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Fixes #828 by updating the nyc configuration.
This builds on the work of @IlyaRucavitcyn's fork. Turns out the issue was the
npm test
command is setting theBABEL_ENV
environment variable tocommonjs
, which doesn't have the required istanbul plugin.To fix this, I just added the commonjs env plugin to the babel test environment and then switched
npm test
to useBABEL_ENV=test
.It now seems to produce an accurate coverage report and
coverage.lcov
is no longer empty after runningnpm run coverage
.