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Running the Tests

In order to run the tests, you first need to have built the JavaScript dash_core_components library. You will need to build the library again if you've pulled from upstream otherwise you may be running with an out of date bundle.js. See the instructions for building bundle.js in the "Testing Locally" section of README.md.

You also need to set the environment variable TOX_PYTHON_27 and with the location of the Python 2 installations you want tox to use for creating the virtualenv that will be used to run the tests. Note that this means you do not need to install any dependencies into the installation yourself.

If you're using pyenv to manage Python installations, you would do something like this:

export TOX_PYTHON_27=~/.pyenv/versions/2.7.14/bin/python

Local configuration

You can configure the test server with the following variables:

DASH_TEST_CHROMEPATH

If you run a special chrome set the path to your chrome binary with this environment variable.

DASH_TEST_PROCESSES

If you encounter errors about Multi-server + Multi-processing when running under Python 3 try running the tests with the number of server processes set to 1.

Example: single test run with configuration

DASH_TEST_CHROMEPATH=/bin/google-chrome-beta DASH_TEST_PROCESSES=1 python -m unittest -v test.test_integration.Tests.test_inputs