#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Unit tests for gclient_scm.py."""

# pylint: disable=E1103

# Import before super_mox to keep valid references.
from shutil import rmtree
from subprocess import Popen, PIPE, STDOUT

import logging
import os
import re
import sys
import tempfile
import unittest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from testing_support.super_mox import mox, StdoutCheck, SuperMoxTestBase
from testing_support.super_mox import TestCaseUtils

import gclient_scm
import subprocess2

# Shortcut since this function is used often
join = gclient_scm.os.path.join

TIMESTAMP_RE = re.compile('\[[0-9]{1,2}:[0-9]{2}:[0-9]{2}\] (.*)', re.DOTALL)
def strip_timestamps(value):
  lines = value.splitlines(True)
  for i in xrange(len(lines)):
    m = TIMESTAMP_RE.match(lines[i])
    if m:
      lines[i] = m.group(1)
  return ''.join(lines)

# Access to a protected member XXX of a client class
# pylint: disable=W0212


class GCBaseTestCase(object):
  def assertRaisesError(self, msg, fn, *args, **kwargs):
    """Like unittest's assertRaises() but checks for Gclient.Error."""
    # pylint: disable=E1101
    try:
      fn(*args, **kwargs)
    except gclient_scm.gclient_utils.Error, e:
      self.assertEquals(e.args[0], msg)
    else:
      self.fail('%s not raised' % msg)


class BaseTestCase(GCBaseTestCase, SuperMoxTestBase):
  def setUp(self):
    SuperMoxTestBase.setUp(self)
    self.mox.StubOutWithMock(gclient_scm.gclient_utils, 'CheckCallAndFilter')
    self.mox.StubOutWithMock(gclient_scm.gclient_utils,
        'CheckCallAndFilterAndHeader')
    self.mox.StubOutWithMock(gclient_scm.gclient_utils, 'FileRead')
    self.mox.StubOutWithMock(gclient_scm.gclient_utils, 'FileWrite')
    self.mox.StubOutWithMock(gclient_scm.gclient_utils, 'rmtree')
    self.mox.StubOutWithMock(gclient_scm.scm.SVN, 'Capture')
    self.mox.StubOutWithMock(gclient_scm.scm.SVN, '_CaptureInfo')
    self.mox.StubOutWithMock(gclient_scm.scm.SVN, 'CaptureStatus')
    self.mox.StubOutWithMock(gclient_scm.scm.SVN, 'RunAndGetFileList')
    self.mox.StubOutWithMock(subprocess2, 'communicate')
    self.mox.StubOutWithMock(subprocess2, 'Popen')
    self._scm_wrapper = gclient_scm.CreateSCM
    gclient_scm.scm.SVN.current_version = None
    self._original_SVNBinaryExists = gclient_scm.SVNWrapper.BinaryExists
    self._original_GitBinaryExists = gclient_scm.GitWrapper.BinaryExists
    gclient_scm.SVNWrapper.BinaryExists = staticmethod(lambda : True)
    gclient_scm.GitWrapper.BinaryExists = staticmethod(lambda : True)
    # Absolute path of the fake checkout directory.
    self.base_path = join(self.root_dir, self.relpath)

  def tearDown(self):
    SuperMoxTestBase.tearDown(self)
    gclient_scm.SVNWrapper.BinaryExists = self._original_SVNBinaryExists
    gclient_scm.GitWrapper.BinaryExists = self._original_GitBinaryExists


class SVNWrapperTestCase(BaseTestCase):
  class OptionsObject(object):
    def __init__(self, verbose=False, revision=None, force=False):
      self.verbose = verbose
      self.revision = revision
      self.manually_grab_svn_rev = True
      self.deps_os = None
      self.force = force
      self.reset = False
      self.nohooks = False
      # TODO(maruel): Test --jobs > 1.
      self.jobs = 1
      self.delete_unversioned_trees = False

  def checkstdout(self, expected):
    value = sys.stdout.getvalue()
    sys.stdout.close()
    # pylint: disable=E1101
    self.assertEquals(expected, strip_timestamps(value))

  def Options(self, *args, **kwargs):
    return self.OptionsObject(*args, **kwargs)

  def setUp(self):
    BaseTestCase.setUp(self)
    self.url = self.SvnUrl()

  def testUnsupportedSCM(self):
    args = ['gopher://foo', self.root_dir, self.relpath]
    exception_msg = 'No SCM found for url gopher://foo'
    self.assertRaisesError(exception_msg, self._scm_wrapper, *args)

  def testSVNFullUrlForRelativeUrl(self):
    self.url = 'svn://a/b/c/d'

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    self.assertEqual(scm.FullUrlForRelativeUrl('/crap'), 'svn://a/b/crap')

  def testGITFullUrlForRelativeUrl(self):
    self.url = 'git://a/b/c/d'

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    self.assertEqual(scm.FullUrlForRelativeUrl('/crap'), 'git://a/b/c/crap')

  def testGITFakeHttpUrl(self):
    self.url = 'git+http://foo'

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    self.assertEqual(scm.url, 'http://foo')

  def testGITFakeHttpsUrl(self):
    self.url = 'git+https://foo'

