eth2.0-specs/test_libs/pyspec/README.md

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# ETH 2.0 PySpec
The Python executable spec is built from the ETH 2.0 specification,
complemented with the necessary helper functions for hashing, BLS, and more.
With this executable spec,
test-generators can easily create test-vectors for client implementations,
and the spec itself can be verified to be consistent and coherent, through sanity tests implemented with pytest.
## Building
All the dynamic parts of the spec can be build at once with `make pyspec`.
Alternatively, you can build a sub-set of the pyspec: `make phase0`.
Or, to build a single file, specify the path, e.g. `make test_libs/pyspec/eth2spec/phase0/spec.py`
## Py-tests
After building, you can install the dependencies for running the `pyspec` tests with `make install_test`
These tests are not intended for client-consumption.
These tests are sanity tests, to verify if the spec itself is consistent.
### How to run tests
#### Automated
Run `make test` from the root of the spec repository.
#### Manual
From within the `pyspec` folder:
Install dependencies:
```bash
python3 -m venv venv
. venv/bin/activate
pip3 install -r requirements-testing.txt
```
Note: make sure to run `make -B pyspec` from the root of the specs repository,
to build the parts of the pyspec module derived from the markdown specs.
The `-B` flag may be helpful to force-overwrite the `pyspec` output after you made a change to the markdown source files.
Run the tests:
```
pytest --config=minimal
```
## Contributing
Contributions are welcome, but consider implementing your idea as part of the spec itself first.
The pyspec is not a replacement.
## License
Same as the spec itself, see [LICENSE](../../LICENSE) file in spec repository root.