# test_git.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php

import os
import mock
from git.test.lib import (TestBase,
                            patch,
                            raises,
                            assert_equal,
                            assert_true,
                            assert_match,
                            fixture_path)
from git import (Git,
                    GitCommandError)


class TestGit(TestBase):

    @classmethod
    def setUpClass(cls):
        super(TestGit, cls).setUpClass()
        cls.git = Git(cls.rorepo.working_dir)

    @patch.object(Git, 'execute')
    def test_call_process_calls_execute(self, git):
        git.return_value = ''
        self.git.version()
        assert_true(git.called)
        assert_equal(git.call_args, ((['git', 'version'],), {}))

    def test_call_unpack_args_unicode(self):
        args = Git._Git__unpack_args(u'Unicode' + unichr(40960))
        assert_equal(args, ['Unicode\xea\x80\x80'])

    def test_call_unpack_args(self):
        args = Git._Git__unpack_args(['git', 'log', '--', u'Unicode' + unichr(40960)])
        assert_equal(args, ['git', 'log', '--', 'Unicode\xea\x80\x80'])

    @raises(GitCommandError)
    def test_it_raises_errors(self):
        self.git.this_does_not_exist()

    def test_it_transforms_kwargs_into_git_command_arguments(self):
        assert_equal(["-s"], self.git.transform_kwargs(**{'s': True}))
        assert_equal(["-s5"], self.git.transform_kwargs(**{'s': 5}))

        assert_equal(["--max-count"], self.git.transform_kwargs(**{'max_count': True}))
        assert_equal(["--max-count=5"], self.git.transform_kwargs(**{'max_count': 5}))

        assert_equal(["-s", "-t"], self.git.transform_kwargs(**{'s': True, 't': True}))

    def test_it_executes_git_to_shell_and_returns_result(self):
        assert_match('^git version [\d\.]{2}.*$', self.git.execute(["git", "version"]))

    def test_it_accepts_stdin(self):
        filename = fixture_path("cat_file_blob")
        fh = open(filename, 'r')
        assert_equal("70c379b63ffa0795fdbfbc128e5a2818397b7ef8",
                     self.git.hash_object(istream=fh, stdin=True))
        fh.close()

    @patch.object(Git, 'execute')
    def test_it_ignores_false_kwargs(self, git):
        # this_should_not_be_ignored=False implies it *should* be ignored
        self.git.version(pass_this_kwarg=False)
        assert_true("pass_this_kwarg" not in git.call_args[1])

    def test_persistent_cat_file_command(self):
        # read header only
        import subprocess as sp
        hexsha = "b2339455342180c7cc1e9bba3e9f181f7baa5167"
        g = self.git.cat_file(batch_check=True, istream=sp.PIPE, as_process=True)
        g.stdin.write("b2339455342180c7cc1e9bba3e9f181f7baa5167\n")
        g.stdin.flush()
        obj_info = g.stdout.readline()

        # read header + data
        g = self.git.cat_file(batch=True, istream=sp.PIPE, as_process=True)
        g.stdin.write("b2339455342180c7cc1e9bba3e9f181f7baa5167\n")
        g.stdin.flush()
        obj_info_two = g.stdout.readline()
        assert obj_info == obj_info_two

        # read data - have to read it in one large chunk
        size = int(obj_info.split()[2])
        data = g.stdout.read(size)
        g.stdout.read(1)

        # now we should be able to read a new object
        g.stdin.write("b2339455342180c7cc1e9bba3e9f181f7baa5167\n")
        g.stdin.flush()
        assert g.stdout.readline() == obj_info

        # same can be achived using the respective command functions
        hexsha, typename, size = self.git.get_object_header(hexsha)
        hexsha, typename_two, size_two, data = self.git.get_object_data(hexsha)
        assert typename == typename_two and size == size_two

    def test_version(self):
        v = self.git.version_info
        assert isinstance(v, tuple)
        for n in v:
            assert isinstance(n, int)
        #END verify number types

    def test_cmd_override(self):
        prev_cmd = self.git.GIT_PYTHON_GIT_EXECUTABLE
        try:
            # set it to something that doens't exist, assure it raises
            type(self.git).GIT_PYTHON_GIT_EXECUTABLE = os.path.join("some", "path", "which", "doesn't", "exist", "gitbinary")
            self.failUnlessRaises(OSError, self.git.version)
        finally:
            type(self.git).GIT_PYTHON_GIT_EXECUTABLE = prev_cmd
        #END undo adjustment

    def test_options_are_passed_to_git(self):
        # This work because any command after git --version is ignored
        git_version = self.git(version=True).NoOp()
        git_command_version = self.git.version()
        self.assertEquals(git_version, git_command_version)

    def test_single_char_git_options_are_passed_to_git(self):
        input_value = 'TestValue'
        output_value = self.git(c='user.name={}'.format(input_value)).config('--get', 'user.name')
        self.assertEquals(input_value, output_value)

    def test_change_to_transform_kwargs_does_not_break_command_options(self):
        self.git.log(n=1)

    def test_env_vars_passed_to_git(self):
        editor = 'non_existant_editor'
        with mock.patch.dict('os.environ', {'GIT_EDITOR': editor}):
            assert self.git.var("GIT_EDITOR") == editor