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    self.assertEqual(scm.url, 'https://foo')

  def testRunCommandException(self):
    options = self.Options(verbose=False)
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    exception = "Unsupported argument(s): %s" % ','.join(self.args)
    self.assertRaisesError(exception, scm.RunCommand,
                           'update', options, self.args)

  def testRunCommandUnknown(self):
    # TODO(maruel): if ever used.
    pass

  def testRevertMissing(self):
    options = self.Options(verbose=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(False)
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    # It'll to a checkout instead.
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    # Checkout.
    gclient_scm.os.path.exists(self.base_path).AndReturn(False)
    parent = gclient_scm.os.path.dirname(self.base_path)
    gclient_scm.os.path.exists(parent).AndReturn(False)
    gclient_scm.os.makedirs(parent)
    gclient_scm.os.path.exists(parent).AndReturn(True)
    files_list = self.mox.CreateMockAnything()
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['checkout', self.url, self.base_path, '--force', '--ignore-externals'],
        cwd=self.root_dir,
        file_list=files_list)

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.revert(options, self.args, files_list)
    self.checkstdout(
        ('_____ %s is missing, synching instead\n' % self.relpath))

  def testRevertNoDotSvn(self):
    options = self.Options(verbose=True, force=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(join(self.base_path, '.svn')).AndReturn(False)
    gclient_scm.os.path.isdir(join(self.base_path, '.git')).AndReturn(False)
    gclient_scm.os.path.isdir(join(self.base_path, '.hg')).AndReturn(False)
    # Checkout.
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(False)
    parent = gclient_scm.os.path.dirname(self.base_path)
    gclient_scm.os.path.exists(parent).AndReturn(False)
    gclient_scm.os.makedirs(parent)
    gclient_scm.os.path.exists(parent).AndReturn(True)
    files_list = self.mox.CreateMockAnything()
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.6')
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['checkout', self.url, self.base_path, '--force', '--ignore-externals'],
        cwd=self.root_dir,
        file_list=files_list)
    gclient_scm.gclient_utils.rmtree(self.base_path)
    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})
    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.revert(options, self.args, files_list)
    self.checkstdout(
        '\n_____ %s is not a valid svn checkout, synching instead\n' %
        self.relpath)

  def testRevertNone(self):
    options = self.Options(verbose=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(join(self.base_path, '.svn')).AndReturn(True)
    gclient_scm.scm.SVN.CaptureStatus(
        None, self.base_path, no_ignore=False).AndReturn([])
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['update', '--revision', 'BASE', '--ignore-externals'],
        cwd=self.base_path,
        file_list=mox.IgnoreArg())

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list = []
    scm.revert(options, self.args, file_list)

  def testRevertDirectory(self):
    options = self.Options(verbose=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(join(self.base_path, '.svn')).AndReturn(True)
    items = [
      ('~      ', 'a'),
    ]
    gclient_scm.scm.SVN.CaptureStatus(
        None, self.base_path, no_ignore=False).AndReturn(items)
    file_path = join(self.base_path, 'a')
    gclient_scm.os.path.exists(file_path).AndReturn(True)
    gclient_scm.os.path.isfile(file_path).AndReturn(False)
    gclient_scm.os.path.islink(file_path).AndReturn(False)
    gclient_scm.os.path.isdir(file_path).AndReturn(True)
    gclient_scm.gclient_utils.rmtree(file_path)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['update', '--revision', 'BASE', '--ignore-externals'],
        cwd=self.base_path,
        file_list=mox.IgnoreArg())

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list2 = []
    scm.revert(options, self.args, file_list2)
    self.checkstdout(('%s\n' % file_path))

  def testRevertDot(self):
    self.mox.StubOutWithMock(gclient_scm.SVNWrapper, 'update')
    options = self.Options(verbose=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(join(self.base_path, '.svn')).AndReturn(True)
    items = [
      ('~      ', '.'),
    ]
    gclient_scm.scm.SVN.CaptureStatus(
        None, self.base_path, no_ignore=False).AndReturn(items)
    # gclient_utils.rmtree() doesn't work on path ending with '.', like 'foo/.'.
    file_path = self.base_path
    gclient_scm.os.path.exists(file_path).AndReturn(True)
    gclient_scm.os.path.isfile(file_path).AndReturn(False)
    gclient_scm.os.path.islink(file_path).AndReturn(False)
    gclient_scm.os.path.isdir(file_path).AndReturn(True)
    gclient_scm.gclient_utils.rmtree(file_path)
    # pylint: disable=E1120
    gclient_scm.os.path.isdir(self.base_path).AndReturn(False)
    gclient_scm.SVNWrapper.update(options, [], ['.'])

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list2 = []
    scm.revert(options, self.args, file_list2)
    self.checkstdout(('%s\n' % os.path.join(file_path, '.')))

  def testStatus(self):
    options = self.Options(verbose=True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['status'] + self.args + ['--ignore-externals'],
        cwd=self.base_path,
        file_list=[]).AndReturn(None)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list = []
    self.assertEqual(scm.status(options, self.args, file_list), None)

  # TODO(maruel):  TEST REVISIONS!!!
  # TODO(maruel):  TEST RELOCATE!!!
  def testUpdateCheckout(self):
    options = self.Options(verbose=True)
    file_info = gclient_scm.gclient_utils.PrintableObject()
    file_info.root = 'blah'
    file_info.url = self.url
    file_info.uuid = 'ABC'
    file_info.revision = 42
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    # Checkout.
    gclient_scm.os.path.exists(self.base_path).AndReturn(False)
    parent = gclient_scm.os.path.dirname(self.base_path)
    gclient_scm.os.path.exists(parent).AndReturn(False)
    gclient_scm.os.makedirs(parent)
    gclient_scm.os.path.exists(parent).AndReturn(True)
    files_list = self.mox.CreateMockAnything()
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['checkout', self.url, self.base_path, '--force', '--ignore-externals'],
        cwd=self.root_dir,
        file_list=files_list)
    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})
    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, (), files_list)

  def testUpdateUpdate(self):
    options = self.Options(verbose=True)
    options.force = True
    options.nohooks = False
    file_info = {
      'Repository Root': 'blah',
      'URL': self.url,
      'UUID': 'ABC',
      'Revision': 42,
    }
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)

