# The MIT License (MIT)

# Copyright (c) 2015 Yanzheng Li

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


## -----------------------------------------------------------------------------

def test_none_type_representation():
    print None

    a = None
    print a

    b = not None
    print b

    c = not not None
    print c

## -----------------------------------------------------------------------------

def test_none_type_logic():
    if None:
        print "This shouldn't be said"

    if not None:
        print 'This instead, can be said'

## -----------------------------------------------------------------------------

def test_none_type_hash():
    print None.__hash__() > 0

## -----------------------------------------------------------------------------

def test_none_equality():
    print None == None
    print None != None
    print None == True
    print None == False

## -----------------------------------------------------------------------------

test_none_type_representation()
test_none_type_logic()
test_none_type_hash()
test_none_equality()

## -----------------------------------------------------------------------------
