#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
# 
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license.  The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
# 
# Author: Enthought, Inc.
# Description: <Enthought naming package component>
#------------------------------------------------------------------------------
""" Tests the default directory context. """


# Enthought library imports.
from enthought.naming.api import *

# Local imports.
from context_test_case import ContextTestCase


class DirContextTestCase(ContextTestCase):
    """ Tests the default directory context. """

    ###########################################################################
    # 'ContextTestCase' interface.
    ###########################################################################

    def create_context(self):
        """ Creates the context that we are testing. """

        return DirContext()

    ###########################################################################
    # Tests.
    ###########################################################################

    def test_get_attributes(self):
        """ get attributes """

        # Convenience.
        context = self.context
        sub = self.context.lookup('sub')
        self.assert_(isinstance(sub, DirContext))

        #### Generic name resolution tests ####

        # Non-existent name.
        self.failUnlessRaises(NameNotFoundError, context.get_attributes, 'x')

        # Attempt to resolve via a non-existent context.
        self.failUnlessRaises(NameNotFoundError, context.get_attributes, 'x/a')

        # Attempt to resolve via an existing name that is not a context.
        context.bind('sub/a', 1)
        self.assertEqual(len(sub.list_bindings('')), 1)
        self.failUnlessRaises(NotContextError,context.get_attributes,'sub/a/x')

        #### Operation specific tests ####

        # Attributes of the root context.
        attributes = self.context.get_attributes('')
        self.assertEqual(len(attributes), 0)

        # Attributes of a sub-context.
        attributes = context.get_attributes('sub')
        self.assertEqual(len(attributes), 0)

        return

    def test_set_get_attributes(self):
        """ get and set attributes """

        defaults = {'colour' : 'blue'}
        
        # Convenience.
        context = self.context
        sub = self.context.lookup('sub')
        self.assert_(isinstance(sub, DirContext))

        #### Generic name resolution tests ####
        
        # Non-existent name.
        self.failUnlessRaises(
            NameNotFoundError, context.set_attributes, 'x', defaults
        )

        # Attempt to resolve via a non-existent context.
        self.failUnlessRaises(
            NameNotFoundError, context.set_attributes, 'x/a', defaults
        )

        # Attempt to resolve via an existing name that is not a context.
        context.bind('sub/a', 1)
        self.assertEqual(len(sub.list_bindings('')), 1)
        self.failUnlessRaises(
            NotContextError, context.set_attributes, 'sub/a/xx', defaults
        )

        #### Operation specific tests ####
        
        # Attributes of the root context.
        attributes = self.context.get_attributes('')
        self.assertEqual(len(attributes), 0)

        # Set the attributes.
        context.set_attributes('', defaults)
        attributes = context.get_attributes('')
        self.assertEqual(len(attributes), 1)
        self.assertEqual(attributes['colour'], 'blue')

        # Attributes of a sub-context.
        attributes = context.get_attributes('sub')
        self.assertEqual(len(attributes), 0)

        # Set the attributes.
        context.set_attributes('sub', defaults)
        attributes = context.get_attributes('sub')
        self.assertEqual(len(attributes), 1)
        self.assertEqual(attributes['colour'], 'blue')

        return
    
#### EOF ######################################################################