    # Checkout or update.
    dotted_path = join(self.base_path, '.')
    gclient_scm.scm.SVN._CaptureInfo([], dotted_path).AndReturn(file_info)

    # Verify no locked files.
    gclient_scm.scm.SVN.CaptureStatus(None, dotted_path).AndReturn([])

    # Cheat a bit here.
    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    # _AddAdditionalUpdateFlags()
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    additional_args = []
    if options.manually_grab_svn_rev:
      additional_args = ['--revision', str(file_info['Revision'])]
    additional_args.extend(['--force', '--ignore-externals'])
    files_list = []
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['update', self.base_path] + additional_args,
        cwd=self.root_dir, file_list=files_list)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, (), files_list)

  def testUpdateReset(self):
    options = self.Options(verbose=True)
    options.reset = True
    file_info = {
      'Repository Root': 'blah',
      'URL': self.url,
      'UUID': 'ABC',
      'Revision': 42,
    }
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)

    # Checkout or update.
    dotted_path = join(self.base_path, '.')
    gclient_scm.scm.SVN._CaptureInfo([], dotted_path).AndReturn(file_info)

    # Create an untracked file and directory.
    gclient_scm.scm.SVN.CaptureStatus(None, dotted_path
        ).AndReturn([['?  ', 'dir'], ['?  ', 'file']])

    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    files_list = []
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, (), files_list)
    self.checkstdout('_____ %s at 42\n' % self.relpath)

  def testUpdateResetDeleteUnversionedTrees(self):
    options = self.Options(verbose=True)
    options.reset = True
    options.delete_unversioned_trees = True

    file_info = {
      'Repository Root': 'blah',
      'URL': self.url,
      'UUID': 'ABC',
      'Revision': 42,
    }
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)

    # Checkout or update.
    dotted_path = join(self.base_path, '.')
    gclient_scm.scm.SVN._CaptureInfo([], dotted_path).AndReturn(file_info)

    # Create an untracked file and directory.
    gclient_scm.scm.SVN.CaptureStatus(None, dotted_path
        ).AndReturn([['?  ', 'dir'], ['?  ', 'file']])

    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    # Confirm that the untracked file is removed.
    gclient_scm.scm.SVN.CaptureStatus(None, self.base_path
        ).AndReturn([['?  ', 'dir'], ['?  ', 'file']])
    gclient_scm.os.path.isdir(join(self.base_path, 'dir')).AndReturn(True)
    gclient_scm.os.path.isdir(join(self.base_path, 'file')).AndReturn(False)
    gclient_scm.os.path.islink(join(self.base_path, 'dir')).AndReturn(False)
    gclient_scm.gclient_utils.rmtree(join(self.base_path, 'dir'))

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    files_list = []
    scm.update(options, (), files_list)
    self.checkstdout(
      ('_____ %s at 42\n'
       '_____ removing unversioned directory dir\n') % self.relpath)

  def testUpdateSingleCheckout(self):
    options = self.Options(verbose=True)
    file_info = {
      'URL': self.url,
      'Revision': 42,
    }

    # Checks to make sure that we support svn co --depth.
    gclient_scm.scm.SVN.current_version = None
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.os.path.exists(join(self.base_path, '.svn')).AndReturn(False)
    gclient_scm.os.path.exists(join(self.base_path, 'DEPS')).AndReturn(False)

    # Verify no locked files.
    dotted_path = join(self.base_path, '.')
    gclient_scm.scm.SVN.CaptureStatus(None, dotted_path).AndReturn([])

    # When checking out a single file, we issue an svn checkout and svn update.
    files_list = self.mox.CreateMockAnything()
    gclient_scm.gclient_utils.CheckCallAndFilterAndHeader(
        ['svn', 'checkout', '--depth', 'empty', self.url, self.base_path],
        always=True,
        cwd=self.root_dir)
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['update', 'DEPS', '--ignore-externals'],
        cwd=self.base_path,
        file_list=files_list)

    # Now we fall back on scm.update().
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN._CaptureInfo([], dotted_path).AndReturn(file_info)
    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.updatesingle(options, ['DEPS'], files_list)
    self.checkstdout('_____ %s at 42\n' % self.relpath)

  def testUpdateSingleCheckoutSVN14(self):
    options = self.Options(verbose=True)

    # Checks to make sure that we support svn co --depth.
    gclient_scm.scm.SVN.current_version = None
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.4.4')
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)

    # When checking out a single file with svn 1.4, we use svn export
    files_list = self.mox.CreateMockAnything()
    gclient_scm.gclient_utils.CheckCallAndFilterAndHeader(
        ['svn', 'export', join(self.url, 'DEPS'), join(self.base_path, 'DEPS')],
        always=True, cwd=self.root_dir)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.updatesingle(options, ['DEPS'], files_list)

  def testUpdateSingleCheckoutSVNUpgrade(self):
    options = self.Options(verbose=True)
    file_info = {
      'URL': self.url,
      'Revision': 42,
    }

    # Checks to make sure that we support svn co --depth.
    gclient_scm.scm.SVN.current_version = None
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.os.path.exists(join(self.base_path, '.svn')).AndReturn(False)
    # If DEPS already exists, assume we're upgrading from svn1.4, so delete
    # the old DEPS file.
    gclient_scm.os.path.exists(join(self.base_path, 'DEPS')).AndReturn(True)
    gclient_scm.os.remove(join(self.base_path, 'DEPS'))

