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import gc
import re
import sys
import operator
from typing import Callable, Optional, Tuple
import pytest
eur = "\u20ac"
def check_libpq_version(got, want):
"""
Verify if the libpq version is a version accepted.
This function is called on the tests marked with something like::
@pytest.mark.libpq(">= 12")
and skips the test if the requested version doesn't match what's loaded.
"""
return check_version(got, want, "libpq", postgres_rule=True)
def check_postgres_version(got, want):
"""
Verify if the server version is a version accepted.
This function is called on the tests marked with something like::
@pytest.mark.pg(">= 12")
and skips the test if the server version doesn't match what expected.
"""
return check_version(got, want, "PostgreSQL", postgres_rule=True)
def check_version(got, want, whose_version, postgres_rule=True):
pred = VersionCheck.parse(want, postgres_rule=postgres_rule)
pred.whose = whose_version
return pred.get_skip_message(got)
class VersionCheck:
"""
Helper to compare a version number with a test spec.
"""
def __init__(
self,
*,
skip: bool = False,
op: Optional[str] = None,
version_tuple: Tuple[int, ...] = (),
whose: str = "(wanted)",
postgres_rule: bool = False,
):
self.skip = skip
self.op = op or "=="
self.version_tuple = version_tuple
self.whose = whose
# Treat 10.1 as 10.0.1
self.postgres_rule = postgres_rule
@classmethod
def parse(cls, spec: str, *, postgres_rule: bool = False) -> "VersionCheck":
# Parse a spec like "> 9.6", "skip < 21.2.0"
m = re.match(
r"""(?ix)
^\s* (skip|only)?
\s* (==|!=|>=|<=|>|<)?
\s* (?:(\d+)(?:\.(\d+)(?:\.(\d+))?)?)?
\s* $
""",
spec,
)
if m is None:
pytest.fail(f"bad wanted version spec: {spec}")
skip = (m.group(1) or "only").lower() == "skip"
op = m.group(2)
version_tuple = tuple(int(n) for n in m.groups()[2:] if n)
return cls(
skip=skip, op=op, version_tuple=version_tuple, postgres_rule=postgres_rule
)
def get_skip_message(self, version: Optional[int]) -> Optional[str]:
got_tuple = self._parse_int_version(version)
msg: Optional[str] = None
if self.skip:
if got_tuple:
if not self.version_tuple:
msg = f"skip on {self.whose}"
elif self._match_version(got_tuple):
msg = (
f"skip on {self.whose} {self.op}"
f" {'.'.join(map(str, self.version_tuple))}"
)
else:
if not got_tuple:
msg = f"only for {self.whose}"
elif not self._match_version(got_tuple):
if self.version_tuple:
msg = (
f"only for {self.whose} {self.op}"
f" {'.'.join(map(str, self.version_tuple))}"
)
else:
msg = f"only for {self.whose}"
return msg
_OP_NAMES = {">=": "ge", "<=": "le", ">": "gt", "<": "lt", "==": "eq", "!=": "ne"}
def _match_version(self, got_tuple: Tuple[int, ...]) -> bool:
if not self.version_tuple:
return True
version_tuple = self.version_tuple
if self.postgres_rule and version_tuple and version_tuple[0] >= 10:
assert len(version_tuple) <= 2
version_tuple = version_tuple[:1] + (0,) + version_tuple[1:]
op: Callable[[Tuple[int, ...], Tuple[int, ...]], bool]
op = getattr(operator, self._OP_NAMES[self.op])
return op(got_tuple, version_tuple)
def _parse_int_version(self, version: Optional[int]) -> Tuple[int, ...]:
if version is None:
return ()
version, ver_fix = divmod(version, 100)
ver_maj, ver_min = divmod(version, 100)
return (ver_maj, ver_min, ver_fix)
def gc_collect():
"""
gc.collect(), but more insisting.
"""
for i in range(3):
gc.collect()
NO_COUNT_TYPES: Tuple[type, ...] = ()
if sys.version_info[:2] == (3, 10):
# On my laptop there are occasional creations of a single one of these objects
# with empty content, which might be some Decimal caching.
# Keeping the guard as strict as possible, to be extended if other types
# or versions are necessary.
try:
from _contextvars import Context # type: ignore
except ImportError:
pass
else:
NO_COUNT_TYPES += (Context,)
def gc_count() -> int:
"""
len(gc.get_objects()), with subtleties.
"""
if not NO_COUNT_TYPES:
return len(gc.get_objects())
# Note: not using a list comprehension because it pollutes the objects list.
rv = 0
for obj in gc.get_objects():
if isinstance(obj, NO_COUNT_TYPES):
continue
rv += 1
return rv
async def alist(it):
return [i async for i in it]
|
