home *** CD-ROM | disk | FTP | other *** search
- import unittest
- import os
- import random
- import shutil
- import sys
- import py_compile
- import warnings
- from test.test_support import unlink, TESTFN, unload, run_unittest, check_warnings
-
-
- def remove_files(name):
- for f in (name + os.extsep + "py",
- name + os.extsep + "pyc",
- name + os.extsep + "pyo",
- name + os.extsep + "pyw",
- name + "$py.class"):
- if os.path.exists(f):
- os.remove(f)
-
-
- class ImportTest(unittest.TestCase):
-
- def testCaseSensitivity(self):
- # Brief digression to test that import is case-sensitive: if we got this
- # far, we know for sure that "random" exists.
- try:
- import RAnDoM
- except ImportError:
- pass
- else:
- self.fail("import of RAnDoM should have failed (case mismatch)")
-
- def testDoubleConst(self):
- # Another brief digression to test the accuracy of manifest float constants.
- from test import double_const # don't blink -- that *was* the test
-
- def testImport(self):
- def test_with_extension(ext):
- # ext normally ".py"; perhaps ".pyw"
- source = TESTFN + ext
- pyo = TESTFN + os.extsep + "pyo"
- if sys.platform.startswith('java'):
- pyc = TESTFN + "$py.class"
- else:
- pyc = TESTFN + os.extsep + "pyc"
-
- f = open(source, "w")
- print >> f, "# This tests Python's ability to import a", ext, "file."
- a = random.randrange(1000)
- b = random.randrange(1000)
- print >> f, "a =", a
- print >> f, "b =", b
- f.close()
-
- try:
- try:
- mod = __import__(TESTFN)
- except ImportError, err:
- self.fail("import from %s failed: %s" % (ext, err))
-
- self.assertEquals(mod.a, a,
- "module loaded (%s) but contents invalid" % mod)
- self.assertEquals(mod.b, b,
- "module loaded (%s) but contents invalid" % mod)
- finally:
- os.unlink(source)
-
- try:
- try:
- reload(mod)
- except ImportError, err:
- self.fail("import from .pyc/.pyo failed: %s" % err)
- finally:
- try:
- os.unlink(pyc)
- except OSError:
- pass
- try:
- os.unlink(pyo)
- except OSError:
- pass
- del sys.modules[TESTFN]
-
- sys.path.insert(0, os.curdir)
- try:
- test_with_extension(os.extsep + "py")
- if sys.platform.startswith("win"):
- for ext in ".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw":
- test_with_extension(ext)
- finally:
- del sys.path[0]
-
- def testImpModule(self):
- # Verify that the imp module can correctly load and find .py files
- import imp
- x = imp.find_module("os")
- os = imp.load_module("os", *x)
-
- def test_module_with_large_stack(self, module='longlist'):
- # create module w/list of 65000 elements to test bug #561858
- filename = module + os.extsep + 'py'
-
- # create a file with a list of 65000 elements
- f = open(filename, 'w+')
- f.write('d = [\n')
- for i in range(65000):
- f.write('"",\n')
- f.write(']')
- f.close()
-
- # compile & remove .py file, we only need .pyc (or .pyo)
- f = open(filename, 'r')
- py_compile.compile(filename)
- f.close()
- os.unlink(filename)
-
- # need to be able to load from current dir
- sys.path.append('')
-
- # this used to crash
- exec 'import ' + module
-
- # cleanup
- del sys.path[-1]
- for ext in 'pyc', 'pyo':
- fname = module + os.extsep + ext
- if os.path.exists(fname):
- os.unlink(fname)
-
- def test_failing_import_sticks(self):
- source = TESTFN + os.extsep + "py"
- f = open(source, "w")
- print >> f, "a = 1/0"
- f.close()
-
- # New in 2.4, we shouldn't be able to import that no matter how often
- # we try.
- sys.path.insert(0, os.curdir)
- try:
- for i in 1, 2, 3:
- try:
- mod = __import__(TESTFN)
- except ZeroDivisionError:
- if TESTFN in sys.modules:
- self.fail("damaged module in sys.modules on %i. try" % i)
- else:
- self.fail("was able to import a damaged module on %i. try" % i)
- finally:
- sys.path.pop(0)
- remove_files(TESTFN)
-
- def test_failing_reload(self):
- # A failing reload should leave the module object in sys.modules.
