"""
Tests common to genericpath, ntpath and posixpath
"""

import genericpath
import os
import sys
import unittest
import warnings
from test import support
from test.support.script_helper import assert_python_ok
from test.support import FakePath


def create_file(filename, data=b'foo'):
    with open(filename, 'xb', 0) as fp:
        fp.write(data)


class GenericTest:
    common_attributes = ['commonprefix', 'getsize', 'getatime', 'getctime',
                         'getmtime', 'exists', 'isdir', 'isfile']
    attributes = []

    def test_no_argument(self):
        for attr in self.common_attributes + self.attributes:
            with self.assertRaises(TypeError):
                getattr(self.pathmodule, attr)()
                raise self.fail("{}.{}() did not raise a TypeError"
                                .format(self.pathmodule.__name__, attr))

    def test_commonprefix(self):
        commonprefix = self.pathmodule.commonprefix
        self.assertEqual(
            commonprefix([]),
            ""
        )
        self.assertEqual(
            commonprefix(["/home/swenson/spam", "/home/swen/spam"]),
            "/home/swen"
        )
        self.assertEqual(
            commonprefix(["/home/swen/spam", "/home/swen/eggs"]),
            "/home/swen/"
        )
        self.assertEqual(
            commonprefix(["/home/swen/spam", "/home/swen/spam"]),
            "/home/swen/spam"
        )
        self.assertEqual(
            commonprefix(["home:swenson:spam", "home:swen:spam"]),
            "home:swen"
        )
        self.assertEqual(
            commonprefix([":home:swen:spam", ":home:swen:eggs"]),
            ":home:swen:"
        )
        self.assertEqual(
            commonprefix([":home:swen:spam", ":home:swen:spam"]),
            ":home:swen:spam"
        )

        self.assertEqual(
            commonprefix([b"/home/swenson/spam", b"/home/swen/spam"]),
            b"/home/swen"
        )
        self.assertEqual(
            commonprefix([b"/home/swen/spam", b"/home/swen/eggs"]),
            b"/home/swen/"
        )
        self.assertEqual(
            commonprefix([b"/home/swen/spam", b"/home/swen/spam"]),
            b"/home/swen/spam"
        )
        self.assertEqual(
            commonprefix([b"home:swenson:spam", b"home:swen:spam"]),
            b"home:swen"
        )
        self.assertEqual(
            commonprefix([b":home:swen:spam", b":home:swen:eggs"]),
            b":home:swen:"
        )
        self.assertEqual(
            commonprefix([b":home:swen:spam", b":home:swen:spam"]),
            b":home:swen:spam"
        )

        testlist = ['', 'abc', 'Xbcd', 'Xb', 'XY', 'abcd',
                    'aXc', 'abd', 'ab', 'aX', 'abcX']
        for s1 in testlist:
            for s2 in testlist:
                p = commonprefix([s1, s2])
                self.assertTrue(s1.startswith(p))
                self.assertTrue(s2.startswith(p))
                if s1 != s2:
                    n = len(p)
                    self.assertNotEqual(s1[n:n+1], s2[n:n+1])

    def test_getsize(self):
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)

        create_file(filename, b'Hello')
        self.assertEqual(self.pathmodule.getsize(filename), 5)
        os.remove(filename)

        create_file(filename, b'Hello World!')
        self.assertEqual(self.pathmodule.getsize(filename), 12)

    def test_filetime(self):
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)

        create_file(filename, b'foo')

        with open(filename, "ab", 0) as f:
            f.write(b"bar")

        with open(filename, "rb", 0) as f:
            data = f.read()
        self.assertEqual(data, b"foobar")

        self.assertLessEqual(
            self.pathmodule.getctime(filename),
            self.pathmodule.getmtime(filename)
        )

    def test_exists(self):
        filename = support.TESTFN
        bfilename = os.fsencode(filename)
        self.addCleanup(support.unlink, filename)

        self.assertIs(self.pathmodule.exists(filename), False)
        self.assertIs(self.pathmodule.exists(bfilename), False)

        create_file(filename)

