lib-python.2.5.test.test_zipimport.py Maven / Gradle / Ivy

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import sys
import os
import marshal
import imp
import struct
import time
import unittest

import zlib # implied prerequisite
from zipfile import ZipFile, ZipInfo, ZIP_STORED, ZIP_DEFLATED
from test import test_support
from test.test_importhooks import ImportHooksBaseTestCase, test_src, test_co

import zipimport
import linecache
import doctest
import inspect
import StringIO
from traceback import extract_tb, extract_stack, print_tb
raise_src = 'def do_raise(): raise TypeError\n'

# so we only run testAFakeZlib once if this test is run repeatedly
# which happens when we look for ref leaks
test_imported = False


def make_pyc(co, mtime):
    data = marshal.dumps(co)
    if type(mtime) is type(0.0):
        # Mac mtimes need a bit of special casing
        if mtime < 0x7fffffff:
            mtime = int(mtime)
        else:
            mtime = int(-0x100000000L + long(mtime))
    pyc = imp.get_magic() + struct.pack("", "exec"), NOW)
        files = {TESTMOD + pyc_ext: (NOW, pyc),
                 "some.data": (NOW, "some data")}
        self.doTest(pyc_ext, files, TESTMOD)

    def testImport_WithStuff(self):
        # try importing from a zipfile which contains additional
        # stuff at the beginning of the file
        files = {TESTMOD + ".py": (NOW, test_src)}
        self.doTest(".py", files, TESTMOD,
                    stuff="Some Stuff"*31)

    def assertModuleSource(self, module):
        self.assertEqual(inspect.getsource(module), test_src)

    def testGetSource(self):
        files = {TESTMOD + ".py": (NOW, test_src)}
        self.doTest(".py", files, TESTMOD, call=self.assertModuleSource)

    def testGetCompiledSource(self):
        pyc = make_pyc(compile(test_src, "", "exec"), NOW)
        files = {TESTMOD + ".py": (NOW, test_src),
                 TESTMOD + pyc_ext: (NOW, pyc)}
        self.doTest(pyc_ext, files, TESTMOD, call=self.assertModuleSource)

    def runDoctest(self, callback):
        files = {TESTMOD + ".py": (NOW, test_src),
                 "xyz.txt": (NOW, ">>> log.append(True)\n")}
        self.doTest(".py", files, TESTMOD, call=callback)

    def doDoctestFile(self, module):
        log = []
        old_master, doctest.master = doctest.master, None
        try:
            doctest.testfile(
                'xyz.txt', package=module, module_relative=True,
                globs=locals()
            )
        finally:
            doctest.master = old_master
        self.assertEqual(log,[True])

    def testDoctestFile(self):
        self.runDoctest(self.doDoctestFile)

    def doDoctestSuite(self, module):
        log = []
        doctest.DocFileTest(
            'xyz.txt', package=module, module_relative=True,
            globs=locals()
        ).run()
        self.assertEqual(log,[True])

    def testDoctestSuite(self):
        self.runDoctest(self.doDoctestSuite)


    def doTraceback(self, module):
        try:
            module.do_raise()
        except:
            tb = sys.exc_info()[2].tb_next

            f,lno,n,line = extract_tb(tb, 1)[0]
            self.assertEqual(line, raise_src.strip())

            f,lno,n,line = extract_stack(tb.tb_frame, 1)[0]
            self.assertEqual(line, raise_src.strip())

            s = StringIO.StringIO()
            print_tb(tb, 1, s)
            self.failUnless(s.getvalue().endswith(raise_src))
        else:
            raise AssertionError("This ought to be impossible")

    def testTraceback(self):
        files = {TESTMOD + ".py": (NOW, raise_src)}
        self.doTest(None, files, TESTMOD, call=self.doTraceback)


class CompressedZipImportTestCase(UncompressedZipImportTestCase):
    compression = ZIP_DEFLATED


class BadFileZipImportTestCase(unittest.TestCase):
    def assertZipFailure(self, filename):
        self.assertRaises(zipimport.ZipImportError,
                          zipimport.zipimporter, filename)

    def testNoFile(self):
        self.assertZipFailure('AdfjdkFJKDFJjdklfjs')

    def testEmptyFilename(self):
        self.assertZipFailure('')

    def testBadArgs(self):
        self.assertRaises(TypeError, zipimport.zipimporter, None)
        self.assertRaises(TypeError, zipimport.zipimporter, TESTMOD, kwd=None)

    def testFilenameTooLong(self):
        self.assertZipFailure('A' * 33000)

    def testEmptyFile(self):
        test_support.unlink(TESTMOD)
        open(TESTMOD, 'w+').close()
        self.assertZipFailure(TESTMOD)

    def testFileUnreadable(self):
        test_support.unlink(TESTMOD)
        fd = os.open(TESTMOD, os.O_CREAT, 000)
        try:
            os.close(fd)
            self.assertZipFailure(TESTMOD)
        finally:
            # If we leave "the read-only bit" set on Windows, nothing can
            # delete TESTMOD, and later tests suffer bogus failures.
            os.chmod(TESTMOD, 0666)
            test_support.unlink(TESTMOD)

    def testNotZipFile(self):
        test_support.unlink(TESTMOD)
        fp = open(TESTMOD, 'w+')
        fp.write('a' * 22)
        fp.close()
        self.assertZipFailure(TESTMOD)

    # XXX: disabled until this works on Big-endian machines
    def _testBogusZipFile(self):
        test_support.unlink(TESTMOD)
        fp = open(TESTMOD, 'w+')
        fp.write(struct.pack('=I', 0x06054B50))
        fp.write('a' * 18)
        fp.close()
        z = zipimport.zipimporter(TESTMOD)

        try:
            self.assertRaises(TypeError, z.find_module, None)
            self.assertRaises(TypeError, z.load_module, None)
            self.assertRaises(TypeError, z.is_package, None)
            self.assertRaises(TypeError, z.get_code, None)
            self.assertRaises(TypeError, z.get_data, None)
            self.assertRaises(TypeError, z.get_source, None)

            error = zipimport.ZipImportError
            self.assertEqual(z.find_module('abc'), None)

            self.assertRaises(error, z.load_module, 'abc')
            self.assertRaises(error, z.get_code, 'abc')
            self.assertRaises(IOError, z.get_data, 'abc')
            self.assertRaises(error, z.get_source, 'abc')
            self.assertRaises(error, z.is_package, 'abc')
        finally:
            zipimport._zip_directory_cache.clear()


def cleanup():
    # this is necessary if test is run repeated (like when finding leaks)
    global test_imported
    if test_imported:
        zipimport._zip_directory_cache.clear()
        if hasattr(UncompressedZipImportTestCase, 'testAFakeZlib'):
            delattr(UncompressedZipImportTestCase, 'testAFakeZlib')
        if hasattr(CompressedZipImportTestCase, 'testAFakeZlib'):
            delattr(CompressedZipImportTestCase, 'testAFakeZlib')
    test_imported = True

def test_main():
    cleanup()
    try:
        test_support.run_unittest(
              UncompressedZipImportTestCase,
              CompressedZipImportTestCase,
              BadFileZipImportTestCase,
            )
    finally:
        test_support.unlink(TESTMOD)

if __name__ == "__main__":
    test_main()