# Copyright (C) 2003 Python Software Foundation

import unittest

import shutil

import tempfile

import sys

import stat

import os

import os.path

from test import test_support

from test.test_support import TESTFN

class TestShutil(unittest.TestCase):

    def test_rmtree_errors(self):

        # filename is guaranteed not to exist

        filename = tempfile.mktemp()

        self.assertRaises(OSError, shutil.rmtree, filename)

    # See bug #1071513 for why we don't run this on cygwin

    # and bug #1076467 for why we don't run this as root.

    if (hasattr(os, 'chmod') and sys.platform[:6] != 'cygwin'

        and not (hasattr(os, 'geteuid') and os.geteuid() == 0)):

        def test_on_error(self):

            self.errorState = 0

            os.mkdir(TESTFN)

            self.childpath = os.path.join(TESTFN, 'a')

            f = open(self.childpath, 'w')

            f.close()

            old_dir_mode = os.stat(TESTFN).st_mode

            old_child_mode = os.stat(self.childpath).st_mode

            # Make unwritable.

            os.chmod(self.childpath, stat.S_IREAD)

            os.chmod(TESTFN, stat.S_IREAD)

            shutil.rmtree(TESTFN, onerror=self.check_args_to_onerror)

            # Test whether onerror has actually been called.

            self.assertEqual(self.errorState, 2,

                             "Expected call to onerror function did not happen.")

            # Make writable again.

            os.chmod(TESTFN, old_dir_mode)

            os.chmod(self.childpath, old_child_mode)

            # Clean up.

            shutil.rmtree(TESTFN)

    def check_args_to_onerror(self, func, arg, exc):

        if self.errorState == 0:

            self.assertEqual(func, os.remove)

            self.assertEqual(arg, self.childpath)

            self.failUnless(issubclass(exc[0], OSError))

            self.errorState = 1

        else:

            self.assertEqual(func, os.rmdir)

            self.assertEqual(arg, TESTFN)

            self.failUnless(issubclass(exc[0], OSError))

            self.errorState = 2

    def test_rmtree_dont_delete_file(self):

        # When called on a file instead of a directory, don't delete it.

        handle, path = tempfile.mkstemp()

        os.fdopen(handle).close()

        self.assertRaises(OSError, shutil.rmtree, path)

        os.remove(path)

    def test_dont_move_dir_in_itself(self):

        src_dir = tempfile.mkdtemp()

        try:

            dst = os.path.join(src_dir, 'foo')

            self.assertRaises(shutil.Error, shutil.move, src_dir, dst)

        finally:

            try:

                os.rmdir(src_dir)

            except:

                pass

    def test_copytree_simple(self):

        def write_data(path, data):

            f = open(path, "w")

            f.write(data)

            f.close()

        def read_data(path):

            f = open(path)

            data = f.read()

            f.close()

            return data

        src_dir = tempfile.mkdtemp()

        dst_dir = os.path.join(tempfile.mkdtemp(), 'destination')

        write_data(os.path.join(src_dir, 'test.txt'), '123')

        os.mkdir(os.path.join(src_dir, 'test_dir'))

        write_data(os.path.join(src_dir, 'test_dir', 'test.txt'), '456')

        try:

            shutil.copytree(src_dir, dst_dir)

            self.assertTrue(os.path.isfile(os.path.join(dst_dir, 'test.txt')))

            self.assertTrue(os.path.isdir(os.path.join(dst_dir, 'test_dir')))

            self.assertTrue(os.path.isfile(os.path.join(dst_dir, 'test_dir',

                                                        'test.txt')))

            actual = read_data(os.path.join(dst_dir, 'test.txt'))

            self.assertEqual(actual, '123')

            actual = read_data(os.path.join(dst_dir, 'test_dir', 'test.txt'))

            self.assertEqual(actual, '456')

        finally:

            for path in (

                    os.path.join(src_dir, 'test.txt'),

                    os.path.join(dst_dir, 'test.txt'),

                    os.path.join(src_dir, 'test_dir', 'test.txt'),

                    os.path.join(dst_dir, 'test_dir', 'test.txt'),

                ):

                if os.path.exists(path):

                    os.remove(path)

            for path in (

                    os.path.join(src_dir, 'test_dir'),

                    os.path.join(dst_dir, 'test_dir'),

                ):

                if os.path.exists(path):

                    os.removedirs(path)

    if hasattr(os, "symlink"):

        def test_dont_copy_file_onto_link_to_itself(self):

            # bug 851123.

            os.mkdir(TESTFN)

            src = os.path.join(TESTFN, 'cheese')

            dst = os.path.join(TESTFN, 'shop')

            try:

                f = open(src, 'w')

                f.write('cheddar')

                f.close()

                os.link(src, dst)

                self.assertRaises(shutil.Error, shutil.copyfile, src, dst)

                self.assertEqual(open(src,'r').read(), 'cheddar')

                os.remove(dst)

                # Using `src` here would mean we end up with a symlink pointing

                # to TESTFN/TESTFN/cheese, while it should point at

                # TESTFN/cheese.

                os.symlink('cheese', dst)

                self.assertRaises(shutil.Error, shutil.copyfile, src, dst)

                self.assertEqual(open(src,'r').read(), 'cheddar')

                os.remove(dst)

            finally:

                try:

                    shutil.rmtree(TESTFN)

                except OSError:

                    pass

def test_main():

    test_support.run_unittest(TestShutil)

if __name__ == '__main__':

    test_main()