view tests/test-demandimport.py @ 52230:7a568296296e stable

windows: simply rely on the PATH adjustment to find python.exe in tests

The shell script under a `.exe` name confused Windows outside MSYS and give us
the following error:

    […]/python.exe is not compatible with the version of Windows you're running. Check your computer's system information and then contact the software publisher.

This is necessary to get the wheel variant of the test run to work properly.

from mercurial import demandimport

demandimport.enable()

import os
import subprocess
import sys
import types

# Don't import pycompat because it has too many side-effects.
ispy311 = (sys.version_info.major, sys.version_info.minor) >= (3, 11)

# Only run if demandimport is allowed
if subprocess.call(
    [os.environ['PYTHON'], '%s/hghave' % os.environ['TESTDIR'], 'demandimport']
):
    sys.exit(80)

# We rely on assert, which gets optimized out.
if sys.flags.optimize:
    sys.exit(80)

# The demand importer doesn't work on Python 3.5.
if sys.version_info[0:2] == (3, 5):
    sys.exit(80)

from importlib.util import _LazyModule

try:
    from importlib.util import _Module as moduletype
except ImportError:
    moduletype = types.ModuleType

import re

rsub = re.sub


def f(obj):
    l = repr(obj)
    l = rsub("0x[0-9a-fA-F]+", "0x?", l)
    l = rsub("from '.*'", "from '?'", l)
    l = rsub("'<[a-z]*>'", "'<whatever>'", l)
    return l


demandimport.disable()
os.environ['HGDEMANDIMPORT'] = 'disable'
# this enable call should not actually enable demandimport!
demandimport.enable()
from mercurial import node

# We use assert instead of a unittest test case because having imports inside
# functions changes behavior of the demand importer.
assert not isinstance(node, _LazyModule)

# now enable it for real
del os.environ['HGDEMANDIMPORT']
demandimport.enable()

# Test access to special attributes through demandmod proxy
assert 'mercurial.error' not in sys.modules
from mercurial import error as errorproxy

assert isinstance(errorproxy, _LazyModule)
assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy)

doc = ' '.join(errorproxy.__doc__.split()[:3])
assert doc == 'Mercurial exceptions. This', doc
assert errorproxy.__name__ == 'mercurial.error', errorproxy.__name__

# __name__ must be accessible via __dict__ so the relative imports can be
# resolved
name = errorproxy.__dict__['__name__']
assert name == 'mercurial.error', name

assert not isinstance(errorproxy, _LazyModule)
assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy)

import os

assert not isinstance(os, _LazyModule)
if ispy311:
    assert f(os) == "<module 'os' (frozen)>", f(os)
else:
    assert f(os) == "<module 'os' from '?'>", f(os)

assert f(os.system) == '<built-in function system>', f(os.system)
if ispy311:
    assert f(os) == "<module 'os' (frozen)>", f(os)
else:
    assert f(os) == "<module 'os' from '?'>", f(os)

assert 'mercurial.utils.procutil' not in sys.modules
from mercurial.utils import procutil

assert isinstance(procutil, _LazyModule)
assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f(
    procutil
)

assert f(procutil.system) == '<function system at 0x?>', f(procutil.system)
assert procutil.__class__ == moduletype, procutil.__class__
assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f(
    procutil
)
assert f(procutil.system) == '<function system at 0x?>', f(procutil.system)

assert 'mercurial.hgweb' not in sys.modules
from mercurial import hgweb

assert isinstance(hgweb, _LazyModule)
assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb)
assert isinstance(hgweb.hgweb_mod, _LazyModule)
assert f(hgweb.hgweb_mod) == "<module 'mercurial.hgweb.hgweb_mod' from '?'>", f(
    hgweb.hgweb_mod
)

assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb)

import re as fred

assert not isinstance(fred, _LazyModule)
assert f(fred) == "<module 're' from '?'>"

import re as remod

assert not isinstance(remod, _LazyModule)
assert f(remod) == "<module 're' from '?'>"

import sys as re

assert not isinstance(re, _LazyModule)
assert f(re) == "<module 'sys' (built-in)>"

assert not isinstance(fred, _LazyModule)
assert f(fred) == "<module 're' from '?'>", f(fred)

assert f(fred.sub) == '<function sub at 0x?>', f(fred.sub)

assert not isinstance(fred, _LazyModule)
assert f(fred) == "<module 're' from '?'>", f(fred)

remod.escape  # use remod
assert f(remod) == "<module 're' from '?'>", f(remod)

assert not isinstance(re, _LazyModule)
assert f(re) == "<module 'sys' (built-in)>"
assert f(type(re.stderr)) == "<class '_io.TextIOWrapper'>", f(type(re.stderr))
assert f(re) == "<module 'sys' (built-in)>"

assert 'wsgiref' not in sys.modules
import wsgiref

assert isinstance(wsgiref, _LazyModule)
assert f(wsgiref) == "<module 'wsgiref' from '?'>"

try:
    from wsgiref import unknownattr

    assert False, (
        'no demandmod should be created for attribute of non-package '
        'module:\nwsgiref.unknownattr = %s' % f(unknownattr)
    )
except ImportError as inst:
    assert rsub(r"'", '', str(inst)).startswith(
        'cannot import name unknownattr'
    )

# Unlike the import statement, __import__() function should not raise
# ImportError even if fromlist has an unknown item
# (see Python/import.c:import_module_level() and ensure_fromlist())
assert 'ftplib' not in sys.modules
zipfileimp = __import__('ftplib', globals(), locals(), ['unknownattr'])
assert f(zipfileimp) == "<module 'ftplib' from '?'>", f(zipfileimp)
assert not hasattr(zipfileimp, 'unknownattr')


# test deactivation for issue6725
del sys.modules['wsgiref']
with demandimport.deactivated():
    import wsgiref
assert wsgiref.__loader__ == wsgiref.__spec__.loader
assert wsgiref.__loader__.get_resource_reader