Mercurial > hg
view tests/test-demandimport.py @ 50706:0452af304808
stream-clone: add a v3 version of the protocol
This new version is less rigid regarding the extract number of files and number
of bytes to be actually transfered, it also lays the groundwork for other
improvements.
The format stays experimental, but this is an interesting base to build upon.
author | Arseniy Alekseyev <aalekseyev@janestreet.com> |
---|---|
date | Thu, 01 Jun 2023 17:39:22 +0100 |
parents | 1bd33932713d |
children | d718eddf01d9 |
line wrap: on
line source
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 if os.name != 'nt': try: import distutils.msvc9compiler print( 'distutils.msvc9compiler needs to be an immediate ' 'importerror on non-windows platforms' ) distutils.msvc9compiler except ImportError: pass 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 'telnetlib' not in sys.modules import telnetlib assert isinstance(telnetlib, _LazyModule) assert f(telnetlib) == "<module 'telnetlib' from '?'>" try: from telnetlib import unknownattr assert False, ( 'no demandmod should be created for attribute of non-package ' 'module:\ntelnetlib.unknownattr = %s' % f(unknownattr) ) except ImportError as inst: assert rsub(r"'", '', str(inst)).startswith( 'cannot import name unknownattr' ) from mercurial import util # 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 util.safehasattr(zipfileimp, 'unknownattr') # test deactivation for issue6725 del sys.modules['telnetlib'] with demandimport.deactivated(): import telnetlib assert telnetlib.__loader__ == telnetlib.__spec__.loader assert telnetlib.__loader__.get_resource_reader