Handy default configuration for instrumenting your TypeScript-backed project with test coverage using nyc.
First install the dependencies:
npm i -D nyc source-map-support ts-node @istanbuljs/nyc-config-typescript
tsconfig.json must be configured to produce source maps, either inline or as sibling files.
And write a
.nycrc that looks like this:
"extends": "@istanbuljs/nyc-config-typescript"// OPTIONAL if you want coverage reported on every file, including those that aren't tested:"all": true
This package specifies the
extension options for you - only override those if you absolutely must.
If you're using
--require ts-node/register #replace with ts-node/register/transpile-only if you have custom types --require source-map-support/register --recursive <glob for your test files>
Now setup the test scripts in your package.json like so (with the equivalent for your test runner):