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# Copyright (C) 2012 by Brian Neal.
# This file is part of Py-Enigma, the Enigma Machine simulation.
# Py-Enigma is released under the MIT License (see License.txt).
"""Tests for the Plugboard class."""
import unittest
from ..plugboard import Plugboard, PlugboardError
class PlugboardTestCase(unittest.TestCase):
def test_bad_settings(self):
# too many
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='AB CD EF GH IJ KL MN OP QR ST UV')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'18/26 17/4 21/6 3/16 19/14 22/7 8/1 12/25 5/9 10/15 2/20')
# duplicate
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='AB CD EF GH IJ KL MN OF QR ST')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='AB CD EF GH IJ KL MN FP QR ST')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'18/26 17/4 21/6 3/16 19/14 22/3 8/1 12/25')
# invalid
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='A2 CD EF GH IJ KL MN FP QR ST')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='AB CD EF *H IJ KL MN FP QR ST')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='ABCD EF GH IJKLMN OP')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='A-D EF GH OP')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='A')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='9')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'1*/26 17/4 21/6 3/16 19/14 22/3 8/1 12/25')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'18/26 17/4 2A/6 3/16 19/14 22/3 8/1 12/25')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'100/2')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
'100')
self.assertRaises(PlugboardError, Plugboard.from_key_sheet,
settings='T/C')
def test_valid_settings(self):
# these should be valid settings and should not raise
p = Plugboard()
p = Plugboard(None)
p = Plugboard(wiring_pairs=None)
p = Plugboard(wiring_pairs=[])
p = Plugboard([])
p = Plugboard.from_key_sheet('AB CD EF GH IJ KL MN OP QR ST')
p = Plugboard.from_key_sheet('CD EF GH IJ KL MN OP QR ST')
p = Plugboard.from_key_sheet('EF GH IJ KL MN OP QR ST')
p = Plugboard.from_key_sheet(' GH ')
p = Plugboard.from_key_sheet('18/26 17/4 21/6 3/16 19/14 22/7 8/1 12/25'
' 5/9 10/15')
p = Plugboard.from_key_sheet('18/26 17/4')
p = Plugboard.from_key_sheet(' 18/26 ')
p = Plugboard.from_key_sheet()
p = Plugboard.from_key_sheet('')
p = Plugboard.from_key_sheet(None)
def test_default_wiring(self):
p = Plugboard()
for n in range(26):
self.assertEqual(n, p.signal(n))
def test_wiring(self):
settings =['AB CD EF GH IJ KL MN OP QR ST',
'1/2 3/4 5/6 7/8 9/10 11/12 13/14 15/16 17/18 19/20']
for setting in settings:
p = Plugboard.from_key_sheet(setting)
for n in range(26):
if n < 20:
if n % 2 == 0:
self.assertEqual(p.signal(n), n + 1)
else:
self.assertEqual(p.signal(n), n - 1)
else:
self.assertEqual(n, p.signal(n))
def test_wiring2(self):
stecker='AV BS CG DL FU HZ IN KM OW RX'
wiring = {}
pairs = stecker.split()
for p in pairs:
m, n = ord(p[0]) - ord('A'), ord(p[1]) - ord('A')
wiring[m] = n
wiring[n] = m
p = Plugboard.from_key_sheet(stecker)
for n in range(26):
if n in wiring:
self.assertEqual(p.signal(n), wiring[n])
else:
self.assertEqual(p.signal(n), n)
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