# 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, sys
from git.test.lib import *
from git import Git, GitCommandError

class TestGit(TestCase):
    
    @classmethod
    def setUpAll(cls):
        cls.git = Git(GIT_REPO)

    @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'],), {}))

    @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
        output = 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)
        terminating_newline = 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