Cypress with Istanbul is not generating code coverage reports

Question

I have VueJS app and Cypress for testing. I need to have code coverage info.

Running tests in Cypress is generating seemingly correct .nyc_output/out.json file with numbers how many times some lines were executed.

How to generate correct report?

Problem is that npx nyc report says that everything is 0%

tree .nyc_output/

Sample from the out.json where numbers are different from zero

Shend

Did you follow the code coverage guide? docs.cypress.io/guides/tooling/code-coverage.html – Fedora

Coverage guide is followed and it all works except the report is not generated. – Shend

Any updates? I am facing the same issue. Getting out.json as an empty object. – Knute

One guy in our team is able to generate reports on one machine. Did not find any correlation or reason why it does not work otherwise. – Shend

Answer 1

For me, downgrading nyc version solved it

npx [email protected] report

Rrhoea