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https://github.com/python/cpython.git
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e96d4ea4e2
an existing .py counterpart, override the co_filename attributes of all code objects if the original filename is obsolete (which can happen if the file has been renamed, moved, or if it is accessed through different paths). Patch by Ziga Seilnacht and Jean-Paul Calderone.
397 lines
14 KiB
Python
397 lines
14 KiB
Python
import unittest
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import os
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import random
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import shutil
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import sys
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import py_compile
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import warnings
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import marshal
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from test.test_support import unlink, TESTFN, unload, run_unittest, check_warnings
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def remove_files(name):
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for f in (name + os.extsep + "py",
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name + os.extsep + "pyc",
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name + os.extsep + "pyo",
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name + os.extsep + "pyw",
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name + "$py.class"):
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if os.path.exists(f):
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os.remove(f)
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class ImportTest(unittest.TestCase):
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def testCaseSensitivity(self):
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# Brief digression to test that import is case-sensitive: if we got this
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# far, we know for sure that "random" exists.
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try:
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import RAnDoM
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except ImportError:
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pass
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else:
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self.fail("import of RAnDoM should have failed (case mismatch)")
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def testDoubleConst(self):
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# Another brief digression to test the accuracy of manifest float constants.
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from test import double_const # don't blink -- that *was* the test
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def testImport(self):
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def test_with_extension(ext):
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# ext normally ".py"; perhaps ".pyw"
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source = TESTFN + ext
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pyo = TESTFN + os.extsep + "pyo"
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if sys.platform.startswith('java'):
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pyc = TESTFN + "$py.class"
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else:
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pyc = TESTFN + os.extsep + "pyc"
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f = open(source, "w")
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print >> f, "# This tests Python's ability to import a", ext, "file."
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a = random.randrange(1000)
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b = random.randrange(1000)
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print >> f, "a =", a
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print >> f, "b =", b
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f.close()
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try:
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try:
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mod = __import__(TESTFN)
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except ImportError, err:
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self.fail("import from %s failed: %s" % (ext, err))
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self.assertEquals(mod.a, a,
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"module loaded (%s) but contents invalid" % mod)
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self.assertEquals(mod.b, b,
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"module loaded (%s) but contents invalid" % mod)
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finally:
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os.unlink(source)
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try:
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try:
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reload(mod)
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except ImportError, err:
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self.fail("import from .pyc/.pyo failed: %s" % err)
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finally:
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try:
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os.unlink(pyc)
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except OSError:
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pass
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try:
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os.unlink(pyo)
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except OSError:
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pass
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del sys.modules[TESTFN]
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sys.path.insert(0, os.curdir)
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try:
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test_with_extension(os.extsep + "py")
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if sys.platform.startswith("win"):
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for ext in ".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw":
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test_with_extension(ext)
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finally:
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del sys.path[0]
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def testImpModule(self):
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# Verify that the imp module can correctly load and find .py files
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import imp
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x = imp.find_module("os")
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os = imp.load_module("os", *x)
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def test_module_with_large_stack(self, module='longlist'):
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# create module w/list of 65000 elements to test bug #561858
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filename = module + os.extsep + 'py'
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# create a file with a list of 65000 elements
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f = open(filename, 'w+')
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f.write('d = [\n')
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for i in range(65000):
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f.write('"",\n')
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f.write(']')
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f.close()
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# compile & remove .py file, we only need .pyc (or .pyo)
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f = open(filename, 'r')
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py_compile.compile(filename)
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f.close()
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os.unlink(filename)
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# need to be able to load from current dir
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sys.path.append('')
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# this used to crash
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exec 'import ' + module
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# cleanup
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del sys.path[-1]
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for ext in 'pyc', 'pyo':
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fname = module + os.extsep + ext
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if os.path.exists(fname):
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os.unlink(fname)
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def test_failing_import_sticks(self):
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source = TESTFN + os.extsep + "py"
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f = open(source, "w")
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print >> f, "a = 1/0"
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f.close()
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# New in 2.4, we shouldn't be able to import that no matter how often
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# we try.