    # Verify no locked files.
    gclient_scm.scm.SVN.CaptureStatus(
        None, join(self.base_path, '.')).AndReturn([])

    # When checking out a single file, we issue an svn checkout and svn update.
    files_list = self.mox.CreateMockAnything()
    gclient_scm.gclient_utils.CheckCallAndFilterAndHeader(
        ['svn', 'checkout', '--depth', 'empty', self.url, self.base_path],
        always=True,
        cwd=self.root_dir)
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['update', 'DEPS', '--ignore-externals'],
        cwd=self.base_path,
        file_list=files_list)

    # Now we fall back on scm.update().
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN._CaptureInfo(
        [], join(self.base_path, ".")).AndReturn(file_info)
    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.updatesingle(options, ['DEPS'], files_list)
    self.checkstdout(
        ('_____ %s at 42\n' % self.relpath))

  def testUpdateSingleUpdate(self):
    options = self.Options(verbose=True)
    file_info = {
      'URL': self.url,
      'Revision': 42,
    }
    # Checks to make sure that we support svn co --depth.
    gclient_scm.scm.SVN.current_version = None
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.os.path.exists(join(self.base_path, '.svn')).AndReturn(True)

    # Verify no locked files.
    gclient_scm.scm.SVN.CaptureStatus(None, join(self.base_path, '.')
        ).AndReturn([])

    # Now we fall back on scm.update().
    files_list = self.mox.CreateMockAnything()
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(False)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    gclient_scm.scm.SVN._CaptureInfo(
        [], join(self.base_path, '.')).AndReturn(file_info)
    gclient_scm.scm.SVN._CaptureInfo([file_info['URL']], None
        ).AndReturn(file_info)

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.updatesingle(options, ['DEPS'], files_list)
    self.checkstdout('_____ %s at 42\n' % self.relpath)

  def testUpdateGit(self):
    options = self.Options(verbose=True)
    file_path = gclient_scm.os.path.join(self.root_dir, self.relpath, '.hg')
    gclient_scm.os.path.exists(file_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    error = gclient_scm.subprocess2.CalledProcessError(
        1, 'cmd', '/cwd', 'stdout', 'stderr')
    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.').AndRaise(error)

    gclient_scm.os.path.exists(self.root_dir).AndReturn(True)
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['checkout', self.url, self.base_path, '--force', '--ignore-externals'],
        cwd=self.root_dir,
        file_list=[])

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, None, [])

  def testUpdateGitForce(self):
    options = self.Options(verbose=True, force=True)
    file_path = gclient_scm.os.path.join(self.root_dir, self.relpath, '.hg')
    gclient_scm.os.path.exists(file_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(False)
    error = gclient_scm.subprocess2.CalledProcessError(
        1, 'cmd', '/cwd', 'stdout', 'stderr')
    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.').AndRaise(error)
    gclient_scm.os.path.exists(self.root_dir).AndReturn(True)
    gclient_scm.scm.SVN.Capture(['--version', '--quiet'], None
        ).AndReturn('1.5.1')
    gclient_scm.scm.SVN.RunAndGetFileList(
        options.verbose,
        ['checkout', self.url, self.base_path, '--force', '--ignore-externals'],
        cwd=self.root_dir,
        file_list=[])

    gclient_scm.scm.SVN._CaptureInfo([], self.base_path+'/.'
        ).AndReturn({'Revision': 100})

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list = []
    scm.update(options, None, file_list)

  def testUpdateGitSvn(self):
    options = self.Options(verbose=True)
    file_path = gclient_scm.os.path.join(self.root_dir, self.relpath, '.hg')
    gclient_scm.os.path.exists(file_path).AndReturn(False)
    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(self.base_path).AndReturn(True)
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'Capture', True)
    gclient_scm.scm.GIT.Capture(['config', '--local', '--get',
                                 'svn-remote.svn.url'],
                                cwd=self.base_path).AndReturn(self.url)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list = []
    scm.update(options, [], file_list)
    self.checkstdout(
        ('\n_____ %s looks like a git-svn checkout. Skipping.\n' % self.relpath)
        )

  def testUpdateHg(self):
    options = self.Options(verbose=True)
    gclient_scm.os.path.exists(join(self.base_path, '.hg')).AndReturn(True)

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    file_list = []
    scm.update(options, self.args, file_list)
    self.checkstdout(
        ('________ found .hg directory; skipping %s\n' % self.relpath))

  def testGetUsableRevSVN(self):
    # pylint: disable=E1101
    options = self.Options(verbose=True)

    # Mock SVN revision validity checking.
    self.mox.StubOutWithMock(
        gclient_scm.scm.SVN, 'IsValidRevision', True)
    gclient_scm.scm.SVN.IsValidRevision(url='%s@%s' % (self.url, 1)
        ).AndReturn(True)
    gclient_scm.scm.SVN.IsValidRevision(url='%s@%s' % (self.url, 'fake')
        ).AndReturn(False)

    self.mox.ReplayAll()

    svn_scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir)
    # With an SVN checkout, 1 an example of a valid usable rev.
    self.assertEquals(svn_scm.GetUsableRev(1, options), 1)
    # With an SVN checkout, a fake or unknown rev should raise an excpetion.
    self.assertRaises(gclient_scm.gclient_utils.Error,
                      svn_scm.GetUsableRev, 'fake', options)

