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Do you need mocha to use istanbul with mocha?


Asked by Gabriel Coffey on Dec 08, 2021 FAQ



Istanbul is extensively tested with mocha, which we use for many of our own repos. At the end of the day, all you need to do is place the… Istanbul is extensively tested with mocha, which we use for many of our own repos. At the end of the day, all you need to do is place the… Using Istanbul With Mocha istanbul
Just so,
Istanbul is a test coverage tool that works with many different frameworks. It tracks which parts of your code are executed by your unit tests. Thus, you can use Istanbul to view and see coverage gaps, or you can integrate it integrated into your CI pipeline to enforce coverage levels. Ultimately, Istanbul enables data-driven testing.
Besides, So there are two issues with the command you are running: The -u exports and -R spec are considered to be istanbul flags rather than mocha flags and are silently ignored. At this point, mocha will at least honor the options but it still won't provide coverage.
Also,
Mocha accepts a --compilers parameter so we can tell it to use Babel to transpile the code before running the tests: Let’s try running it again: Great! This time the tests worked. However, it’s not time to celebrate yet. We also need to add code coverage generation. Code coverage is metric used to see how well your code is tested.
Keeping this in consideration,
With its default “BDD”-style interface, Mocha provides the hooks before (), after (), beforeEach (), and afterEach (). These should be used to set up preconditions and clean up after your tests. Tests can appear before, after, or interspersed with your hooks.