--- /dev/null
+import pytest
+import string
+
+from szyfrow.keyword_cipher import *
+from szyfrow.support.utilities import *
+
+def test_cipher_alphabet():
+ assert keyword_cipher_alphabet_of('bayes') == 'bayescdfghijklmnopqrtuvwxz'
+ assert keyword_cipher_alphabet_of('bayes', KeywordWrapAlphabet.from_a) == 'bayescdfghijklmnopqrtuvwxz'
+ assert keyword_cipher_alphabet_of('bayes', KeywordWrapAlphabet.from_last) == 'bayestuvwxzcdfghijklmnopqr'
+ assert keyword_cipher_alphabet_of('bayes', KeywordWrapAlphabet.from_largest) == 'bayeszcdfghijklmnopqrtuvwx'
+
+
+def test_encipher_message():
+ enciphered = keyword_encipher('test message', 'bayes')
+ expected = 'rsqr ksqqbds'
+ assert enciphered == expected
+
+ enciphered = keyword_encipher('test message', 'bayes', KeywordWrapAlphabet.from_a)
+ expected = 'rsqr ksqqbds'
+ assert enciphered == expected
+
+ enciphered = keyword_encipher('test message', 'bayes', KeywordWrapAlphabet.from_last)
+ expected = 'lskl dskkbus'
+ assert enciphered == expected
+
+ enciphered = keyword_encipher('test message', 'bayes', KeywordWrapAlphabet.from_largest)
+ expected = 'qspq jsppbcs'
+ assert enciphered == expected
+
+
+def test_decipher_message():
+ plaintext = 'test message'
+ for key in ['bayes', 'samplekey']:
+ for wrap in KeywordWrapAlphabet:
+ enciphered = keyword_encipher(plaintext, key, wrap)
+ deciphered = keyword_decipher(enciphered, key, wrap)
+ assert deciphered == plaintext
+
+
+def test_keyword_break():
+ plaintext = 'this is a test message for the keyword breaking routine'
+ expected_key = 'elephant'
+ expected_wrap = KeywordWrapAlphabet.from_last
+ ciphertext = keyword_encipher(plaintext, expected_key, expected_wrap)
+ (key, wrap), score = keyword_break(ciphertext,
+ wordlist=['cat', 'elephant', 'kangaroo'])
+ assert key == expected_key
+ assert wrap == expected_wrap
+ assert score == pytest.approx(Pletters(sanitise(plaintext)))
+
+def test_keyword_break_mp():
+ plaintext = 'this is a test message for the keyword breaking routine'
+ expected_key = 'elephant'
+ expected_wrap = KeywordWrapAlphabet.from_last
+ ciphertext = keyword_encipher(plaintext, expected_key, expected_wrap)
+ (key, wrap), score = keyword_break_mp(ciphertext,
+ wordlist=['cat', 'elephant', 'kangaroo'])
+ assert key == expected_key
+ assert wrap == expected_wrap
+ assert score == pytest.approx(Pletters(sanitise(plaintext)))
+
+
+# def test_simulated_annealing_break():
+# # random.seed(0)
+# plaintext = '''You will rejoice to hear that no disaster has accompanied the
+# commencement of an enterprise which you have regarded with such evil
+# forebodings. I arrived here yesterday, and my first task is to assure
+# my dear sister of my welfare and increasing confidence in the success
+# of my undertaking.
+
+# I am already far north of London, and as I walk in the streets of
+# Petersburgh, I feel a cold northern breeze play upon my cheeks, which
+# braces my nerves and fills me with delight. Do you understand this
+# feeling? This breeze, which has travelled from the regions towards
+# which I am advancing, gives me a foretaste of those icy climes.
+# Inspirited by this wind of promise, my daydreams become more fervent
+# and vivid.
+
+# I try in vain to be persuaded that the pole is the seat of
+# frost and desolation; it ever presents itself to my imagination as the
+# region of beauty and delight. There, Margaret, the sun is for ever
+# visible, its broad disk just skirting the horizon and diffusing a
+# perpetual splendour. There—for with your leave, my sister, I will put
+# some trust in preceding navigators—there snow and frost are banished;
+# and, sailing over a calm sea, we may be wafted to a land surpassing in
+# wonders and in beauty every region hitherto discovered on the habitable
+# globe.
+
+# Its productions and features may be without example, as the
+# phenomena of the heavenly bodies undoubtedly are in those undiscovered
+# solitudes. What may not be expected in a country of eternal light? I
+# may there discover the wondrous power which attracts the needle and may
+# regulate a thousand celestial observations that require only this
+# voyage to render their seeming eccentricities consistent for ever. I
+# shall satiate my ardent curiosity with the sight of a part of the world
+# never before visited, and may tread a land never before imprinted by
+# the foot of man. These are my enticements, and they are sufficient to
+# conquer all fear of danger or death and to induce me to commence this
+# laborious voyage with the joy a child feels when he embarks in a little
+# boat, with his holiday mates, on an expedition of discovery up his
+# native river.
+
+# But supposing all these conjectures to be false, you cannot contest the
+# inestimable benefit which I shall confer on all mankind, to the last
+# generation, by discovering a passage near the pole to those countries, to
+# reach which at present so many months are requisite; or by ascertaining the
+# secret of the magnet, which, if at all possible, can only be effected by an
+# undertaking such as mine.'''
+
+# expected_key = keyword_cipher_alphabet_of('abced')
+# ciphertext = keyword_encipher(sanitise(plaintext), expected_key)
+# expected_score = Ptrigrams(sanitise(plaintext))
+# actual_key, actual_score = monoalphabetic_sa_break(ciphertext,
+# plain_alphabet=string.ascii_lowercase,
+# cipher_alphabet=string.ascii_lowercase,
+# workers=10, max_iterations=1000,
+# fitness=Ptrigrams
+# )
+# assert expected_key == actual_key
+# assert expected_score == pytest.approx(actual_score)
projects / szyfrow.git / blobdiff