_container_item.js            |   21.42 |    20.17 |   20.55 |     100 | 1
  oa_edit.js                      |   22.36 |    22.47 |    19.2 |     100 | 1
  oa_edit_assessment.js           |   24.37 |    24.25 |   22.32 |     100 | 1
  oa_edit_assessments_steps.js    |   29.48 |    26.76 |   32.43 |     100 | 1
  oa_edit_fields.js               |    25.8 |    18.62 |      25 |     100 | 1
  oa_edit_listeners.js            |   22.19 |    22.75 |   21.63 |     100 | 1
  oa_edit_notifier.js             |   43.39 |    31.14 |   54.54 |     100 | 1
  oa_edit_prompts.js              |   23.71 |    22.26 |   21.89 |     100 | 1
  oa_edit_rubric.js               |   21.86 |     23.6 |   20.31 |     100 | 1
  oa_edit_schedule.js             |   28.83 |    21.84 |    29.8 |     100 | 1
  oa_edit_settings.js             |   23.12 |    21.16 |   22.55 |     100 | 1
  oa_edit_validation_alert.js     |    31.5 |    31.14 |    37.5 |     100 | 1
  oa_tiny_mce.js                  |      30 |    20.68 |   35.29 |     100 | 1
----------------------------------|---------|----------|---------|---------|---------------------------------------------------------------------------------

Unfortunately, it doesn't appear to be working - notice how several files have identical "% Lines" and "Uncovered Line #s" columns.

This would be helpful to be fixed, as coverage is a useful tool.