# Copyright 2018 Joshua Bronson. All Rights Reserved.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

Test script for :func:`bidict.namedbidict`::

    >>> from bidict import namedbidict
    >>> ElementMap = namedbidict('ElementMap', 'symbol', 'name')
    >>> noble_gases = ElementMap(He='helium')
    >>> noble_gases.name_for['He']
    'helium'
    >>> noble_gases.symbol_for['helium']
    'He'
    >>> noble_gases.name_for['Ne'] = 'neon'
    >>> del noble_gases.symbol_for['helium']
    >>> noble_gases
    ElementMap({'Ne': 'neon'})

``.inv`` still works too::

    >>> noble_gases.inv
    ElementMap({'neon': 'Ne'})
    >>> noble_gases.inv.name_for['Ne']
    'neon'
    >>> noble_gases.inv.symbol_for['neon']
    'Ne'

Pickling works::

    >>> from pickle import dumps, loads
    >>> loads(dumps(noble_gases)) == noble_gases
    True

Invalid names are rejected::

    >>> invalid = namedbidict('0xabad1d3a', 'keys', 'vals')
    Traceback (most recent call last):
        ...
    ValueError: "0xabad1d3a" does not match pattern ^[a-zA-Z][a-zA-Z0-9_]*$

Comparison works as expected::

    >>> from bidict import bidict
    >>> noble_gases2 = ElementMap({'Ne': 'neon'})
    >>> noble_gases2 == noble_gases
    True
    >>> noble_gases2 == bidict(noble_gases)
    True
    >>> noble_gases2 == dict(noble_gases)
    True
    >>> noble_gases2['Rn'] = 'radon'
    >>> noble_gases2 == noble_gases
    False
    >>> noble_gases2 != noble_gases
    True
    >>> noble_gases2 != bidict(noble_gases)
    True
    >>> noble_gases2 != dict(noble_gases)
    True

Test ``base_type`` keyword arg::

    >>> from bidict import frozenbidict
    >>> ElMap = namedbidict('ElMap', 'sym', 'el', base_type=frozenbidict)
    >>> noble = ElMap(He='helium')
    >>> hash(noble) is not 'an exception'
    True
    >>> noble['C'] = 'carbon'
    Traceback (most recent call last):
        ...
    TypeError...