conftest.py

# SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0

# pylint: disable=W0621  # redefined-outer-name

# This file is a pytest root configuration file and provide the following functionalities:
# 1. Defines a few fixtures that could be used under the whole project.
# 2. Defines a few hook functions.
#
# IDF is using [pytest](https://github.com/pytest-dev/pytest) and
# [pytest-embedded plugin](https://github.com/espressif/pytest-embedded) as its example test framework.
#
# This is an experimental feature, and if you found any bug or have any question, please report to
# https://github.com/espressif/pytest-embedded/issues

import logging
import os
import xml.etree.ElementTree as ET
from datetime import datetime
from typing import Callable, List, Optional, Tuple

import pytest
from _pytest.config import Config, ExitCode
from _pytest.fixtures import FixtureRequest
from _pytest.main import Session
from _pytest.nodes import Item
from _pytest.python import Function
from _pytest.reports import TestReport
from _pytest.runner import CallInfo
from _pytest.terminal import TerminalReporter
from pytest_embedded.plugin import multi_dut_argument, multi_dut_fixture
from pytest_embedded.utils import find_by_suffix


DEFAULT_SDKCONFIG = 'default'


##################
# Help Functions #
##################
def format_case_id(target: Optional[str], config: Optional[str], case: str) -> str:
    return f'{target}.{config}.{case}'


def item_marker_names(item: Item) -> List[str]:
    return [marker.name for marker in item.iter_markers()]


############
# Fixtures #
############
@pytest.fixture(scope='session', autouse=True)
def session_tempdir() -> str:
    _tmpdir = os.path.join(
        os.path.dirname(__file__),
        'pytest_embedded_log',
        datetime.now().strftime('%Y-%m-%d_%H-%M-%S'),
    )
    os.makedirs(_tmpdir, exist_ok=True)
    return _tmpdir


@pytest.fixture
@multi_dut_argument
def config(request: FixtureRequest) -> str:
    return getattr(request, 'param', None) or DEFAULT_SDKCONFIG


@pytest.fixture
def test_func_name(request: FixtureRequest) -> str:
    return request.node.function.__name__  # type: ignore


@pytest.fixture
def test_case_name(request: FixtureRequest, target: str, config: str) -> str:
    return format_case_id(target, config, request.node.originalname)


@pytest.fixture
@multi_dut_fixture
def build_dir(app_path: str, target: Optional[str], config: Optional[str]) -> str:
    """
    Check local build dir with the following priority:

    1. build_<target>_<config>
    2. build_<target>
    3. build_<config>
    4. build

    Args:
        app_path: app path
        target: target
        config: config

    Returns:
        valid build directory
    """

    check_dirs = []
    if target is not None and config is not None:
        check_dirs.append(f'build_{target}_{config}')
    if target is not None:
        check_dirs.append(f'build_{target}')
    if config is not None:
        check_dirs.append(f'build_{config}')
    check_dirs.append('build')

    for check_dir in check_dirs:
        binary_path = os.path.join(app_path, check_dir)
        if os.path.isdir(binary_path):
            logging.info(f'find valid binary path: {binary_path}')
            return check_dir

        logging.warning(
            'checking binary path: %s... missing... try another place', binary_path
        )

    recommend_place = check_dirs[0]
    raise ValueError(
        f'no build dir valid. Please build the binary via "idf.py -B {recommend_place} build" and run pytest again'
    )


@pytest.fixture(autouse=True)
@multi_dut_fixture
def junit_properties(
    test_case_name: str, record_xml_attribute: Callable[[str, object], None]
) -> None:
    """
    This fixture is autoused and will modify the junit report test case name to <target>.<config>.<case_name>
    """
    record_xml_attribute('name', test_case_name)