class BaseGitWrapperTestCase(GCBaseTestCase, StdoutCheck, TestCaseUtils,
                             unittest.TestCase):
  """This class doesn't use pymox."""
  class OptionsObject(object):
    def __init__(self, verbose=False, revision=None):
      self.verbose = verbose
      self.revision = revision
      self.manually_grab_svn_rev = True
      self.deps_os = None
      self.force = False
      self.reset = False
      self.nohooks = False
      self.upstream = False
      self.cache_dir = None
      self.merge = False
      self.jobs = 1
      self.delete_unversioned_trees = False

  sample_git_import = """blob
mark :1
data 6
Hello

blob
mark :2
data 4
Bye

reset refs/heads/master
commit refs/heads/master
mark :3
author Bob <bob@example.com> 1253744361 -0700
committer Bob <bob@example.com> 1253744361 -0700
data 8
A and B
M 100644 :1 a
M 100644 :2 b

blob
mark :4
data 10
Hello
You

blob
mark :5
data 8
Bye
You

commit refs/heads/origin
mark :6
author Alice <alice@example.com> 1253744424 -0700
committer Alice <alice@example.com> 1253744424 -0700
data 13
Personalized
from :3
M 100644 :4 a
M 100644 :5 b

blob
mark :7
data 5
Mooh

commit refs/heads/feature
mark :8
author Bob <bob@example.com> 1390311986 -0000
committer Bob <bob@example.com> 1390311986 -0000
data 6
Add C
from :3
M 100644 :7 c

reset refs/heads/master
from :3
"""
  def Options(self, *args, **kwargs):
    return self.OptionsObject(*args, **kwargs)

  def checkstdout(self, expected):
    value = sys.stdout.getvalue()
    sys.stdout.close()
    # pylint: disable=E1101
    self.assertEquals(expected, strip_timestamps(value))

  @staticmethod
  def CreateGitRepo(git_import, path):
    """Do it for real."""
    try:
      Popen(['git', 'init', '-q'], stdout=PIPE, stderr=STDOUT,
            cwd=path).communicate()
    except OSError:
      # git is not available, skip this test.
      return False
    Popen(['git', 'fast-import', '--quiet'], stdin=PIPE, stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate(input=git_import)
    Popen(['git', 'checkout', '-q'], stdout=PIPE, stderr=STDOUT,
        cwd=path).communicate()
    Popen(['git', 'remote', 'add', '-f', 'origin', '.'], stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate()
    Popen(['git', 'checkout', '-b', 'new', 'origin/master', '-q'], stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate()
    Popen(['git', 'push', 'origin', 'origin/origin:origin/master', '-q'],
        stdout=PIPE, stderr=STDOUT, cwd=path).communicate()
    Popen(['git', 'config', '--unset', 'remote.origin.fetch'], stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate()
    Popen(['git', 'config', 'user.email', 'someuser@chromium.org'], stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate()
    Popen(['git', 'config', 'user.name', 'Some User'], stdout=PIPE,
        stderr=STDOUT, cwd=path).communicate()
    return True

  def _GetAskForDataCallback(self, expected_prompt, return_value):
    def AskForData(prompt, options):
      self.assertEquals(prompt, expected_prompt)
      return return_value
    return AskForData

  def setUp(self):
    TestCaseUtils.setUp(self)
    unittest.TestCase.setUp(self)
    self.url = 'git://foo'
    self.root_dir = tempfile.mkdtemp()
    self.relpath = '.'
    self.base_path = join(self.root_dir, self.relpath)
    self.enabled = self.CreateGitRepo(self.sample_git_import, self.base_path)
    StdoutCheck.setUp(self)
    self._original_GitBinaryExists = gclient_scm.GitWrapper.BinaryExists
    self._original_SVNBinaryExists = gclient_scm.SVNWrapper.BinaryExists
    gclient_scm.GitWrapper.BinaryExists = staticmethod(lambda : True)
    gclient_scm.SVNWrapper.BinaryExists = staticmethod(lambda : True)

  def tearDown(self):
    try:
      rmtree(self.root_dir)
      StdoutCheck.tearDown(self)
      TestCaseUtils.tearDown(self)
      unittest.TestCase.tearDown(self)
    finally:
      # TODO(maruel): Use auto_stub.TestCase.
      gclient_scm.GitWrapper.BinaryExists = self._original_GitBinaryExists
      gclient_scm.SVNWrapper.BinaryExists = self._original_SVNBinaryExists


class ManagedGitWrapperTestCase(BaseGitWrapperTestCase):

  def testRevertMissing(self):
    if not self.enabled:
      return
    options = self.Options()
    file_path = join(self.base_path, 'a')
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, None, file_list)
    gclient_scm.os.remove(file_path)
    file_list = []
    scm.revert(options, self.args, file_list)
    self.assertEquals(file_list, [file_path])
    file_list = []
    scm.diff(options, self.args, file_list)
    self.assertEquals(file_list, [])
    sys.stdout.close()

  def testRevertNone(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, None, file_list)
    file_list = []
    scm.revert(options, self.args, file_list)
    self.assertEquals(file_list, [])
    self.assertEquals(scm.revinfo(options, self.args, None),
                      'a7142dc9f0009350b96a11f372b6ea658592aa95')
    sys.stdout.close()

  def testRevertModified(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, None, file_list)
    file_path = join(self.base_path, 'a')
    open(file_path, 'a').writelines('touched\n')
    file_list = []
    scm.revert(options, self.args, file_list)
    self.assertEquals(file_list, [file_path])
    file_list = []
    scm.diff(options, self.args, file_list)
    self.assertEquals(file_list, [])
    self.assertEquals(scm.revinfo(options, self.args, None),
                      'a7142dc9f0009350b96a11f372b6ea658592aa95')
    sys.stdout.close()