- source = TESTFN + os.extsep + "py"
- f = open(source, "w")
- print >> f, "a = 1"
- print >> f, "b = 2"
- f.close()
-
- sys.path.insert(0, os.curdir)
- try:
- mod = __import__(TESTFN)
- self.assert_(TESTFN in sys.modules, "expected module in sys.modules")
- self.assertEquals(mod.a, 1, "module has wrong attribute values")
- self.assertEquals(mod.b, 2, "module has wrong attribute values")
-
- # On WinXP, just replacing the .py file wasn't enough to
- # convince reload() to reparse it. Maybe the timestamp didn't
- # move enough. We force it to get reparsed by removing the
- # compiled file too.
- remove_files(TESTFN)
-
- # Now damage the module.
- f = open(source, "w")
- print >> f, "a = 10"
- print >> f, "b = 20//0"
- f.close()
-
- self.assertRaises(ZeroDivisionError, reload, mod)
-
- # But we still expect the module to be in sys.modules.
- mod = sys.modules.get(TESTFN)
- self.failIf(mod is None, "expected module to still be in sys.modules")
-
- # We should have replaced a w/ 10, but the old b value should
- # stick.
- self.assertEquals(mod.a, 10, "module has wrong attribute values")
- self.assertEquals(mod.b, 2, "module has wrong attribute values")
-
- finally:
- sys.path.pop(0)
- remove_files(TESTFN)
- if TESTFN in sys.modules:
- del sys.modules[TESTFN]
-
- def test_infinite_reload(self):
- # Bug #742342 reports that Python segfaults (infinite recursion in C)
- # when faced with self-recursive reload()ing.
-
- sys.path.insert(0, os.path.dirname(__file__))
- try:
- import infinite_reload
- finally:
- sys.path.pop(0)
-
- def test_import_name_binding(self):
- # import x.y.z binds x in the current namespace
- import test as x
- import test.test_support
- self.assert_(x is test, x.__name__)
- self.assert_(hasattr(test.test_support, "__file__"))
-
- # import x.y.z as w binds z as w
- import test.test_support as y
- self.assert_(y is test.test_support, y.__name__)
-
- def test_import_initless_directory_warning(self):
- with warnings.catch_warnings():
- # Just a random non-package directory we always expect to be
- # somewhere in sys.path...
- warnings.simplefilter('error', ImportWarning)
- self.assertRaises(ImportWarning, __import__, "site-packages")
-
- def test_importbyfilename(self):
- path = os.path.abspath(TESTFN)
- try:
- __import__(path)
- except ImportError, err:
- self.assertEqual("Import by filename is not supported.",
- err.args[0])
- else:
- self.fail("import by path didn't raise an exception")
-
- class PathsTests(unittest.TestCase):
- path = TESTFN
-
- def setUp(self):
- os.mkdir(self.path)
- self.syspath = sys.path[:]
-
- def tearDown(self):
- shutil.rmtree(self.path)
- sys.path = self.syspath
-
- # http://bugs.python.org/issue1293
- def test_trailing_slash(self):
- f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w')
- f.write("testdata = 'test_trailing_slash'")
- f.close()
- sys.path.append(self.path+'/')
- mod = __import__("test_trailing_slash")
- self.assertEqual(mod.testdata, 'test_trailing_slash')
- unload("test_trailing_slash")
-
- class RelativeImport(unittest.TestCase):
- def tearDown(self):
- try:
- del sys.modules["test.relimport"]
- except:
- pass
-
- def test_relimport_star(self):
- # This will import * from .test_import.
- from . import relimport
- self.assertTrue(hasattr(relimport, "RelativeImport"))
-
- def test_issue3221(self):
- def check_absolute():
- exec "from os import path" in ns
- def check_relative():
- exec "from . import relimport" in ns
- # Check both OK with __package__ and __name__ correct
- ns = dict(__package__='test', __name__='test.notarealmodule')
- check_absolute()
- check_relative()
- # Check both OK with only __name__ wrong
- ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
- check_absolute()
- check_relative()
- # Check relative fails with only __package__ wrong
- ns = dict(__package__='foo', __name__='test.notarealmodule')
- with check_warnings() as w:
- check_absolute()
- self.assert_('foo' in str(w.message))
- self.assertEqual(w.category, RuntimeWarning)
- self.assertRaises(SystemError, check_relative)
- # Check relative fails with __package__ and __name__ wrong
- ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
- with check_warnings() as w:
- check_absolute()
- self.assert_('foo' in str(w.message))
- self.assertEqual(w.category, RuntimeWarning)
- self.assertRaises(SystemError, check_relative)
- # Check both fail with package set to a non-string
- ns = dict(__package__=object())
- self.assertRaises(ValueError, check_absolute)
- self.assertRaises(ValueError, check_relative)
-
- def test_main(verbose=None):
- run_unittest(ImportTest, PathsTests, RelativeImport)
-
- if __name__ == '__main__':
- # test needs to be a package, so we can do relative import
- from test.test_import import test_main
- test_main()
-