149 lines
5 KiB
Python
149 lines
5 KiB
Python
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import sys
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import warnings
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from contextlib import contextmanager
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from typing import Generator
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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.config import apply_warning_filters
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from _pytest.config import Config
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from _pytest.config import parse_warning_filter
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from _pytest.main import Session
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from _pytest.nodes import Item
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from _pytest.terminal import TerminalReporter
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if TYPE_CHECKING:
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from typing_extensions import Literal
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def pytest_configure(config: Config) -> None:
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config.addinivalue_line(
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"markers",
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"filterwarnings(warning): add a warning filter to the given test. "
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"see https://docs.pytest.org/en/stable/how-to/capture-warnings.html#pytest-mark-filterwarnings ",
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)
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@contextmanager
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def catch_warnings_for_item(
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config: Config,
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ihook,
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when: "Literal['config', 'collect', 'runtest']",
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item: Optional[Item],
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) -> Generator[None, None, None]:
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"""Context manager that catches warnings generated in the contained execution block.
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``item`` can be None if we are not in the context of an item execution.
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Each warning captured triggers the ``pytest_warning_recorded`` hook.
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"""
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config_filters = config.getini("filterwarnings")
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cmdline_filters = config.known_args_namespace.pythonwarnings or []
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with warnings.catch_warnings(record=True) as log:
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# mypy can't infer that record=True means log is not None; help it.
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assert log is not None
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if not sys.warnoptions:
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# If user is not explicitly configuring warning filters, show deprecation warnings by default (#2908).
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warnings.filterwarnings("always", category=DeprecationWarning)
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warnings.filterwarnings("always", category=PendingDeprecationWarning)
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apply_warning_filters(config_filters, cmdline_filters)
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# apply filters from "filterwarnings" marks
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nodeid = "" if item is None else item.nodeid
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if item is not None:
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for mark in item.iter_markers(name="filterwarnings"):
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for arg in mark.args:
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warnings.filterwarnings(*parse_warning_filter(arg, escape=False))
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yield
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for warning_message in log:
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ihook.pytest_warning_recorded.call_historic(
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kwargs=dict(
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warning_message=warning_message,
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nodeid=nodeid,
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when=when,
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location=None,
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)
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)
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def warning_record_to_str(warning_message: warnings.WarningMessage) -> str:
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"""Convert a warnings.WarningMessage to a string."""
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warn_msg = warning_message.message
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msg = warnings.formatwarning(
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str(warn_msg),
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warning_message.category,
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warning_message.filename,
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warning_message.lineno,
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warning_message.line,
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)
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if warning_message.source is not None:
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try:
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import tracemalloc
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except ImportError:
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pass
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else:
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tb = tracemalloc.get_object_traceback(warning_message.source)
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if tb is not None:
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formatted_tb = "\n".join(tb.format())
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# Use a leading new line to better separate the (large) output
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# from the traceback to the previous warning text.
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msg += f"\nObject allocated at:\n{formatted_tb}"
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else:
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# No need for a leading new line.
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url = "https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings"
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msg += "Enable tracemalloc to get traceback where the object was allocated.\n"
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msg += f"See {url} for more info."
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return msg
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@pytest.hookimpl(hookwrapper=True, tryfirst=True)
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def pytest_runtest_protocol(item: Item) -> Generator[None, None, None]:
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with catch_warnings_for_item(
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config=item.config, ihook=item.ihook, when="runtest", item=item
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):
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yield
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@pytest.hookimpl(hookwrapper=True, tryfirst=True)
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def pytest_collection(session: Session) -> Generator[None, None, None]:
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config = session.config
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with catch_warnings_for_item(
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config=config, ihook=config.hook, when="collect", item=None
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):
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yield
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@pytest.hookimpl(hookwrapper=True)
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def pytest_terminal_summary(
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terminalreporter: TerminalReporter,
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) -> Generator[None, None, None]:
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config = terminalreporter.config
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with catch_warnings_for_item(
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config=config, ihook=config.hook, when="config", item=None
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):
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yield
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@pytest.hookimpl(hookwrapper=True)
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def pytest_sessionfinish(session: Session) -> Generator[None, None, None]:
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config = session.config
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with catch_warnings_for_item(
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config=config, ihook=config.hook, when="config", item=None
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):
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yield
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@pytest.hookimpl(hookwrapper=True)
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def pytest_load_initial_conftests(
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early_config: "Config",
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) -> Generator[None, None, None]:
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with catch_warnings_for_item(
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config=early_config, ihook=early_config.hook, when="config", item=None
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):
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yield
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