def test__word_ladder_fuzz():
with open('words5.dict') as f:
words = f.readlines()
words = list(set([word.strip() for word in words]))
for i in range(1000000):
word1 = random.choice(words)
word2 = random.choice(words)
res1 = _adjacent(word1, word2)
res2 = _adjacent(word2, word1)
assert res1 == res2 or res1 is res2
def test__word_ladder_2():
assert not _adjacent('stone', 'stone1')
def test__word_ladder_1():
assert not _adjacent('stone', 'money')
def test__word_ladder_5():
assert _adjacent('stone', 'shone')
def test__word_ladder_4():
assert _adjacent('stone', 'stony')
def test__word_ladder_1b():
assert not _adjacent('money', 'stone')
def test__word_ladder_7b():
assert not _adjacent('shone', '')
def test__word_ladder_7():
assert not _adjacent('', 'shone')