nodejs - How to check which portion of code is tested with unit tests?

Question

I am using tape and istanbul to write unit tests in my Node.js project and the result is the following:

Statements   : 93.04% ( 107/115 )
Branches     : 86.84% ( 33/38 )
Functions    : 90% ( 27/30 )
Lines        : 93.86% ( 107/114 )

Is there a way to find out which statements, functions or portion of the code is left untested?

Answer 1

According to the doc you should find a complete html report under ./coverage with line by line coverage :

and this should produce a coverage.json, lcov.info and lcov-report/*html under ./coverage Sample of code coverage reports produced by this tool (for this tool!): HTML reports

Doc : https://github.com/gotwarlost/istanbul#getting-started