Fill in missing steps in CONTRIBUTING.md

Author: dannysepler

CONTRIBUTING.md

@@ -16,10 +16,13 @@ $ pip install -e .[testing,dev]  # in some shells you need \ to escape []
 $ cd dash-renderer
 # build renderer bundles, this will build all bundles from source code
 # the only true source of npm version is defined in package.json
+$ npm install
 $ npm run build  # or `renderer build`
 # install dash-renderer for development
 $ pip install -e .
 # build and install components used in tests
+$ cd .. # should be back in dash/ root directory
+$ npm install
 $ npm run setup-tests
 # you should see both dash and dash-renderer are pointed to local source repos
 $ pip list | grep dash
@@ -104,7 +107,7 @@ Note that we also start using [`black`](https://black.readthedocs.io/en/stable/)
 
 ## Tests
 
-We started migrating to [pytest](https://docs.pytest.org/en/latest/) from `unittest` as our test automation framework. You will see more testing enhancements in the near future.
+We started migrating to [pytest](https://docs.pytest.org/en/latest/) from `unittest` as our test automation framework. You will see more testing enhancements in the near future. To run the tests, see the commands in the `package.json` (such as `npm run test.integration`)
 
 ### Unit Tests
 
@@ -116,6 +119,8 @@ Note: *You might find out that we have more integration tests than unit tests in
 
 We introduced the `dash.testing` feature in [Dash 1.0](https://community.plotly.com/t/announcing-dash-testing/24868). It makes writing a Dash integration test much easier. Please read the [tutorial](http://dash.plotly.com/testing) and add relevant integration tests with any new features or bug fixes.
 
+To run the integration tests, you may have to [install circleci](https://circleci.com/docs/2.0/local-cli/).
+
 ## Financial Contributions
 
 Dash, and many of Plotly's open source products, have been funded through direct sponsorship by companies. [Get in touch] about funding feature additions, consulting, or custom app development.

package.json

@@ -12,7 +12,7 @@
     "private::lint.renderer": "cd dash-renderer && npm run lint",
     "private::test.setup-nested": "cd \\@plotly/dash-generator-test-component-nested && npm ci && npm run build && pip install -e .",
     "private::test.setup-standard": "cd \\@plotly/dash-generator-test-component-standard && npm ci && npm run build && pip install -e .",
-    "private::test.unit-dash": "PYTHONPATH=~/dash/tests/assets pytest tests/unit",
+    "private::test.unit-dash": "PYTHONPATH=tests/assets pytest tests/unit",
     "private::test.unit-renderer": "cd dash-renderer && npm run test",
     "private::test.integration-dash": "TESTFILES=$(circleci tests glob \"tests/integration/**/test_*.py\" | circleci tests split --split-by=timings) && pytest --headless --nopercyfinalize --junitxml=test-reports/junit_intg.xml ${TESTFILES}",
     "format": "run-s private::format.*",