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3e5d0784b9
This changes intends to reduce the bar to the kernel unit-testing by
introducing a new kernel-testing framework ("ktest") based on Netlink,
loadable test modules and python test suite integration.
This framework provides the following features:
* Integration to the FreeBSD test suite
* Automatic test discovery
* Automatic test module loading
* Minimal boiler-plate code in both kernel and userland
* Passing any metadata to the test
* Convenient environment pre-setup using python testing framework
* Streaming messages from the kernel to the userland
* Running tests in the dedicated taskqueues
* Skipping or parametrizing tests
Differential Revision: https://reviews.freebsd.org/D39385
MFC after: 2 weeks
299 lines
11 KiB
Python
299 lines
11 KiB
Python
import types
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from typing import Any
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from typing import Dict
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from typing import List
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from typing import NamedTuple
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from typing import Optional
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from typing import Tuple
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from atf_python.ktest import generate_ktests
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from atf_python.utils import nodeid_to_method_name
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import pytest
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import os
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class ATFCleanupItem(pytest.Item):
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def runtest(self):
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"""Runs cleanup procedure for the test instead of the test itself"""
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instance = self.parent.cls()
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cleanup_name = "cleanup_{}".format(nodeid_to_method_name(self.nodeid))
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if hasattr(instance, cleanup_name):
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cleanup = getattr(instance, cleanup_name)
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cleanup(self.nodeid)
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elif hasattr(instance, "cleanup"):
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instance.cleanup(self.nodeid)
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def setup_method_noop(self, method):
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"""Overrides runtest setup method"""
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pass
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def teardown_method_noop(self, method):
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"""Overrides runtest teardown method"""
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pass
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class ATFTestObj(object):
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def __init__(self, obj, has_cleanup):
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# Use nodeid without name to properly name class-derived tests
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self.ident = obj.nodeid.split("::", 1)[1]
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self.description = self._get_test_description(obj)
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self.has_cleanup = has_cleanup
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self.obj = obj
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def _get_test_description(self, obj):
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"""Returns first non-empty line from func docstring or func name"""
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if getattr(obj, "descr", None) is not None:
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return getattr(obj, "descr")
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docstr = obj.function.__doc__
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if docstr:
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for line in docstr.split("\n"):
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if line:
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return line
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return obj.name
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@staticmethod
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def _convert_user_mark(mark, obj, ret: Dict):
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username = mark.args[0]
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if username == "unprivileged":
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# Special unprivileged user requested.
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# First, require the unprivileged-user config option presence
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key = "require.config"
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if key not in ret:
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ret[key] = "unprivileged_user"
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else:
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ret[key] = "{} {}".format(ret[key], "unprivileged_user")
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# Check if the framework requires root
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test_cls = ATFHandler.get_test_class(obj)
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if test_cls and getattr(test_cls, "NEED_ROOT", False):
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# Yes, so we ask kyua to run us under root instead
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# It is up to the implementation to switch back to the desired
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# user
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ret["require.user"] = "root"
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else:
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ret["require.user"] = username
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def _convert_marks(self, obj) -> Dict[str, Any]:
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wj_func = lambda x: " ".join(x) # noqa: E731
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_map: Dict[str, Dict] = {
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"require_user": {"handler": self._convert_user_mark},
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"require_arch": {"name": "require.arch", "fmt": wj_func},
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"require_diskspace": {"name": "require.diskspace"},
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"require_files": {"name": "require.files", "fmt": wj_func},
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"require_machine": {"name": "require.machine", "fmt": wj_func},
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"require_memory": {"name": "require.memory"},
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"require_progs": {"name": "require.progs", "fmt": wj_func},
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"timeout": {},
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}
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ret = {}
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for mark in obj.iter_markers():
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if mark.name in _map:
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if "handler" in _map[mark.name]:
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_map[mark.name]["handler"](mark, obj, ret)
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continue
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name = _map[mark.name].get("name", mark.name)
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if "fmt" in _map[mark.name]:
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val = _map[mark.name]["fmt"](mark.args[0])
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else:
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val = mark.args[0]
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ret[name] = val
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return ret
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def as_lines(self) -> List[str]:
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"""Output test definition in ATF-specific format"""
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ret = []
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ret.append("ident: {}".format(self.ident))
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ret.append("descr: {}".format(self._get_test_description(self.obj)))
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if self.has_cleanup:
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ret.append("has.cleanup: true")
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for key, value in self._convert_marks(self.obj).items():
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ret.append("{}: {}".format(key, value))
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return ret
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class ATFHandler(object):
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class ReportState(NamedTuple):
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state: str
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reason: str
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def __init__(self, report_file_name: Optional[str]):
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self._tests_state_map: Dict[str, ReportStatus] = {}
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self._report_file_name = report_file_name
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self._report_file_handle = None
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def setup_configure(self):
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fname = self._report_file_name
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if fname:
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self._report_file_handle = open(fname, mode="w")
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def setup_method_pre(self, item):
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"""Called before actually running the test setup_method"""
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# Check if we need to manually drop the privileges
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for mark in item.iter_markers():
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if mark.name == "require_user":
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cls = self.get_test_class(item)
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cls.TARGET_USER = mark.args[0]
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break
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def override_runtest(self, obj):
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# Override basic runtest command
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obj.runtest = types.MethodType(ATFCleanupItem.runtest, obj)
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# Override class setup/teardown
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obj.parent.cls.setup_method = ATFCleanupItem.setup_method_noop
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obj.parent.cls.teardown_method = ATFCleanupItem.teardown_method_noop
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@staticmethod
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def get_test_class(obj):
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if hasattr(obj, "parent") and obj.parent is not None:
