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`DEVELOPER=1` assumes that the binary has been compiled with developer set to true, which might not be the case for plugin developers. Setting this to 0 by default has no effect in c-lightning since we always at least set it in `config.vars` but may prevent some issues outside.
pyln-testing: A library to write tests against c-lightning
This library implements a number of utilities that help building tests for c-lightning nodes. In particular it provides a number of pytest fixtures that allow the management of a test network of a given topology and then execute a test scenarion.
pyln-testing is used by c-lightning for its internal tests, and by the
community plugin directory to exercise the plugins.
Installation
pyln-testing is available on pip:
pip install pyln-testing
Alternatively you can also install the development version to get access to currently unreleased features by checking out the c-lightning source code and installing into your python3 environment:
git clone https://github.com/ElementsProject/lightning.git
cd lightning/contrib/pyln-testing
python3 setup.py develop
This will add links to the library into your environment so changing the checked out source code will also result in the environment picking up these changes. Notice however that unreleased versions may change API without warning, so test thoroughly with the released version.