README for cardano-node-tests

System and end-to-end (E2E) tests for cardano-node.

Check this documentation for more details.

Running tests using Github Actions

The easiest way to run the tests is by using Github Actions.

fork this repository
enable Github Actions in your fork (“Settings” / “Actions” / “General” / “Actions permissions”, check “Allow all actions and reusable workflows”)
go to “Actions”, select “01 Regression tests” (or “02 Regression tests with db-sync”)
select “Run workflow”

Running tests using Nix

install and configure nix, follow cardano-node documentation
clone this repo
run the tests
```
./.github/regression.sh
```

NOTE

When using CI_BYRON_CLUSTER, it takes ~ 30 minutes for local cluster instance to get from Byron to Conway. If it seems that tests are stuck, they are likely just waiting for local cluster instances to be fully started.

Running individual tests on persistent local cluster using Nix

Sometimes it is useful to run individual tests and keep the local cluster running in between test runs.

run nix shell that has all the needed dependencies

nix flake update --accept-flake-config --override-input cardano-node "github:IntersectMBO/cardano-node/master"  # change `master` to rev you want
nix develop --accept-flake-config

prepare testing environment
```
source ./prepare_test_env.sh conway
```

start the cluster instance

./dev_workdir/conway_fast/start-cluster

run some test

pytest -s -k test_minting_one_token cardano_node_tests/tests/tests_plutus
# or run some tests and see all the executed `cardano-cli` commands
pytest -s --log-level=debug -k test_minting_one_token cardano_node_tests/tests/tests_plutus

stop the cluster instance
```
./dev_workdir/conway_fast/stop-cluster
```

To reuse the existing testing environment in another nix shell, source the .source file that was generated during setup:

source ./dev_workdir/.source

Variables for configuring testrun

Tests execution can be configured using env variables.

SCHEDULING_LOG – specifies the path to the file where log messages for tests and cluster instance scheduler are stored
PYTEST_ARGS – specifies additional arguments for pytest (default: unset)
MARKEXPR – specifies marker expression for pytest (default: unset)
TEST_THREADS – specifies the number of pytest workers (default: 20)
CLUSTERS_COUNT – number of cluster instances that will be started (default: 9)
CLUSTER_ERA – cluster era for Cardano node – used for selecting the correct cluster start script (default: conway)
COMMAND_ERA – era for cardano-cli commands – can be used for creating Shelley-era (Allegra-era, …) transactions (default: unset)
NUM_POOLS – number of stake pools created in each cluster instance (default: 3)
ENABLE_LEGACY – use legacy networking instead of the default P2P networking (default: unset)
MIXED_P2P – use mix of P2P and legacy networking; half of stake pools using legacy and the other half P2P (default: unset)
UTXO_BACKEND – ‘mem’ or ‘disk’, default is ‘mem’ (or legacy) backend if unset (default: unset)
SCRIPTS_DIRNAME – path to a dir with local cluster start/stop scripts and configuration files (default: unset)
BOOTSTRAP_DIR – path to a bootstrap dir for the given testnet (genesis files, config files, faucet data) (default: unset)
KEEP_CLUSTERS_RUNNING – don’t stop cluster instances after testrun is finished (WARNING: this implies interactive behavior when running tests using the ./.github/regression.sh script)

When running tests using the ./.github/regression.sh script, you can also use

CI_BYRON_CLUSTER - start local cluster in Byron era, and progress to later eras by HFs (same effect as SCRIPTS_DIRNAME=conway)
NODE_REV - revison of cardano-node (default: ‘master’)
DBSYNC_REV - revison of cardano-db-sync (default: unset; db-sync is not used by default)
CARDANO_CLI_REV - revison of cardano-cli (default: unset; cardano-cli bundled in cardano-node repo is used by default)
PLUTUS_APPS_REV - revison of plutus-apps (default: ‘main’)

For example:

running tests on local cluster intances, each with 6 stake pools and mix of P2P and legacy networking
```
NUM_POOLS=6 MIXED_P2P=1 ./.github/regression.sh
```
running tests on local cluster intances using 15 pytest workers, Conway cluster era, cluster scripts that start a cluster directly in Conway era, and selecting only tests without ‘long’ marker that also match the given -k pytest argument
```
TEST_THREADS=15 CLUSTER_ERA=conway SCRIPTS_DIRNAME=conway_fast PYTEST_ARGS="-k 'test_stake_pool_low_cost or test_reward_amount'" MARKEXPR="not long" ./.github/regression.sh
```

running tests on Shelley-qa testnet with ‘8.0.0’ release of cardano-node

NODE_REV=8.0.0 BOOTSTRAP_DIR=~/tmp/shelley_qa_config/ ./.github/regression.sh

Local usage for tests development (useful only for tests developers)

Install and configure nix, follow cardano-node documentation. Install and configure poetry, follow Poetry documentation.