##################
# Hook functions #
##################
_idf_pytest_embedded_key = pytest.StashKey['IdfPytestEmbedded']


def pytest_configure(config: Config) -> None:
    # cli option "--target"
    target = config.getoption('target') or ''

    help_commands = ['--help', '--fixtures', '--markers', '--version']
    for cmd in help_commands:
        if cmd in config.invocation_params.args:
            target = 'unneeded'
            break

    assert target, "Must specify target by --target"

    config.stash[_idf_pytest_embedded_key] = IdfPytestEmbedded(
        target=target,
    )
    config.pluginmanager.register(config.stash[_idf_pytest_embedded_key])


def pytest_unconfigure(config: Config) -> None:
    _pytest_embedded = config.stash.get(_idf_pytest_embedded_key, None)
    if _pytest_embedded:
        del config.stash[_idf_pytest_embedded_key]
        config.pluginmanager.unregister(_pytest_embedded)


class IdfPytestEmbedded:
    def __init__(
        self,
        target: Optional[str] = None,
    ):
        # CLI options to filter the test cases
        self.target = target
        self._failed_cases: List[
            Tuple[str, bool, bool]
        ] = []  # (test_case_name, is_known_failure_cases, is_xfail)

    @property
    def failed_cases(self) -> List[str]:
        return [
            case
            for case, is_xfail in self._failed_cases
            if not is_xfail
        ]

    @property
    def xfail_cases(self) -> List[str]:
        return [case for case, is_xfail in self._failed_cases if is_xfail]

    @pytest.hookimpl(tryfirst=True)
    def pytest_sessionstart(self, session: Session) -> None:
        if self.target:
            self.target = self.target.lower()
            session.config.option.target = self.target

    @pytest.hookimpl(tryfirst=True)
    def pytest_collection_modifyitems(self, items: List[Function]) -> None:
        # sort by file path and callspec.config
        # implement like this since this is a limitation of pytest, couldn't get fixture values while collecting
        # https://github.com/pytest-dev/pytest/discussions/9689
        def _get_param_config(_item: Function) -> str:
            if hasattr(_item, 'callspec'):
                return _item.callspec.params.get('config', DEFAULT_SDKCONFIG)  # type: ignore
            return DEFAULT_SDKCONFIG

        items.sort(key=lambda x: (os.path.dirname(x.path), _get_param_config(x)))

        # set default timeout 10 minutes for each case
        for item in items:
            if 'timeout' not in item.keywords:
                item.add_marker(pytest.mark.timeout(10 * 60))

        # filter all the test cases with "--target"
        if self.target:
            items[:] = [
                item for item in items if self.target in item_marker_names(item)
            ]

    def pytest_runtest_makereport(
        self, item: Function, call: CallInfo[None]
    ) -> Optional[TestReport]:
        report = TestReport.from_item_and_call(item, call)
        if report.outcome == 'failed':
            test_case_name = item.funcargs.get('test_case_name', '')
            is_xfail = report.keywords.get('xfail', False)
            self._failed_cases.append((test_case_name, is_xfail))

        return report

    @pytest.hookimpl(trylast=True)
    def pytest_runtest_teardown(self, item: Function) -> None:
        """
        Format the test case generated junit reports
        """
        tempdir = item.funcargs.get('test_case_tempdir')
        if not tempdir:
            return

        junits = find_by_suffix('.xml', tempdir)
        if not junits:
            return

        target = item.funcargs['target']
        config = item.funcargs['config']
        for junit in junits:
            xml = ET.parse(junit)
            testcases = xml.findall('.//testcase')
            for case in testcases:
                case.attrib['name'] = format_case_id(
                    target, config, case.attrib['name']
                )
                if 'file' in case.attrib:
                    case.attrib['file'] = case.attrib['file'].replace(
                        '/IDF/', ''
                    )  # our unity test framework
            xml.write(junit)

    def pytest_sessionfinish(self, session: Session, exitstatus: int) -> None:
        if exitstatus != 0:
            if exitstatus == ExitCode.NO_TESTS_COLLECTED:
                session.exitstatus = 0

    def pytest_terminal_summary(self, terminalreporter: TerminalReporter) -> None:
        if self.xfail_cases:
            terminalreporter.section('xfail cases', bold=True, yellow=True)
            terminalreporter.line('\n'.join(self.xfail_cases))

        if self.failed_cases:
            terminalreporter.section('Failed cases', bold=True, red=True)
            terminalreporter.line('\n'.join(self.failed_cases))