  def testRevertNew(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, None, file_list)
    file_path = join(self.base_path, 'c')
    f = open(file_path, 'w')
    f.writelines('new\n')
    f.close()
    Popen(['git', 'add', 'c'], stdout=PIPE,
          stderr=STDOUT, cwd=self.base_path).communicate()
    file_list = []
    scm.revert(options, self.args, file_list)
    self.assertEquals(file_list, [file_path])
    file_list = []
    scm.diff(options, self.args, file_list)
    self.assertEquals(file_list, [])
    self.assertEquals(scm.revinfo(options, self.args, None),
                      'a7142dc9f0009350b96a11f372b6ea658592aa95')
    sys.stdout.close()

  def testStatusNew(self):
    if not self.enabled:
      return
    options = self.Options()
    file_path = join(self.base_path, 'a')
    open(file_path, 'a').writelines('touched\n')
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.status(options, self.args, file_list)
    self.assertEquals(file_list, [file_path])
    self.checkstdout(
        ('running \'git diff --name-status '
         '069c602044c5388d2d15c3f875b057c852003458\' in \'%s\'\nM\ta\n') %
            join(self.root_dir, '.'))

  def testStatus2New(self):
    if not self.enabled:
      return
    options = self.Options()
    expected_file_list = []
    for f in ['a', 'b']:
      file_path = join(self.base_path, f)
      open(file_path, 'a').writelines('touched\n')
      expected_file_list.extend([file_path])
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.status(options, self.args, file_list)
    expected_file_list = [join(self.base_path, x) for x in ['a', 'b']]
    self.assertEquals(sorted(file_list), expected_file_list)
    self.checkstdout(
        ('running \'git diff --name-status '
         '069c602044c5388d2d15c3f875b057c852003458\' in \'%s\'\nM\ta\nM\tb\n') %
            join(self.root_dir, '.'))

  def testUpdateUpdate(self):
    if not self.enabled:
      return
    options = self.Options()
    expected_file_list = [join(self.base_path, x) for x in ['a', 'b']]
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, (), file_list)
    self.assertEquals(file_list, expected_file_list)
    self.assertEquals(scm.revinfo(options, (), None),
                      'a7142dc9f0009350b96a11f372b6ea658592aa95')
    sys.stdout.close()

  def testUpdateMerge(self):
    if not self.enabled:
      return
    options = self.Options()
    options.merge = True
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    scm._Run(['checkout', '-q', 'feature'], options)
    rev = scm.revinfo(options, (), None)
    file_list = []
    scm.update(options, (), file_list)
    self.assertEquals(file_list, [join(self.base_path, x)
                                  for x in ['a', 'b', 'c']])
    # The actual commit that is created is unstable, so we verify its tree and
    # parents instead.
    self.assertEquals(scm._Capture(['rev-parse', 'HEAD:']),
                      'd2e35c10ac24d6c621e14a1fcadceb533155627d')
    self.assertEquals(scm._Capture(['rev-parse', 'HEAD^1']), rev)
    self.assertEquals(scm._Capture(['rev-parse', 'HEAD^2']),
                      scm._Capture(['rev-parse', 'origin/master']))
    sys.stdout.close()

  def testUpdateRebase(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    scm._Run(['checkout', '-q', 'feature'], options)
    file_list = []
    # Fake a 'y' key press.
    scm._AskForData = self._GetAskForDataCallback(
        'Cannot fast-forward merge, attempt to rebase? '
        '(y)es / (q)uit / (s)kip : ', 'y')
    scm.update(options, (), file_list)
    self.assertEquals(file_list, [join(self.base_path, x)
                                  for x in ['a', 'b', 'c']])
    # The actual commit that is created is unstable, so we verify its tree and
    # parent instead.
    self.assertEquals(scm._Capture(['rev-parse', 'HEAD:']),
                      'd2e35c10ac24d6c621e14a1fcadceb533155627d')
    self.assertEquals(scm._Capture(['rev-parse', 'HEAD^']),
                      scm._Capture(['rev-parse', 'origin/master']))
    sys.stdout.close()

  def testUpdateReset(self):
    if not self.enabled:
      return
    options = self.Options()
    options.reset = True

    dir_path = join(self.base_path, 'c')
    os.mkdir(dir_path)
    open(join(dir_path, 'nested'), 'w').writelines('new\n')

    file_path = join(self.base_path, 'file')
    open(file_path, 'w').writelines('new\n')

    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, (), file_list)
    self.assert_(gclient_scm.os.path.isdir(dir_path))
    self.assert_(gclient_scm.os.path.isfile(file_path))
    sys.stdout.close()

  def testUpdateResetDeleteUnversionedTrees(self):
    if not self.enabled:
      return
    options = self.Options()
    options.reset = True
    options.delete_unversioned_trees = True

    dir_path = join(self.base_path, 'dir')
    os.mkdir(dir_path)
    open(join(dir_path, 'nested'), 'w').writelines('new\n')

    file_path = join(self.base_path, 'file')
    open(file_path, 'w').writelines('new\n')