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sys.path.insert(0, os.curdir)
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try:
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for i in 1, 2, 3:
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try:
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mod = __import__(TESTFN)
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except ZeroDivisionError:
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if TESTFN in sys.modules:
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self.fail("damaged module in sys.modules on %i. try" % i)
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else:
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self.fail("was able to import a damaged module on %i. try" % i)
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finally:
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sys.path.pop(0)
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remove_files(TESTFN)
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def test_failing_reload(self):
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# A failing reload should leave the module object in sys.modules.
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source = TESTFN + os.extsep + "py"
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f = open(source, "w")
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print >> f, "a = 1"
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print >> f, "b = 2"
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f.close()
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sys.path.insert(0, os.curdir)
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try:
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mod = __import__(TESTFN)
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self.assert_(TESTFN in sys.modules, "expected module in sys.modules")
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self.assertEquals(mod.a, 1, "module has wrong attribute values")
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self.assertEquals(mod.b, 2, "module has wrong attribute values")
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# On WinXP, just replacing the .py file wasn't enough to
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# convince reload() to reparse it. Maybe the timestamp didn't
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# move enough. We force it to get reparsed by removing the
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# compiled file too.
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remove_files(TESTFN)
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# Now damage the module.
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f = open(source, "w")
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print >> f, "a = 10"
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print >> f, "b = 20//0"
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f.close()
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self.assertRaises(ZeroDivisionError, reload, mod)
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# But we still expect the module to be in sys.modules.
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mod = sys.modules.get(TESTFN)
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self.failIf(mod is None, "expected module to still be in sys.modules")
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# We should have replaced a w/ 10, but the old b value should
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# stick.
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self.assertEquals(mod.a, 10, "module has wrong attribute values")
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self.assertEquals(mod.b, 2, "module has wrong attribute values")
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finally:
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sys.path.pop(0)
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remove_files(TESTFN)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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def test_infinite_reload(self):
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# Bug #742342 reports that Python segfaults (infinite recursion in C)
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# when faced with self-recursive reload()ing.
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sys.path.insert(0, os.path.dirname(__file__))
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try:
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import infinite_reload
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finally:
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sys.path.pop(0)
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def test_import_name_binding(self):
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# import x.y.z binds x in the current namespace
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import test as x
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import test.test_support
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self.assert_(x is test, x.__name__)
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self.assert_(hasattr(test.test_support, "__file__"))
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# import x.y.z as w binds z as w
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import test.test_support as y
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self.assert_(y is test.test_support, y.__name__)
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def test_import_initless_directory_warning(self):
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with warnings.catch_warnings():
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# Just a random non-package directory we always expect to be
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# somewhere in sys.path...
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warnings.simplefilter('error', ImportWarning)
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self.assertRaises(ImportWarning, __import__, "site-packages")
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def test_importbyfilename(self):
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path = os.path.abspath(TESTFN)
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try:
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__import__(path)
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except ImportError, err:
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self.assertEqual("Import by filename is not supported.",
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err.args[0])
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else:
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self.fail("import by path didn't raise an exception")
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class TestPycRewriting(unittest.TestCase):
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# Test that the `co_filename` attribute on code objects always points
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# to the right file, even when various things happen (e.g. both the .py
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# and the .pyc file are renamed).