        self.assertIs(self.pathmodule.exists(filename), True)
        self.assertIs(self.pathmodule.exists(bfilename), True)

        self.assertIs(self.pathmodule.exists(filename + '\udfff'), False)
        self.assertIs(self.pathmodule.exists(bfilename + b'\xff'), False)
        self.assertIs(self.pathmodule.exists(filename + '\x00'), False)
        self.assertIs(self.pathmodule.exists(bfilename + b'\x00'), False)

        if self.pathmodule is not genericpath:
            self.assertIs(self.pathmodule.lexists(filename), True)
            self.assertIs(self.pathmodule.lexists(bfilename), True)

            self.assertIs(self.pathmodule.lexists(filename + '\udfff'), False)
            self.assertIs(self.pathmodule.lexists(bfilename + b'\xff'), False)
            self.assertIs(self.pathmodule.lexists(filename + '\x00'), False)
            self.assertIs(self.pathmodule.lexists(bfilename + b'\x00'), False)

    @unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
    def test_exists_fd(self):
        r, w = os.pipe()
        try:
            self.assertTrue(self.pathmodule.exists(r))
        finally:
            os.close(r)
            os.close(w)
        self.assertFalse(self.pathmodule.exists(r))

    def test_isdir(self):
        filename = support.TESTFN
        bfilename = os.fsencode(filename)
        self.assertIs(self.pathmodule.isdir(filename), False)
        self.assertIs(self.pathmodule.isdir(bfilename), False)

        self.assertIs(self.pathmodule.isdir(filename + '\udfff'), False)
        self.assertIs(self.pathmodule.isdir(bfilename + b'\xff'), False)
        self.assertIs(self.pathmodule.isdir(filename + '\x00'), False)
        self.assertIs(self.pathmodule.isdir(bfilename + b'\x00'), False)

        try:
            create_file(filename)
            self.assertIs(self.pathmodule.isdir(filename), False)
            self.assertIs(self.pathmodule.isdir(bfilename), False)
        finally:
            support.unlink(filename)

        try:
            os.mkdir(filename)
            self.assertIs(self.pathmodule.isdir(filename), True)
            self.assertIs(self.pathmodule.isdir(bfilename), True)
        finally:
            support.rmdir(filename)

    def test_isfile(self):
        filename = support.TESTFN
        bfilename = os.fsencode(filename)
        self.assertIs(self.pathmodule.isfile(filename), False)
        self.assertIs(self.pathmodule.isfile(bfilename), False)

        self.assertIs(self.pathmodule.isfile(filename + '\udfff'), False)
        self.assertIs(self.pathmodule.isfile(bfilename + b'\xff'), False)
        self.assertIs(self.pathmodule.isfile(filename + '\x00'), False)
        self.assertIs(self.pathmodule.isfile(bfilename + b'\x00'), False)

        try:
            create_file(filename)
            self.assertIs(self.pathmodule.isfile(filename), True)
            self.assertIs(self.pathmodule.isfile(bfilename), True)
        finally:
            support.unlink(filename)

        try:
            os.mkdir(filename)
            self.assertIs(self.pathmodule.isfile(filename), False)
            self.assertIs(self.pathmodule.isfile(bfilename), False)
        finally:
            support.rmdir(filename)

    def test_samefile(self):
        file1 = support.TESTFN
        file2 = support.TESTFN + "2"
        self.addCleanup(support.unlink, file1)
        self.addCleanup(support.unlink, file2)

        create_file(file1)
        self.assertTrue(self.pathmodule.samefile(file1, file1))

        create_file(file2)
        self.assertFalse(self.pathmodule.samefile(file1, file2))

        self.assertRaises(TypeError, self.pathmodule.samefile)

    def _test_samefile_on_link_func(self, func):
        test_fn1 = support.TESTFN
        test_fn2 = support.TESTFN + "2"
        self.addCleanup(support.unlink, test_fn1)
        self.addCleanup(support.unlink, test_fn2)

        create_file(test_fn1)

        func(test_fn1, test_fn2)
        self.assertTrue(self.pathmodule.samefile(test_fn1, test_fn2))
        os.remove(test_fn2)

        create_file(test_fn2)
        self.assertFalse(self.pathmodule.samefile(test_fn1, test_fn2))

