Almost the same question as Debugging jasmine-node tests with node-inspector BUT does anyone know how to use node-inspector with karma?
Install the node-inspector globally from NPM:
npm install -g node-inspector
Then start the node-inspector and background the process (use fg to bring it back to the foreground and kill %1 to stop it):
node-inspector &
And then start your test runner like in debug mode this
node --inspect ./node_modules/karma/bin/karma start
Then connect to the inspector from your local loopback. To start debugging, open the following URL in Chrome: chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:9229/e771f282-5e94-4247-ac1c-89d7dc035129
If all goes well, you’ll see some developer tools from which to begin debugging.
来源:https://stackoverflow.com/questions/29595202/debugging-karma-jasmine-tests-with-node-inspector