# test_config.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

from git.test.lib import TestBase, fixture_path
import StringIO
from git.config import *
from copy import copy
from ConfigParser import NoSectionError

class TestConfig(TestBase):
    
    def _to_memcache(self, file_path):
        fp = open(file_path, "r")
        sio = StringIO.StringIO(fp.read())
        sio.name = file_path
        return sio
        
    def _parsers_equal_or_raise(self, lhs, rhs):
        pass
        
    def test_read_write(self):
        # writer must create the exact same file as the one read before
        for filename in ("git_config", "git_config_global"):
            file_obj = self._to_memcache(fixture_path(filename))
            file_obj_orig = copy(file_obj)
            w_config = GitConfigParser(file_obj, read_only = False)
            w_config.read()                 # enforce reading
            assert w_config._sections
            w_config.write()                # enforce writing
            assert file_obj.getvalue() == file_obj_orig.getvalue()
            
            # creating an additional config writer must fail due to exclusive access
            self.failUnlessRaises(IOError, GitConfigParser, file_obj, read_only = False)
            
            # should still have a lock and be able to make changes
            assert w_config._lock._has_lock()
            
            # changes should be written right away
            sname = "my_section"
            oname = "mykey"
            val = "myvalue"
            w_config.add_section(sname)
            assert w_config.has_section(sname)
            w_config.set(sname, oname, val)
            assert w_config.has_option(sname,oname)
            assert w_config.get(sname, oname) == val
            
            sname_new = "new_section"
            oname_new = "new_key"
            ival = 10
            w_config.set_value(sname_new, oname_new, ival)
            assert w_config.get_value(sname_new, oname_new) == ival
            
            file_obj.seek(0)
            r_config = GitConfigParser(file_obj, read_only=True)
            assert r_config.has_section(sname)
            assert r_config.has_option(sname, oname)
            assert r_config.get(sname, oname) == val
            
        # END for each filename
        
    def test_base(self):
        path_repo = fixture_path("git_config")
        path_global = fixture_path("git_config_global")
        r_config = GitConfigParser([path_repo, path_global], read_only=True)
        assert r_config.read_only
        num_sections = 0
        num_options = 0
        
        # test reader methods
        assert r_config._is_initialized == False
        for section in r_config.sections():
            num_sections += 1
            for option in r_config.options(section):
                num_options += 1
                val = r_config.get(section, option)
                val_typed = r_config.get_value(section, option)
                assert isinstance(val_typed, (bool, long, float, basestring))
                assert val
                assert "\n" not in option
                assert "\n" not in val
                
                # writing must fail
                self.failUnlessRaises(IOError, r_config.set, section, option, None)
                self.failUnlessRaises(IOError, r_config.remove_option, section, option )
            # END for each option
            self.failUnlessRaises(IOError, r_config.remove_section, section)
        # END for each section 
        assert num_sections and num_options
        assert r_config._is_initialized == True
        
        # get value which doesnt exist, with default
        default = "my default value"
        assert r_config.get_value("doesnt", "exist", default) == default
        
        # it raises if there is no default though
        self.failUnlessRaises(NoSectionError, r_config.get_value, "doesnt", "exist")
        
        
