tests/test-demandimport.py
author Gregory Szorc <gregory.szorc@gmail.com>
Wed, 05 Sep 2018 09:36:31 -0700
changeset 39471 481db51c83e9
parent 38008 1d0610fdd63b
child 41519 dffd6a301570
permissions -rw-r--r--
merge with stable Includes an extra bump of the version number for parsers because the merge produces a new, distinct version of the code.
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from __future__ import absolute_import, print_function
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from mercurial import demandimport
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demandimport.enable()
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import os
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import subprocess
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import sys
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# Only run if demandimport is allowed
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if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
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                    'demandimport']):
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    sys.exit(80)
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if os.name != 'nt':
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    try:
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        import distutils.msvc9compiler
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        print('distutils.msvc9compiler needs to be an immediate '
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              'importerror on non-windows platforms')
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        distutils.msvc9compiler
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    except ImportError:
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        pass
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import re
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rsub = re.sub
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def f(obj):
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    l = repr(obj)
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    l = rsub("0x[0-9a-fA-F]+", "0x?", l)
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    l = rsub("from '.*'", "from '?'", l)
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    l = rsub("'<[a-z]*>'", "'<whatever>'", l)
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    return l
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demandimport.disable()
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os.environ['HGDEMANDIMPORT'] = 'disable'
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# this enable call should not actually enable demandimport!
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demandimport.enable()
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from mercurial import node
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print("node =", f(node))
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# now enable it for real
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del os.environ['HGDEMANDIMPORT']
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demandimport.enable()
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# Test access to special attributes through demandmod proxy
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from mercurial import error as errorproxy
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print("errorproxy =", f(errorproxy))
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print("errorproxy.__doc__ = %r"
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      % (' '.join(errorproxy.__doc__.split()[:3]) + ' ...'))
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print("errorproxy.__name__ = %r" % errorproxy.__name__)
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# __name__ must be accessible via __dict__ so the relative imports can be
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# resolved
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print("errorproxy.__dict__['__name__'] = %r" % errorproxy.__dict__['__name__'])
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print("errorproxy =", f(errorproxy))
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import os
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print("os =", f(os))
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print("os.system =", f(os.system))
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print("os =", f(os))
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from mercurial.utils import procutil
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print("procutil =", f(procutil))
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print("procutil.system =", f(procutil.system))
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print("procutil =", f(procutil))
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print("procutil.system =", f(procutil.system))
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from mercurial import hgweb
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print("hgweb =", f(hgweb))
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print("hgweb_mod =", f(hgweb.hgweb_mod))
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print("hgweb =", f(hgweb))
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import re as fred
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print("fred =", f(fred))
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import re as remod
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print("remod =", f(remod))
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import sys as re
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print("re =", f(re))
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print("fred =", f(fred))
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print("fred.sub =", f(fred.sub))
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print("fred =", f(fred))
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remod.escape  # use remod
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print("remod =", f(remod))
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print("re =", f(re))
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print("re.stderr =", f(re.stderr))
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print("re =", f(re))
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import contextlib
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print("contextlib =", f(contextlib))
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try:
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    from contextlib import unknownattr
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    print('no demandmod should be created for attribute of non-package '
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          'module:\ncontextlib.unknownattr =', f(unknownattr))
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except ImportError as inst:
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    print('contextlib.unknownattr = ImportError: %s'
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          % rsub(r"'", '', str(inst)))
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from mercurial import util
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# Unlike the import statement, __import__() function should not raise
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# ImportError even if fromlist has an unknown item
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# (see Python/import.c:import_module_level() and ensure_fromlist())
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contextlibimp = __import__('contextlib', globals(), locals(), ['unknownattr'])
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print("__import__('contextlib', ..., ['unknownattr']) =", f(contextlibimp))
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print("hasattr(contextlibimp, 'unknownattr') =",
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      util.safehasattr(contextlibimp, 'unknownattr'))