Testing and benchmarking

Testing

Install the following dependencies into the default Python installation:

pip install pytest selenium pytest-instafail pytest-httpserver

Install geckodriver and chromedriver and check that they are in your PATH.

To run the pytest suite of tests, type on the command line:

pytest src/ pyodide_build/ packages/*/test_*

There are 3 test locations,

src/tests/: general pyodide tests and tests running the CPython test suite
pyodide_build/tests/: tests related to pyodide build system (do not require selenium to run)
packages/*/test_*: package specific tests.

To run manual interactive tests, a docker environment and a webserver will be used.

Bind port 8000 for testing. To automatically bind port 8000 of the docker environment and the host system, run: ./run_docker
Now, this can be used to test the pyodide builds running within the docker environment using external browser programs on the host system. To do this, run: ./bin/pyodide serve
This serves the build directory of the pyodide project on port 8000.
- To serve a different directory, use the --build_dir argument followed by the path of the directory.
- To serve on a different port, use the --port argument followed by the desired port number. Make sure that the port passed in --port argument is same as the one defined as DOCKER_PORT in the run_docker script.
Once the webserver is running, simple interactive testing can be run by visiting this URL: http://localhost:8000/console.html

To run common benchmarks to understand Pyodide's performance, begin by installing the same prerequisites as for testing. Then run:

make benchmark

Python is linted with flake8. C and Javascript are linted with clang-format.

To lint the code, run:

make lint