[Zodb-checkins] CVS: Zope3/src/ZConfig/tests - test_cfgimports.py:1.1

[Fred L. Drake, Jr.]

Update of /cvs-repository/Zope3/src/ZConfig/tests
In directory cvs.zope.org:/tmp/cvs-serv2255/tests

Added Files:
	test_cfgimports.py 
Log Message:
Implementation and tests for %import keyword in the configuration language.
This allows specific configurations to load new implementations of existing
abstract types without having to modify the basic schema.
We expect this to be useful to support (for example) add-on storage and
database types, logging handlers, or even server components.


=== Added File Zope3/src/ZConfig/tests/test_cfgimports.py ===
##############################################################################
#
# Copyright (c) 2003 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Tests of the %import mechanism.

$Id: test_cfgimports.py,v 1.1 2003/10/03 20:01:57 fdrake Exp $
"""

import unittest

from StringIO import StringIO

import ZConfig
import ZConfig.tests.support


class TestImportFromConfiguration(ZConfig.tests.support.TestBase):

    def test_simple_import(self):
        schema = self.load_schema_text("<schema/>")
        loader = self.create_config_loader(schema)
        config, _ = loader.loadFile(
            StringIO("%import ZConfig.tests.library.widget\n"))
        # make sure we now have a "private" schema object; the only
        # way to get it is from the loader itself
        self.assert_(schema is not loader.schema)
        # make sure component types are only found on the private schema:
        loader.schema.gettype("widget-b")
        self.assertRaises(ZConfig.SchemaError, schema.gettype, "widget-b")

    def test_repeated_import(self):
        schema = self.load_schema_text("<schema/>")
        loader = self.create_config_loader(schema)
        config, _ = loader.loadFile(
            StringIO("%import ZConfig.tests.library.widget\n"
                     "%import ZConfig.tests.library.widget\n"))

    def test_missing_import(self):
        schema = self.load_schema_text("<schema/>")
        loader = self.create_config_loader(schema)
        self.assertRaises(ZConfig.SchemaError, loader.loadFile,
                          StringIO("%import ZConfig.tests.missing\n"))


def test_suite():
    return unittest.makeSuite(TestImportFromConfiguration)