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Merge coverage files with istanbul

I have a situation where all my tests run in parallel and it creates the coverage report.

I was able to create a separate coverage folder for each test with the --dir option in the command line, which is great.

Now that I have all of these folders with coverage details, is it possible to merge all of these files into one?

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Answer

I’ve discovered that istanbul report does the merging of the files by default, which is what I was after.

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