New to test coverage and confused about how NYC determines what code is covered

[tylers-username]

Link to bug demonstration repository

https://github.com/tylerssn/debug-nyc

Expected Behavior

I expect to know when code will be covered;

I expect my InvalidIndexError class to be 100% covered by currently implemented tests.

Observed Behavior

Lines 5-6 of `InvalidIndexError.ts` is not covered by my test.

ERROR: Coverage for lines (26.56%) does not meet global threshold (90%)
----------------------|---------|----------|---------|---------|-------------------
File                  | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------------------|---------|----------|---------|---------|-------------------
All files             |   24.64 |    35.29 |    37.5 |   26.56 |                   
 Index.ts             |       0 |        0 |       0 |       0 | 1-82              
 InvalidIndexError.ts |   80.95 |    46.15 |      75 |   89.47 | 5-6               
----------------------|---------|----------|---------|---------|-------------------

Troubleshooting steps

• still occurring when I put cache: false in my nyc config
• removed all other project files unrelated to the test
• reviewed documentation

Environment Information

npx: installed 1 in 1.61s

  System:
    OS: macOS 10.15.6
    CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
    Memory: 1.59 GB / 16.00 GB
  Binaries:
    Node: 14.6.0 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.7 - /usr/local/bin/npm
  npmPackages:
    nyc: ^15.1.0 => 15.1.0 
    source-map-support: ^0.5.19 => 0.5.19 
    ts-node: ^8.10.2 => 8.10.2 
    typescript: ^3.9.7 => 3.9.7 

[tylers-username]

Updated issue with link to repository.

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.