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A pytest plugin to help with testing pop projects

Project description

A pytest plugin to help with testing pop projects

INSTALLATION

Install with pip:

pip install pytest-pop

DEVELOPMENT INSTALLATION

Clone the pytest-pop repo and install with pip:

git clone https://gitlab.com/saltstack/pop/pytest-pop.git
pip install -e pytest-pop

Getting the Hub

Extend the hub fixture in your conftest.py so that it includes your subs:

@pytest.fixture(scope="function")
def hub(hub):
    # TODO Add dynes that will be used for your tests
    for dyne in ("exec", "states"):
        hub.pop.sub.add(dyne_name=dyne)
        if dyne in ("corn", "exec", "states"):
            hub.pop.sub.load_subdirs(getattr(hub, dyne), recurse=True)

    args = [
        # TODO patch in whatever cli args are necessary to run your test
    ]
    with mock.patch("sys.argv", ["pytest-pop"] + args):
        hub.pop.config.load(["pytest_pop"], "pytest_pop")

    yield hub

    # TODO Hub cleanup
    pass

Markers

Make use of pytest markers from pytest-salt-factoroies

root

Marks a test as needing elevated privileges. On UNIX-like systems the test will be skipped if the user running the tests is not root. On Windows systems the test will be skipped if the tests aren’t run with admin privileges.

Example:

@pytest.mark.skip_if_not_root
def test_root(hub):
    pass

expensive

Marks a test as being expensive. Run pytest with the ‘–run-expensive’ flag or set the EXPENSIVE_TESTS environment variable to “True” to run these tests. By default they will be skipped

Example:

@pytest.mark.expensive_test
def test_expensive(hub):
    pass

destructive

Marks a test as being destructive. Run pytest with the ‘–run-destructive’ flag or set the DESTRUCTIVE_TESTS environment variable to “True” to run these tests. By default they will be skipped

Example:

@pytest.mark.destructive_test
def test_destructive(hub):
    pass

Logging

You can use the hub to log without setting up a logger in every single file that uses a hub

Example:

hub.log.debug("debug message")

Be sure to run pytest with ‘–cli-log-level=10’ in order to see debug messages

Mocking

Get access to a fully mocked/autospecced version of the hub with:

mock_hub = hub.pop.testing.mock_hub()

A mock_hub fixture with common substitutions of real plugins is available as a fixture:

def test_thing(mock_hub):
    pass

Extend the mock hub in your own fixture:

# Scope the mock_hub to a function so that the autospec gets reset after each use.
@pytest.fixture(scope="function")
def mock_hub(mock_hub, hub):
    # replace mocked functions with necessary real ones
    # extend this on a per-module or per-function basis if necessary
    mock_hub.sub.func = hub.sub.func
    yield mock_hub

You can now do autospec assertions on contracted functions:

import project.sub.plugin as plugin

def test_cmd_run(mock_hub):
    plugin.func(mock_hub, "arg")
    mock_hub.sub.plugin.func.assert_called_with("arg")

ACCT

Some projects, specifically idem-cloud need credentials from idem’s ctx generator. A ctx fixture exists, but it won’t work unless you override the acct_file and acct_profile fixtures:

@pytest.fixture
def acct_subs() -> List[str]:
    return ["azurerm", "vultr"]


@pytest.fixture
def acct_profile() -> str:
    return "test_development_idem_cloud"

Once these fixtures are overridden, the ctx fixture will become available to your test:

test_cloud_instance_present(hub, ctx):
    hub.state.cloud.present(ctx, "instance_name")

Examples

Mock a hub exec function:

with patch.object(mock_hub.exec, 'dummy', return_value="some result") as mock_exec:
    pass

Set return value for mock_hub function:

mock_hub.sub.function.return_value = "Pass"

Mock hub assert called with:

mock_hub.sub.function.assert_called_with("myinput", True)

Project details


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