Add support for 'pytest --runslow' (#151)

* Add support for 'pytest --runslow'

* Add --runweekly support; code reviewer updates

Author: stevebachmeier

libs/build-utils/CHANGELOG.rst

@@ -1,3 +1,7 @@
+**4.0.2 - 06/24/26**
+
+- Add ``--runslow`` and ``--runweekly`` support to pytest calls so that Jenkins builds pass
+
 **4.0.1 - 06/23/26**
 
 - Bugfix: Fix ``__run_pip_dry_run()`` to handle vbu self-bootstrap case

libs/build-utils/tests/conftest.py

@@ -0,0 +1,37 @@
+"""Pytest configuration for vivarium-build-utils' own test suite.
+
+This deliberately duplicates the ``--runslow`` and ``--runweekly`` handling
+from ``vivarium.testing_utils``' pytest plugin. vbu cannot depend on
+vivarium-testing-utils to pick up that plugin, because vtu depends on vbu;
+registering the options here lets the shared Jenkins ``pytest`` invocations
+(which pass ``--runslow`` and ``--runweekly``) run against vbu without erroring
+on an unrecognized option.
+"""
+
+import pytest
+
+
+def pytest_addoption(parser: pytest.Parser) -> None:
+    parser.addoption("--runslow", action="store_true", default=False, help="run slow tests")
+    parser.addoption(
+        "--runweekly", action="store_true", default=False, help="run weekly tests"
+    )
+
+
+def pytest_configure(config: pytest.Config) -> None:
+    config.addinivalue_line("markers", "slow: mark test as slow to run")
+    config.addinivalue_line("markers", "weekly: mark test as a weekly test")
+
+
+def pytest_collection_modifyitems(config: pytest.Config, items: list[pytest.Item]) -> None:
+    if not config.getoption("--runslow"):
+        skip_slow = pytest.mark.skip(reason="need --runslow option to run")
+        for item in items:
+            if item.get_closest_marker("slow"):
+                item.add_marker(skip_slow)
+
+    if not config.getoption("--runweekly"):
+        skip_weekly = pytest.mark.skip(reason="need --runweekly option to run")
+        for item in items:
+            if item.get_closest_marker("weekly"):
+                item.add_marker(skip_weekly)