    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    scm.update(options, (), file_list)
    self.assert_(not gclient_scm.os.path.isdir(dir_path))
    self.assert_(gclient_scm.os.path.isfile(file_path))
    sys.stdout.close()

  def testUpdateUnstagedConflict(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_path = join(self.base_path, 'b')
    open(file_path, 'w').writelines('conflict\n')
    try:
      scm.update(options, (), [])
      self.fail()
    except (gclient_scm.gclient_utils.Error, subprocess2.CalledProcessError):
      # The exact exception text varies across git versions so it's not worth
      # verifying it. It's fine as long as it throws.
      pass
    # Manually flush stdout since we can't verify it's content accurately across
    # git versions.
    sys.stdout.getvalue()
    sys.stdout.close()

  def testUpdateConflict(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_path = join(self.base_path, 'b')
    open(file_path, 'w').writelines('conflict\n')
    scm._Run(['commit', '-am', 'test'], options)
    scm._AskForData = self._GetAskForDataCallback(
        'Cannot fast-forward merge, attempt to rebase? '
        '(y)es / (q)uit / (s)kip : ', 'y')
    exception = ('Conflict while rebasing this branch.\n'
                 'Fix the conflict and run gclient again.\n'
                 'See \'man git-rebase\' for details.\n')
    self.assertRaisesError(exception, scm.update, options, (), [])
    exception = ('\n____ . at refs/remotes/origin/master\n'
                 '\tYou have unstaged changes.\n'
                 '\tPlease commit, stash, or reset.\n')
    self.assertRaisesError(exception, scm.update, options, (), [])
    sys.stdout.close()

  def testRevinfo(self):
    if not self.enabled:
      return
    options = self.Options()
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    rev_info = scm.revinfo(options, (), None)
    self.assertEquals(rev_info, '069c602044c5388d2d15c3f875b057c852003458')


class ManagedGitWrapperTestCaseMox(BaseTestCase):
  class OptionsObject(object):
    def __init__(self, verbose=False, revision=None, force=False):
      self.verbose = verbose
      self.revision = revision
      self.deps_os = None
      self.force = force
      self.reset = False
      self.nohooks = False
      # TODO(maruel): Test --jobs > 1.
      self.jobs = 1

  def Options(self, *args, **kwargs):
    return self.OptionsObject(*args, **kwargs)

  def checkstdout(self, expected):
    value = sys.stdout.getvalue()
    sys.stdout.close() 
    # pylint: disable=E1101
    self.assertEquals(expected, strip_timestamps(value))

  def setUp(self):
    BaseTestCase.setUp(self)
    self.fake_hash_1 = 't0ta11yf4k3'
    self.fake_hash_2 = '3v3nf4k3r'
    self.url = 'git://foo'
    self.root_dir = '/tmp' if sys.platform != 'win32' else 't:\\tmp'
    self.relpath = 'fake'
    self.base_path = os.path.join(self.root_dir, self.relpath)

  def tearDown(self):
    BaseTestCase.tearDown(self)

  def testGetUsableRevGit(self):
    # pylint: disable=E1101
    options = self.Options(verbose=True)

    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsValidRevision', True)
    gclient_scm.scm.GIT.IsValidRevision(cwd=self.base_path, rev=self.fake_hash_1
        ).AndReturn(True)

    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(cwd=self.base_path).MultipleTimes(
        ).AndReturn(False)

    gclient_scm.scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)

    self.mox.ReplayAll()

    git_scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                    relpath=self.relpath)
    # A [fake] git sha1 with a git repo should work (this is in the case that
    # the LKGR gets flipped to git sha1's some day).
    self.assertEquals(git_scm.GetUsableRev(self.fake_hash_1, options),
                      self.fake_hash_1)
    # An SVN rev with an existing purely git repo should raise an exception.
    self.assertRaises(gclient_scm.gclient_utils.Error,
                      git_scm.GetUsableRev, '1', options)

  def testGetUsableRevGitSvn(self):
    # pylint: disable=E1101
    options = self.Options()
    too_big = str(1e7)

    # Pretend like the git-svn repo's HEAD is at r2.
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'GetGitSvnHeadRev', True)
    gclient_scm.scm.GIT.GetGitSvnHeadRev(cwd=self.base_path).MultipleTimes(
        ).AndReturn(2)

    self.mox.StubOutWithMock(
        gclient_scm.scm.GIT, 'GetBlessedSha1ForSvnRev', True)
    # r1 -> first fake hash, r3 -> second fake hash.
    gclient_scm.scm.GIT.GetBlessedSha1ForSvnRev(cwd=self.base_path, rev='1'
        ).AndReturn(self.fake_hash_1)
    gclient_scm.scm.GIT.GetBlessedSha1ForSvnRev(cwd=self.base_path, rev='3'
        ).MultipleTimes().AndReturn(self.fake_hash_2)

    # Ensure that we call git svn fetch if our LKGR is > the git-svn HEAD rev.
    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'Capture', True)
    gclient_scm.scm.GIT.Capture(['config', '--get', 'svn-remote.svn.fetch'],
                                cwd=self.base_path).AndReturn('blah')
    gclient_scm.scm.GIT.Capture(['fetch'], cwd=self.base_path)
    gclient_scm.scm.GIT.Capture(['svn', 'fetch'], cwd=self.base_path)
    error = subprocess2.CalledProcessError(1, 'cmd', '/cwd', 'stdout', 'stderr')
    gclient_scm.scm.GIT.Capture(['config', '--get', 'svn-remote.svn.fetch'],
                                cwd=self.base_path).AndRaise(error)
    gclient_scm.scm.GIT.Capture(['svn', 'fetch'], cwd=self.base_path)
    gclient_scm.scm.GIT.Capture(['fetch', 'origin'], cwd=self.base_path)

