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from typing import Generator
from typing import Optional
from typing import Union
import pytest
from _pytest._io.saferepr import saferepr
from _pytest.config import Config
from _pytest.config import ExitCode
from _pytest.config.argparsing import Parser
from _pytest.fixtures import FixtureDef
from _pytest.fixtures import SubRequest
from _pytest.scope import Scope
def pytest_addoption(parser: Parser) -> None:
group = parser.getgroup("debugconfig")
group.addoption(
"--setuponly",
"--setup-only",
action="store_true",
help="Only setup fixtures, do not execute tests",
)
group.addoption(
"--setupshow",
"--setup-show",
action="store_true",
help="Show setup of fixtures while executing tests",
)
@pytest.hookimpl(hookwrapper=True)
def pytest_fixture_setup(
fixturedef: FixtureDef[object], request: SubRequest
) -> Generator[None, None, None]:
yield
if request.config.option.setupshow:
if hasattr(request, "param"):
# Save the fixture parameter so ._show_fixture_action() can
# display it now and during the teardown (in .finish()).
if fixturedef.ids:
if callable(fixturedef.ids):
param = fixturedef.ids(request.param)
else:
param = fixturedef.ids[request.param_index]
else:
param = request.param
fixturedef.cached_param = param # type: ignore[attr-defined]
_show_fixture_action(fixturedef, "SETUP")
def pytest_fixture_post_finalizer(fixturedef: FixtureDef[object]) -> None:
if fixturedef.cached_result is not None:
config = fixturedef._fixturemanager.config
if config.option.setupshow:
_show_fixture_action(fixturedef, "TEARDOWN")
if hasattr(fixturedef, "cached_param"):
del fixturedef.cached_param # type: ignore[attr-defined]
def _show_fixture_action(fixturedef: FixtureDef[object], msg: str) -> None:
config = fixturedef._fixturemanager.config
capman = config.pluginmanager.getplugin("capturemanager")
if capman:
capman.suspend_global_capture()
tw = config.get_terminal_writer()
tw.line()
# Use smaller indentation the higher the scope: Session = 0, Package = 1, etc.
scope_indent = list(reversed(Scope)).index(fixturedef._scope)
tw.write(" " * 2 * scope_indent)
tw.write(
"{step} {scope} {fixture}".format(
step=msg.ljust(8), # align the output to TEARDOWN
scope=fixturedef.scope[0].upper(),
fixture=fixturedef.argname,
)
)
if msg == "SETUP":
deps = sorted(arg for arg in fixturedef.argnames if arg != "request")
if deps:
tw.write(" (fixtures used: {})".format(", ".join(deps)))
if hasattr(fixturedef, "cached_param"):
tw.write(f"[{saferepr(fixturedef.cached_param, maxsize=42)}]") # type: ignore[attr-defined]
tw.flush()
if capman:
capman.resume_global_capture()
@pytest.hookimpl(tryfirst=True)
def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
if config.option.setuponly:
config.option.setupshow = True
return None