/SiRFLive/PythonStdLib/test/test_os.py

# As a test suite for the os module, this is woefully inadequate, but this

# does add tests for a few functions which have been determined to be more

# portable than they had been thought to be.



import os

import unittest

import warnings

from test import test_support



warnings.filterwarnings("ignore", "tempnam", RuntimeWarning, __name__)

warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning, __name__)



class TemporaryFileTests(unittest.TestCase):

    def setUp(self):

        self.files = []

        os.mkdir(test_support.TESTFN)



    def tearDown(self):

        for name in self.files:

            os.unlink(name)

        os.rmdir(test_support.TESTFN)



    def check_tempfile(self, name):

        # make sure it doesn't already exist:

        self.failIf(os.path.exists(name),

                    "file already exists for temporary file")

        # make sure we can create the file

        open(name, "w")

        self.files.append(name)



    def test_tempnam(self):

        if not hasattr(os, "tempnam"):

            return

        warnings.filterwarnings("ignore", "tempnam", RuntimeWarning,

                                r"test_os$")

        self.check_tempfile(os.tempnam())



        name = os.tempnam(test_support.TESTFN)

        self.check_tempfile(name)



        name = os.tempnam(test_support.TESTFN, "pfx")

        self.assert_(os.path.basename(name)[:3] == "pfx")

        self.check_tempfile(name)



    def test_tmpfile(self):

        if not hasattr(os, "tmpfile"):

            return

        fp = os.tmpfile()

        fp.write("foobar")

        fp.seek(0,0)

        s = fp.read()

        fp.close()

        self.assert_(s == "foobar")



    def test_tmpnam(self):

        import sys

        if not hasattr(os, "tmpnam"):

            return

        warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning,

                                r"test_os$")

        name = os.tmpnam()

        if sys.platform in ("win32",):

            # The Windows tmpnam() seems useless.  From the MS docs:

            #

            #     The character string that tmpnam creates consists of

            #     the path prefix, defined by the entry P_tmpdir in the

            #     file STDIO.H, followed by a sequence consisting of the

            #     digit characters '0' through '9'; the numerical value

            #     of this string is in the range 1 - 65,535.  Changing the

            #     definitions of L_tmpnam or P_tmpdir in STDIO.H does not

            #     change the operation of tmpnam.

            #

            # The really bizarre part is that, at least under MSVC6,

            # P_tmpdir is "\\".  That is, the path returned refers to

            # the root of the current drive.  That's a terrible place to

            # put temp files, and, depending on privileges, the user

            # may not even be able to open a file in the root directory.

            self.failIf(os.path.exists(name),

                        "file already exists for temporary file")

        else:

            self.check_tempfile(name)



# Test attributes on return values from os.*stat* family.

class StatAttributeTests(unittest.TestCase):

    def setUp(self):

        os.mkdir(test_support.TESTFN)

        self.fname = os.path.join(test_support.TESTFN, "f1")

        f = open(self.fname, 'wb')

        f.write("ABC")

        f.close()



    def tearDown(self):

        os.unlink(self.fname)

        os.rmdir(test_support.TESTFN)



    def test_stat_attributes(self):

        if not hasattr(os, "stat"):

            return



        import stat

        result = os.stat(self.fname)



        # Make sure direct access works

        self.assertEquals(result[stat.ST_SIZE], 3)

        self.assertEquals(result.st_size, 3)



        import sys



        # Make sure all the attributes are there

        members = dir(result)

        for name in dir(stat):

            if name[:3] == 'ST_':

                attr = name.lower()

                self.assertEquals(getattr(result, attr),

                                  result[getattr(stat, name)])

                self.assert_(attr in members)



        try:

            result[200]

            self.fail("No exception thrown")

        except IndexError:

            pass



        # Make sure that assignment fails

        try:

            result.st_mode = 1

            self.fail("No exception thrown")

        except TypeError:

            pass



        try:

