updated docs

test/readme.md

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+# Tests
+
+To run all the tests use `npm test`. This will run the tests and produce a code coverage report at [coverage/index.html](../coverage/index.html). The full test suite is run as a hook on each `git push`. [Mocha](https://mochajs.org) is our preferred test runner.
+
+## Frontend
+
+Unit tests reside in `test/frontend/tests`.
+
+Frontend tests can be ran in the browser by running `npm start` and then browsing to http://localhost:8080/test. Doing it this way will watch for changes and rerun the suite automatically.
+
+You can also run them in headless Chrome by using `npm run test:frontend`. The results will be printed to the console.
+
+## Backend
+
+Unit tests reside in `test/backend`
+
+Backend test can be run with `npm run test:backend`. [Sinon](http://sinonjs.org/) and [proxyquire](https://github.com/thlorenz/proxyquire) are used for mocking.

test/test_upload.txt

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-This is a test.