    @support.skip_unless_symlink
    def test_samefile_on_symlink(self):
        self._test_samefile_on_link_func(os.symlink)

    def test_samefile_on_link(self):
        try:
            self._test_samefile_on_link_func(os.link)
        except PermissionError as e:
            self.skipTest('os.link(): %s' % e)

    def test_samestat(self):
        test_fn1 = support.TESTFN
        test_fn2 = support.TESTFN + "2"
        self.addCleanup(support.unlink, test_fn1)
        self.addCleanup(support.unlink, test_fn2)

        create_file(test_fn1)
        stat1 = os.stat(test_fn1)
        self.assertTrue(self.pathmodule.samestat(stat1, os.stat(test_fn1)))

        create_file(test_fn2)
        stat2 = os.stat(test_fn2)
        self.assertFalse(self.pathmodule.samestat(stat1, stat2))

        self.assertRaises(TypeError, self.pathmodule.samestat)

    def _test_samestat_on_link_func(self, func):
        test_fn1 = support.TESTFN + "1"
        test_fn2 = support.TESTFN + "2"
        self.addCleanup(support.unlink, test_fn1)
        self.addCleanup(support.unlink, test_fn2)

        create_file(test_fn1)
        func(test_fn1, test_fn2)
        self.assertTrue(self.pathmodule.samestat(os.stat(test_fn1),
                                                 os.stat(test_fn2)))
        os.remove(test_fn2)

        create_file(test_fn2)
        self.assertFalse(self.pathmodule.samestat(os.stat(test_fn1),
                                                  os.stat(test_fn2)))

    @support.skip_unless_symlink
    def test_samestat_on_symlink(self):
        self._test_samestat_on_link_func(os.symlink)

    def test_samestat_on_link(self):
        try:
            self._test_samestat_on_link_func(os.link)
        except PermissionError as e:
            self.skipTest('os.link(): %s' % e)

    def test_sameopenfile(self):
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)
        create_file(filename)

        with open(filename, "rb", 0) as fp1:
            fd1 = fp1.fileno()
            with open(filename, "rb", 0) as fp2:
                fd2 = fp2.fileno()
                self.assertTrue(self.pathmodule.sameopenfile(fd1, fd2))


class TestGenericTest(GenericTest, unittest.TestCase):
    # Issue 16852: GenericTest can't inherit from unittest.TestCase
    # for test discovery purposes; CommonTest inherits from GenericTest
    # and is only meant to be inherited by others.
    pathmodule = genericpath

    def test_invalid_paths(self):
        for attr in GenericTest.common_attributes:
            # os.path.commonprefix doesn't raise ValueError
            if attr == 'commonprefix':
                continue
            func = getattr(self.pathmodule, attr)
            with self.subTest(attr=attr):
                if attr in ('exists', 'isdir', 'isfile'):
                    func('/tmp\udfffabcds')
                    func(b'/tmp\xffabcds')
                    func('/tmp\x00abcds')
                    func(b'/tmp\x00abcds')
                else:
                    with self.assertRaises((OSError, UnicodeEncodeError)):
                        func('/tmp\udfffabcds')
                    with self.assertRaises((OSError, UnicodeDecodeError)):
                        func(b'/tmp\xffabcds')
                    with self.assertRaisesRegex(ValueError, 'embedded null'):
                        func('/tmp\x00abcds')
                    with self.assertRaisesRegex(ValueError, 'embedded null'):
                        func(b'/tmp\x00abcds')

# Following TestCase is not supposed to be run from test_genericpath.
# It is inherited by other test modules (ntpath, posixpath).

class CommonTest(GenericTest):
    common_attributes = GenericTest.common_attributes + [
        # Properties
        'curdir', 'pardir', 'extsep', 'sep',
        'pathsep', 'defpath', 'altsep', 'devnull',
        # Methods
        'normcase', 'splitdrive', 'expandvars', 'normpath', 'abspath',