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module_name = "unlikely_module_name"
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module_source = """
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import sys
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code_filename = sys._getframe().f_code.co_filename
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module_filename = __file__
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constant = 1
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def func():
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pass
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func_filename = func.func_code.co_filename
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"""
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dir_name = os.path.abspath(TESTFN)
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file_name = os.path.join(dir_name, module_name) + os.extsep + "py"
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compiled_name = file_name + ("c" if __debug__ else "o")
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def setUp(self):
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self.sys_path = sys.path[:]
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self.orig_module = sys.modules.pop(self.module_name, None)
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os.mkdir(self.dir_name)
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with open(self.file_name, "w") as f:
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f.write(self.module_source)
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sys.path.insert(0, self.dir_name)
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def tearDown(self):
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sys.path[:] = self.sys_path
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if self.orig_module is not None:
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sys.modules[self.module_name] = self.orig_module
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else:
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del sys.modules[self.module_name]
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for file_name in self.file_name, self.compiled_name:
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if os.path.exists(file_name):
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os.remove(file_name)
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if os.path.exists(self.dir_name):
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os.rmdir(self.dir_name)
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def import_module(self):
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ns = globals()
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__import__(self.module_name, ns, ns)
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return sys.modules[self.module_name]
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def test_basics(self):
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.file_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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del sys.modules[self.module_name]
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.compiled_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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def test_incorrect_code_name(self):
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py_compile.compile(self.file_name, dfile="another_module.py")
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.compiled_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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def test_module_without_source(self):
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target = "another_module.py"
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py_compile.compile(self.file_name, dfile=target)
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os.remove(self.file_name)
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.compiled_name)
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self.assertEqual(mod.code_filename, target)
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self.assertEqual(mod.func_filename, target)
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def test_foreign_code(self):
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py_compile.compile(self.file_name)
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with open(self.compiled_name, "rb") as f:
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header = f.read(8)
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code = marshal.load(f)
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constants = list(code.co_consts)
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foreign_code = test_main.func_code
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pos = constants.index(1)
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constants[pos] = foreign_code
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code = type(code)(code.co_argcount, code.co_nlocals, code.co_stacksize,
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code.co_flags, code.co_code, tuple(constants),
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code.co_names, code.co_varnames, code.co_filename,
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code.co_name, code.co_firstlineno, code.co_lnotab,
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code.co_freevars, code.co_cellvars)
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with open(self.compiled_name, "wb") as f:
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f.write(header)
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marshal.dump(code, f)
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mod = self.import_module()
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self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
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class PathsTests(unittest.TestCase):
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path = TESTFN
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def setUp(self):
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os.mkdir(self.path)
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self.syspath = sys.path[:]
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def tearDown(self):
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shutil.rmtree(self.path)
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sys.path = self.syspath
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# http://bugs.python.org/issue1293
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def test_trailing_slash(self):
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f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w')
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f.write("testdata = 'test_trailing_slash'")
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f.close()
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sys.path.append(self.path+'/')
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mod = __import__("test_trailing_slash")
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self.assertEqual(mod.testdata, 'test_trailing_slash')
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unload("test_trailing_slash")
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class RelativeImport(unittest.TestCase):
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def tearDown(self):
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try:
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del sys.modules["test.relimport"]
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except:
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pass
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def test_relimport_star(self):
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# This will import * from .test_import.
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from . import relimport
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self.assertTrue(hasattr(relimport, "RelativeImport"))
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def test_issue3221(self):
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def check_absolute():
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exec "from os import path" in ns
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def check_relative():
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exec "from . import relimport" in ns
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# Check both OK with __package__ and __name__ correct
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ns = dict(__package__='test', __name__='test.notarealmodule')
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check_absolute()
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check_relative()
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# Check both OK with only __name__ wrong
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ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
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check_absolute()
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check_relative()
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# Check relative fails with only __package__ wrong
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ns = dict(__package__='foo', __name__='test.notarealmodule')
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with check_warnings() as w:
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check_absolute()
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self.assert_('foo' in str(w.message))
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self.assertEqual(w.category, RuntimeWarning)
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self.assertRaises(SystemError, check_relative)
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# Check relative fails with __package__ and __name__ wrong
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ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
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with check_warnings() as w:
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check_absolute()
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self.assert_('foo' in str(w.message))
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self.assertEqual(w.category, RuntimeWarning)
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self.assertRaises(SystemError, check_relative)
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# Check both fail with package set to a non-string
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ns = dict(__package__=object())
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self.assertRaises(ValueError, check_absolute)
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self.assertRaises(ValueError, check_relative)
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def test_main(verbose=None):
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run_unittest(ImportTest, TestPycRewriting, PathsTests, RelativeImport)
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if __name__ == '__main__':
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# test needs to be a package, so we can do relative import
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from test.test_import import test_main
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test_main()
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