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if hasattr(obj.parent, "cls"):
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return obj.parent.cls
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def has_object_cleanup(self, obj):
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cls = self.get_test_class(obj)
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if cls is not None:
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method_name = nodeid_to_method_name(obj.nodeid)
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cleanup_name = "cleanup_{}".format(method_name)
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if hasattr(cls, "cleanup") or hasattr(cls, cleanup_name):
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return True
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return False
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def _generate_test_cleanups(self, items):
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new_items = []
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for obj in items:
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if self.has_object_cleanup(obj):
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self.override_runtest(obj)
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new_items.append(obj)
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items.clear()
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items.extend(new_items)
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def expand_tests(self, collector, name, obj):
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return generate_ktests(collector, name, obj)
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def modify_tests(self, items, config):
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if config.option.atf_cleanup:
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self._generate_test_cleanups(items)
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def list_tests(self, tests: List[str]):
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print('Content-Type: application/X-atf-tp; version="1"')
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print()
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for test_obj in tests:
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has_cleanup = self.has_object_cleanup(test_obj)
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atf_test = ATFTestObj(test_obj, has_cleanup)
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for line in atf_test.as_lines():
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print(line)
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print()
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def set_report_state(self, test_name: str, state: str, reason: str):
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self._tests_state_map[test_name] = self.ReportState(state, reason)
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def _extract_report_reason(self, report):
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data = report.longrepr
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if data is None:
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return None
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if isinstance(data, Tuple):
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# ('/path/to/test.py', 23, 'Skipped: unable to test')
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reason = data[2]
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for prefix in "Skipped: ":
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if reason.startswith(prefix):
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reason = reason[len(prefix):]
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return reason
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else:
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# string/ traceback / exception report. Capture the last line
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return str(data).split("\n")[-1]
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return None
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def add_report(self, report):
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# MAP pytest report state to the atf-desired state
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#
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# ATF test states:
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# (1) expected_death, (2) expected_exit, (3) expected_failure
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# (4) expected_signal, (5) expected_timeout, (6) passed
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# (7) skipped, (8) failed
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#
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# Note that ATF don't have the concept of "soft xfail" - xpass
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# is a failure. It also calls teardown routine in a separate
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# process, thus teardown states (pytest-only) are handled as
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# body continuation.
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# (stage, state, wasxfail)
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# Just a passing test: WANT: passed
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# GOT: (setup, passed, F), (call, passed, F), (teardown, passed, F)
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#
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# Failing body test: WHAT: failed
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# GOT: (setup, passed, F), (call, failed, F), (teardown, passed, F)
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#
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# pytest.skip test decorator: WANT: skipped
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# GOT: (setup,skipped, False), (teardown, passed, False)
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#
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# pytest.skip call inside test function: WANT: skipped
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# GOT: (setup, passed, F), (call, skipped, F), (teardown,passed, F)
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#
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# mark.xfail decorator+pytest.xfail: WANT: expected_failure
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# GOT: (setup, passed, F), (call, skipped, T), (teardown, passed, F)
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#
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# mark.xfail decorator+pass: WANT: failed
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# GOT: (setup, passed, F), (call, passed, T), (teardown, passed, F)
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test_name = report.location[2]
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stage = report.when
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state = report.outcome
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reason = self._extract_report_reason(report)
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# We don't care about strict xfail - it gets translated to False
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if stage == "setup":
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if state in ("skipped", "failed"):
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# failed init -> failed test, skipped setup -> xskip
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# for the whole test
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self.set_report_state(test_name, state, reason)
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elif stage == "call":
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# "call" stage shouldn't matter if setup failed
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if test_name in self._tests_state_map:
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if self._tests_state_map[test_name].state == "failed":
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return
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if state == "failed":
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# Record failure & override "skipped" state
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self.set_report_state(test_name, state, reason)
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elif state == "skipped":
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if hasattr(reason, "wasxfail"):
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# xfail() called in the test body
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state = "expected_failure"
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else:
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# skip inside the body
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pass
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self.set_report_state(test_name, state, reason)
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elif state == "passed":
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if hasattr(reason, "wasxfail"):
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# the test was expected to fail but didn't
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# mark as hard failure
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state = "failed"
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self.set_report_state(test_name, state, reason)
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elif stage == "teardown":
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if state == "failed":
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# teardown should be empty, as the cleanup
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# procedures should be implemented as a separate
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# function/method, so mark teardown failure as
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# global failure
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self.set_report_state(test_name, state, reason)
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def write_report(self):
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if self._report_file_handle is None:
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return
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if self._tests_state_map:
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# If we're executing in ATF mode, there has to be just one test
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# Anyway, deterministically pick the first one
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first_test_name = next(iter(self._tests_state_map))
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test = self._tests_state_map[first_test_name]
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if test.state == "passed":
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line = test.state
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else:
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line = "{}: {}".format(test.state, test.reason)
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print(line, file=self._report_file_handle)
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self._report_file_handle.close()
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@staticmethod
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def get_atf_vars() -> Dict[str, str]:
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px = "_ATF_VAR_"
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return {k[len(px):]: v for k, v in os.environ.items() if k.startswith(px)}
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