            result.st_rdev = 1

            self.fail("No exception thrown")

        except (AttributeError, TypeError):

            pass



        try:

            result.parrot = 1

            self.fail("No exception thrown")

        except AttributeError:

            pass



        # Use the stat_result constructor with a too-short tuple.

        try:

            result2 = os.stat_result((10,))

            self.fail("No exception thrown")

        except TypeError:

            pass



        # Use the constructr with a too-long tuple.

        try:

            result2 = os.stat_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))

        except TypeError:

            pass





    def test_statvfs_attributes(self):

        if not hasattr(os, "statvfs"):

            return



        import statvfs

        try:

            result = os.statvfs(self.fname)

        except OSError, e:

            # On AtheOS, glibc always returns ENOSYS

            import errno

            if e.errno == errno.ENOSYS:

                return



        # Make sure direct access works

        self.assertEquals(result.f_bfree, result[statvfs.F_BFREE])



        # Make sure all the attributes are there

        members = dir(result)

        for name in dir(statvfs):

            if name[:2] == 'F_':

                attr = name.lower()

                self.assertEquals(getattr(result, attr),

                                  result[getattr(statvfs, name)])

                self.assert_(attr in members)



        # Make sure that assignment really fails

        try:

            result.f_bfree = 1

            self.fail("No exception thrown")

        except TypeError:

            pass



        try:

            result.parrot = 1

            self.fail("No exception thrown")

        except AttributeError:

            pass



        # Use the constructor with a too-short tuple.

        try:

            result2 = os.statvfs_result((10,))

            self.fail("No exception thrown")

        except TypeError:

            pass



        # Use the constructr with a too-long tuple.

        try:

            result2 = os.statvfs_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))

        except TypeError:

            pass



from test import mapping_tests



class EnvironTests(mapping_tests.BasicTestMappingProtocol):

    """check that os.environ object conform to mapping protocol"""

    type2test = None

    def _reference(self):

        return {"KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3"}

    def _empty_mapping(self):

        os.environ.clear()

        return os.environ

    def setUp(self):

        self.__save = dict(os.environ)

        os.environ.clear()

    def tearDown(self):

        os.environ.clear()

        os.environ.update(self.__save)



class WalkTests(unittest.TestCase):

    """Tests for os.walk()."""



    def test_traversal(self):

        import os

        from os.path import join



        # Build:

        #     TESTFN/               a file kid and two directory kids

        #         tmp1

        #         SUB1/             a file kid and a directory kid

        #             tmp2

        #             SUB11/        no kids

        #         SUB2/             just a file kid

        #             tmp3

        sub1_path = join(test_support.TESTFN, "SUB1")

        sub11_path = join(sub1_path, "SUB11")

        sub2_path = join(test_support.TESTFN, "SUB2")

        tmp1_path = join(test_support.TESTFN, "tmp1")

        tmp2_path = join(sub1_path, "tmp2")

        tmp3_path = join(sub2_path, "tmp3")



        # Create stuff.

        os.makedirs(sub11_path)

        os.makedirs(sub2_path)

        for path in tmp1_path, tmp2_path, tmp3_path:

            f = file(path, "w")

            f.write("I'm " + path + " and proud of it.  Blame test_os.\n")

            f.close()



        # Walk top-down.

        all = list(os.walk(test_support.TESTFN))

        self.assertEqual(len(all), 4)

        # We can't know which order SUB1 and SUB2 will appear in.

        # Not flipped:  TESTFN, SUB1, SUB11, SUB2

        #     flipped:  TESTFN, SUB2, SUB1, SUB11

        flipped = all[0][1][0] != "SUB1"

        all[0][1].sort()

        self.assertEqual(all[0], (test_support.TESTFN, ["SUB1", "SUB2"], ["tmp1"]))

        self.assertEqual(all[1 + flipped], (sub1_path, ["SUB11"], ["tmp2"]))

        self.assertEqual(all[2 + flipped], (sub11_path, [], []))

        self.assertEqual(all[3 - 2 * flipped], (sub2_path, [], ["tmp3"]))



