Follow these instructions to run the demo:
Step 1. Create and activate a virtual environment.
virtualenv env (or virtualenv env --always-copy for Windows users)
source bin/env/activate
Step 2. Install the requirements.
pip3 install -r requirements.txt
Step 3. Install Chrome and ChromeDriver.
Step 4. In one terminal, start the server.
python3 server.py
Step 5. In another terminal, run the tests.
python3 tests-simple.py or python3 tests.py