ops-harness
ops-harness provides Harness, the legacy unit-testing API for charms built
with the ops framework. It packages the
Harness class as a standalone distribution that ops re-exports as
ops.testing.Harness -- the same way ops re-exports the ops-scenario
package's state-transition API under ops.testing.
[!IMPORTANT]
Harnessis deprecated. For new charms, and where reasonable for existing charms, prefer the state-transition testing API inops.testing(theops-scenariopackage).ops-harnessexists so that charms that still rely onHarnesscan continue to do so as the class is removed from the coreopsdistribution.
ops-harnessrequires Python 3.8 or above.- It depends on
ops2.23 or above.
Installation
pip install ops-harness
Or, with uv:
uv add ops-harness
Usage
Add ops-harness to your charm's test dependencies, then import Harness from
ops.testing:
from ops.testing import Harness
from charm import MyCharm
def test_config_changed():
harness = Harness(MyCharm, meta="name: my-charm")
harness.begin()
harness.update_config({"log-level": "debug"})
assert harness.charm.model.config["log-level"] == "debug"
harness.cleanup()
For the full API, see the
ops.testing.Harness reference documentation.
Contributing and developing
Anyone can contribute to ops-harness. See CONTRIBUTING.md
for the contribution process, and HACKING.md for how to set up a
development environment and run the tests.
Code of conduct
When contributing, you must abide by the Ubuntu Code of Conduct.
License
ops-harness is free software, distributed under the Apache Software License,
version 2.0. See LICENSE for details.
1 maintainer
Metadata
1 maintainer
Release files for ops-harness 0.1
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