        # Prune the search.

        all = []

        for root, dirs, files in os.walk(test_support.TESTFN):

            all.append((root, dirs, files))

            # Don't descend into SUB1.

            if 'SUB1' in dirs:

                # Note that this also mutates the dirs we appended to all!

                dirs.remove('SUB1')

        self.assertEqual(len(all), 2)

        self.assertEqual(all[0], (test_support.TESTFN, ["SUB2"], ["tmp1"]))

        self.assertEqual(all[1], (sub2_path, [], ["tmp3"]))



        # Walk bottom-up.

        all = list(os.walk(test_support.TESTFN, topdown=False))

        self.assertEqual(len(all), 4)

        # We can't know which order SUB1 and SUB2 will appear in.

        # Not flipped:  SUB11, SUB1, SUB2, TESTFN

        #     flipped:  SUB2, SUB11, SUB1, TESTFN

        flipped = all[3][1][0] != "SUB1"

        all[3][1].sort()

        self.assertEqual(all[3], (test_support.TESTFN, ["SUB1", "SUB2"], ["tmp1"]))

        self.assertEqual(all[flipped], (sub11_path, [], []))

        self.assertEqual(all[flipped + 1], (sub1_path, ["SUB11"], ["tmp2"]))

        self.assertEqual(all[2 - 2 * flipped], (sub2_path, [], ["tmp3"]))



        # Tear everything down.  This is a decent use for bottom-up on

        # Windows, which doesn't have a recursive delete command.  The

        # (not so) subtlety is that rmdir will fail unless the dir's

        # kids are removed first, so bottom up is essential.

        for root, dirs, files in os.walk(test_support.TESTFN, topdown=False):

            for name in files:

                os.remove(join(root, name))

            for name in dirs:

                os.rmdir(join(root, name))

        os.rmdir(test_support.TESTFN)



class MakedirTests (unittest.TestCase):

    def setUp(self):

        os.mkdir(test_support.TESTFN)



    def test_makedir(self):

        base = test_support.TESTFN

        path = os.path.join(base, 'dir1', 'dir2', 'dir3')

        os.makedirs(path)             # Should work

        path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4')

        os.makedirs(path)



        # Try paths with a '.' in them

        self.failUnlessRaises(OSError, os.makedirs, os.curdir)

        path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4', 'dir5', os.curdir)

        os.makedirs(path)

        path = os.path.join(base, 'dir1', os.curdir, 'dir2', 'dir3', 'dir4',

                            'dir5', 'dir6')

        os.makedirs(path)









    def tearDown(self):

        path = os.path.join(test_support.TESTFN, 'dir1', 'dir2', 'dir3',

                            'dir4', 'dir5', 'dir6')

        # If the tests failed, the bottom-most directory ('../dir6')

        # may not have been created, so we look for the outermost directory

        # that exists.

        while not os.path.exists(path) and path != test_support.TESTFN:

            path = os.path.dirname(path)



        os.removedirs(path)



class DevNullTests (unittest.TestCase):

    def test_devnull(self):

        f = file(os.devnull, 'w')

        f.write('hello')

        f.close()

        f = file(os.devnull, 'r')

        self.assertEqual(f.read(), '')

        f.close()



class URandomTests (unittest.TestCase):

    def test_urandom(self):

        try:

            self.assertEqual(len(os.urandom(1)), 1)

            self.assertEqual(len(os.urandom(10)), 10)

            self.assertEqual(len(os.urandom(100)), 100)

            self.assertEqual(len(os.urandom(1000)), 1000)

        except NotImplementedError:

            pass



def test_main():

    test_support.run_unittest(

        TemporaryFileTests,

        StatAttributeTests,

        EnvironTests,

        WalkTests,

        MakedirTests,

        DevNullTests,

        URandomTests

    )



if __name__ == "__main__":

    test_main()