Preparing Python virtual environment

Create a Python virtual environment (requires Python v3.8 or newer) and install this package together with development requirements:

./setup_dev_venv.sh

Running development cluster

When running tests, the testing framework starts and stops cluster instances as needed. That is not ideal for test development, as starting a cluster instance can take up to several epochs (to get from Byron to Conway). To keep the Cardano cluster running in between test runs, one needs to start it in ‘development mode’:

cd to ‘cardano-node’ repo
```
cd ../cardano-node
```

update and checkout the desired commit/tag

git checkout master
git pull origin master
git fetch --all --tags
git checkout tags/<tag>

launch devops shell
```
nix develop .#devops
```
run fresh login shell on top of the current nix shell (to get the correct environment variables)
```
/bin/bash --login
```
cd back to ‘cardano-node-tests’ repo
```
cd ../cardano-node-tests
```
activate virtual env
```
poetry shell
```

add virtual env to PYTHONPATH

export PYTHONPATH="$(echo $VIRTUAL_ENV/lib/python3*/site-packages)":$PYTHONPATH

set env variables

export CARDANO_NODE_SOCKET_PATH="$PWD/dev_workdir/state-cluster0/bft1.socket" DEV_CLUSTER_RUNNING=1
mkdir -p "${CARDANO_NODE_SOCKET_PATH%/*}"

prepare cluster scripts for starting local cluster directly in Conway era

prepare-cluster-scripts -c -d dev_workdir/conway_fast -s cardano_node_tests/cluster_scripts/conway_fast/

start the cluster instance in development mode
```
./dev_workdir/conway_fast/start-cluster
```

After the cluster starts, keys and configuration files are available in the ./dev_workdir/state-cluster0 directory. The pool-related files and keys are located in the nodes subdirectory, genesis keys in the shelley and byron subdirectories, and payment address with initial funds and related keys in the byron subdirectory. The local faucet address and related key files are stored in the addrs_data subdirectory.

Restarting development cluster

To restart the running cluster (eg, after upgrading cardano-node and cardano-cli binaries), run:

./scripts/restart_dev_cluster.sh

NOTE

Restaring the running development cluster is useful mainly when using the “conway” start scripts (not the “conway_fast” version). It takes ~ 30 minutes for the local cluster instance to get from Byron to Conway. Starting local cluster using the “conway_fast” version takes less than 1 minute.

Checking the development environment

To check that the development environment was correctly setup, run the ./check_dev_env.sh script.

$ ./check_dev_env.sh
'cardano-node' available: ✔
'cardano-cli' available: ✔
'python' available: ✔
'pytest' available: ✔
'nix-shell' available: ✔
'jq' available: ✔
'supervisord' available: ✔
'supervisorctl' available: ✔
'bech32' available: ✔
inside nix shell: ✔
in repo root: ✔
DEV cluster: ✔
python works: ✔
in python venv: ✔
venv in PYTHONPATH: ✔
cardano-node-tests installed: ✔
pytest works: ✔
same version of node and cli: ✔
socket path set: ✔
socket path correct: ✔
socket path exists: ✔
cluster era: default
command era: latest
using dbsync (optional): ✔
dbsync available: ✔
'psql' available: ✔
P2P network (optional): -

Running individual tests

Example:

pytest -k "test_name1 or test_name2" cardano_node_tests
pytest -m "not long" cardano_node_tests
pytest -m smoke cardano_node_tests/tests/test_governance.py

Running linters

It is sufficient to activate the Python virtual environment before running linters, development cluster is not needed:

activate virtual env
```
poetry shell
```
run linters
```
make lint
```

Installing `cardano-clusterlib` in development mode

Sometimes it is useful to test local changes made to cardano-clusterlib. To install cardano-clusterlib in development mode:

activate virtual env
```
poetry shell
```
update virtual env (answer ‘y’ to question “Install into the current virtual env? [y/N]”)
```
./setup_dev_venv.sh
```
uninstall cardano-clusterlib installed by poetry
```
pip uninstall cardano-clusterlib
```
cd to ‘cardano-clusterlib-py’ repo
```
cd ../cardano-clusterlib-py
```

install cardano-clusterlib in development mode

pip install -e . --config-settings editable_mode=compat

cd back to ‘cardano-node-tests’ repo
```
cd -
```

check that you are really using cardano-clusterlib files from your local repo

python -c 'from cardano_clusterlib import clusterlib_klass; print(clusterlib_klass.__file__)'

Note that after you run poetry install (eg through running ./setup_dev_venv.sh), poetry will reinstall cardano-clusterlib. If you want to keep using cardano-clusterlib in development mode, you’ll need to repeat the steps above.

Updating dependencies using poetry

Edit pyproject.toml and run

./poetry_update_deps.sh

Building documentation

Build and deploy documentation:

./deploy_doc.sh

Contributing

Install this package and its dependencies as described above.

Run pre-commit install to set up the Git hook scripts that will check your changes before every commit. Alternatively, run make lint manually before pushing your changes.

Follow the Google Python Style Guide, with the exception that formatting is handled automatically by Black (through the pre-commit command).

See the CONTRIBUTING document for more details.