120 lines
4.1 KiB
Python
120 lines
4.1 KiB
Python
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from typing import List
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from typing import Optional
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from typing import TYPE_CHECKING
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import pytest
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from _pytest import nodes
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from _pytest.config import Config
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from _pytest.config.argparsing import Parser
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from _pytest.main import Session
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from _pytest.reports import TestReport
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if TYPE_CHECKING:
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from _pytest.cacheprovider import Cache
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STEPWISE_CACHE_DIR = "cache/stepwise"
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def pytest_addoption(parser: Parser) -> None:
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group = parser.getgroup("general")
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group.addoption(
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"--sw",
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"--stepwise",
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action="store_true",
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default=False,
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dest="stepwise",
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help="exit on test failure and continue from last failing test next time",
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)
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group.addoption(
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"--sw-skip",
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"--stepwise-skip",
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action="store_true",
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default=False,
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dest="stepwise_skip",
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help="ignore the first failing test but stop on the next failing test",
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)
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@pytest.hookimpl
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def pytest_configure(config: Config) -> None:
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# We should always have a cache as cache provider plugin uses tryfirst=True
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if config.getoption("stepwise"):
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config.pluginmanager.register(StepwisePlugin(config), "stepwiseplugin")
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def pytest_sessionfinish(session: Session) -> None:
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if not session.config.getoption("stepwise"):
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assert session.config.cache is not None
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# Clear the list of failing tests if the plugin is not active.
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session.config.cache.set(STEPWISE_CACHE_DIR, [])
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class StepwisePlugin:
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def __init__(self, config: Config) -> None:
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self.config = config
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self.session: Optional[Session] = None
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self.report_status = ""
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assert config.cache is not None
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self.cache: Cache = config.cache
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self.lastfailed: Optional[str] = self.cache.get(STEPWISE_CACHE_DIR, None)
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self.skip: bool = config.getoption("stepwise_skip")
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def pytest_sessionstart(self, session: Session) -> None:
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self.session = session
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def pytest_collection_modifyitems(
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self, config: Config, items: List[nodes.Item]
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) -> None:
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if not self.lastfailed:
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self.report_status = "no previously failed tests, not skipping."
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return
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# check all item nodes until we find a match on last failed
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failed_index = None
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for index, item in enumerate(items):
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if item.nodeid == self.lastfailed:
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failed_index = index
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break
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# If the previously failed test was not found among the test items,
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# do not skip any tests.
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if failed_index is None:
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self.report_status = "previously failed test not found, not skipping."
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else:
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self.report_status = f"skipping {failed_index} already passed items."
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deselected = items[:failed_index]
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del items[:failed_index]
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config.hook.pytest_deselected(items=deselected)
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def pytest_runtest_logreport(self, report: TestReport) -> None:
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if report.failed:
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if self.skip:
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# Remove test from the failed ones (if it exists) and unset the skip option
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# to make sure the following tests will not be skipped.
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if report.nodeid == self.lastfailed:
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self.lastfailed = None
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self.skip = False
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else:
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# Mark test as the last failing and interrupt the test session.
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self.lastfailed = report.nodeid
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assert self.session is not None
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self.session.shouldstop = (
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"Test failed, continuing from this test next run."
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)
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else:
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# If the test was actually run and did pass.
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if report.when == "call":
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# Remove test from the failed ones, if exists.
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if report.nodeid == self.lastfailed:
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self.lastfailed = None
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def pytest_report_collectionfinish(self) -> Optional[str]:
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if self.config.getoption("verbose") >= 0 and self.report_status:
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return f"stepwise: {self.report_status}"
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return None
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def pytest_sessionfinish(self) -> None:
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self.cache.set(STEPWISE_CACHE_DIR, self.lastfailed)
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