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2ee4128e9b
test.test_support.catch_warning is more full-featured and provides the same functionality. Since guard_warnings_filter was added in 2.6 there is no backwards-compatibility issues.
228 lines
7.4 KiB
Python
228 lines
7.4 KiB
Python
from test.test_support import TESTFN, run_unittest, catch_warning
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import unittest
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import os
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import random
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import sys
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import py_compile
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import 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 catch_warning():
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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_main(verbose=None):
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run_unittest(ImportTest)
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if __name__ == '__main__':
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test_main()
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