    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsGitSvn', True)
    gclient_scm.scm.GIT.IsGitSvn(cwd=self.base_path).MultipleTimes(
        ).AndReturn(True)

    self.mox.StubOutWithMock(gclient_scm.scm.GIT, 'IsValidRevision', True)
    gclient_scm.scm.GIT.IsValidRevision(cwd=self.base_path, rev=self.fake_hash_1
        ).AndReturn(True)
    gclient_scm.scm.GIT.IsValidRevision(cwd=self.base_path, rev=too_big
        ).MultipleTimes(2).AndReturn(False)

    gclient_scm.os.path.isdir(self.base_path).AndReturn(False)
    gclient_scm.os.path.isdir(self.base_path).MultipleTimes().AndReturn(True)

    self.mox.ReplayAll()

    git_svn_scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                                    relpath=self.relpath)
    # Without an existing checkout, this should fail.
    # TODO(dbeam) Fix this. http://crbug.com/109184
    self.assertRaises(gclient_scm.gclient_utils.Error,
                      git_svn_scm.GetUsableRev, '1', options)
    # Given an SVN revision with a git-svn checkout, it should be translated to
    # a git sha1 and be usable.
    self.assertEquals(git_svn_scm.GetUsableRev('1', options),
                      self.fake_hash_1)
    # Our fake HEAD rev is r2, so this should call git fetch and git svn fetch
    # to get more revs (pymox will complain if this doesn't happen). We mock an
    # optimized checkout the first time, so this run should call git fetch.
    self.assertEquals(git_svn_scm.GetUsableRev('3', options),
                      self.fake_hash_2)
    # The time we pretend we're not optimized, so no git fetch should fire.
    self.assertEquals(git_svn_scm.GetUsableRev('3', options),
                      self.fake_hash_2)
    # Given a git sha1 with a git-svn checkout, it should be used as is.
    self.assertEquals(git_svn_scm.GetUsableRev(self.fake_hash_1, options),
                      self.fake_hash_1)
    # We currently check for seemingly valid SVN revisions by assuming 6 digit
    # numbers, so assure that numeric revs >= 1000000 don't work.
    self.assertRaises(gclient_scm.gclient_utils.Error,
                      git_svn_scm.GetUsableRev, too_big, options)

  def testUpdateNoDotGit(self):
    options = self.Options()

    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.exists(os.path.join(self.base_path, '.git')
                               ).AndReturn(False)

    self.mox.StubOutWithMock(gclient_scm.GitWrapper, '_Clone', True)
    # pylint: disable=E1120
    gclient_scm.GitWrapper._Clone('refs/remotes/origin/master', self.url,
                                  options)
    self.mox.StubOutWithMock(gclient_scm.subprocess2, 'check_output', True)
    gclient_scm.subprocess2.check_output(
        ['git', 'ls-files'], cwd=self.base_path,
        env=gclient_scm.scm.GIT.ApplyEnvVars({}), stderr=-1,).AndReturn('')
    gclient_scm.subprocess2.check_output(
        ['git', 'rev-parse', '--verify', 'HEAD'],
        cwd=self.base_path,
        env=gclient_scm.scm.GIT.ApplyEnvVars({}),
        stderr=-1,
        ).AndReturn('')

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, None, [])
    self.checkstdout('\n')

  def testUpdateConflict(self):
    options = self.Options()

    gclient_scm.os.path.exists(self.base_path).AndReturn(True)
    gclient_scm.os.path.isdir(self.base_path).AndReturn(True)
    gclient_scm.os.path.exists(os.path.join(self.base_path, '.git')
                               ).AndReturn(False)

    self.mox.StubOutWithMock(gclient_scm.GitWrapper, '_Clone', True)
    # pylint: disable=E1120
    gclient_scm.GitWrapper._Clone(
        'refs/remotes/origin/master', self.url, options
    ).AndRaise(gclient_scm.subprocess2.CalledProcessError(None, None, None,
                                                          None, None))
    self.mox.StubOutWithMock(gclient_scm.GitWrapper, '_DeleteOrMove', True)
    gclient_scm.GitWrapper._DeleteOrMove(False)
    gclient_scm.GitWrapper._Clone('refs/remotes/origin/master', self.url,
                                  options)
    self.mox.StubOutWithMock(gclient_scm.subprocess2, 'check_output', True)
    gclient_scm.subprocess2.check_output(
        ['git', 'ls-files'], cwd=self.base_path,
        env=gclient_scm.scm.GIT.ApplyEnvVars({}), stderr=-1,).AndReturn('')
    gclient_scm.subprocess2.check_output(
        ['git', 'rev-parse', '--verify', 'HEAD'],
        cwd=self.base_path,
        env=gclient_scm.scm.GIT.ApplyEnvVars({}),
        stderr=-1,
        ).AndReturn('')

    self.mox.ReplayAll()
    scm = self._scm_wrapper(url=self.url, root_dir=self.root_dir,
                            relpath=self.relpath)
    scm.update(options, None, [])
    self.checkstdout('\n')


class UnmanagedGitWrapperTestCase(BaseGitWrapperTestCase):
  def testUpdateUpdate(self):
    if not self.enabled:
      return
    options = self.Options()
    expected_file_list = []
    scm = gclient_scm.CreateSCM(url=self.url, root_dir=self.root_dir,
                                relpath=self.relpath)
    file_list = []
    options.revision = 'unmanaged'
    scm.update(options, (), file_list)
    self.assertEquals(file_list, expected_file_list)
    self.assertEquals(scm.revinfo(options, (), None),
                      '069c602044c5388d2d15c3f875b057c852003458')
    self.checkstdout('________ unmanaged solution; skipping .\n')


if __name__ == '__main__':
  if '-v' in sys.argv:
    logging.basicConfig(
        level=logging.DEBUG,
        format='%(asctime).19s %(levelname)s %(filename)s:'
               '%(lineno)s %(message)s')
  unittest.main()

# vim: ts=2:sw=2:tw=80:et: