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core-lightning/contrib/pyln-testing
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Rusty Russell e8d2176e6b pytest: protect against bad gossip messages from mining confirms too fast. 
If we fund a channel between two nodes, then mine all the blocks to
announce it, any other nodes may see the announcement before the
blocks, causing CI to complain about "bad gossip":

```
lightningd-4: 2022-01-25T22:33:25.468Z DEBUG   032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e-gossipd: Ignoring future channel_announcment for 113x1x1 (current block 112)
lightningd-4: 2022-01-25T22:33:25.468Z DEBUG   032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e-gossipd: Bad gossip order: WIRE_CHANNEL_UPDATE before announcement 113x1x1/0
lightningd-4: 2022-01-25T22:33:25.468Z DEBUG   032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e-gossipd: Bad gossip order: WIRE_CHANNEL_UPDATE before announcement 113x1x1/1
lightningd-4: 2022-01-25T22:33:25.468Z DEBUG   032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e-gossipd: Bad gossip order: WIRE_NODE_ANNOUNCEMENT before announcement 032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e
```

Add a new helper for this case, and use it where there are more than 2 nodes.

Cleans up test_routing_gossip and a few other places which did this manually.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2022-02-08 11:15:52 +10:30
..
pyln/testing pytest: protect against bad gossip messages from mining confirms too fast. 2022-02-08 11:15:52 +10:30
tests pyln-testing: Add a dummy test to check functionality 2020-08-30 20:03:42 +02:00
Makefile Skip following import and skip flask type to mypy code analysis. 2021-08-30 12:12:32 +09:30
README.md pyln-testing: Copy basic support infrastructure into pyln.testing 2019-11-12 21:23:55 +01:00
requirements.txt pytest: add schema support for JSON responses. 2021-05-27 20:28:49 +09:30
setup.py pyln: Derive version from git for pyln-testing 2021-09-28 18:34:43 +02:00

README.md

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.