def test_random_lcp_lr_matching(self):
T, n, A = 1000, 500, ['a', 'b']
m, TT = 10, 10
for _ in range(T):
text = rand.random_word(n, A)
sa = suffix_array.skew(text, n)
lcp = suffix_array.lcp_kasai(sa, text, n)
lcplr = lcp_lr.lcplr_from_lcp(lcp, n)
for _ in range(TT):
word = rand.random_word(m, A)
reference = suffix_array.contains(sa, text, word, n, m)
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, word, n, m)), list(reference))
def test_lcplr_construction(self):
text = "#banana"
n = len(text) - 1
sa = suffix_array.skew(text, n)
lcp = suffix_array.lcp_kasai(sa, text, n)
lcplr = lcp_lr.lcplr_from_lcp(lcp, n)
reference = {
(1, 2): 1,
(2, 3): 3,
(1, 3): 1,
(3, 4): 0,
(4, 5): 0,
(5, 6): 2,
(4, 6): 0,
(3, 6): 0,
(1, 6): 0,
}
self.assertEqual(lcplr, reference, "LCP-LR construction")
def test_lcplr_matching(self):
text = "#abrakadabra"
n = len(text) - 1
sa = suffix_array.skew(text, n)
lcp = suffix_array.lcp_kasai(sa, text, n)
lcplr = lcp_lr.lcplr_from_lcp(lcp, n)
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#a", n, 1)), [1,4,6,8,11], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#bra", n, 3)), [2,9], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#brak", n, 4)), [2], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#ra", n, 2)), [3,10], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#rak", n, 3)), [3], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#l", n, 1)), [], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#x", n, 1)), [], "LCP-LR matching")
self.assertEqual(list(lcp_lr.contains_with_lcplr(
sa, lcplr, text, "#xyz", n, 3)), [], "LCP-LR matching")
def lcp_lr_contains(t, w, n, m):
SA = suffix_array.skew(t, n)
LCP_LR = lcp.build_lcp_lr(lcp.kasai(SA, t, n), n)
return lcp.contains(SA, LCP_LR, t, w, n, m)
def check_lcp_lr(self, text, n, reference):
lcp_lr = lcp.build_lcp_lr(
lcp.kasai(suffix_array.skew(text, n), text, n), n)
self.assertEqual(lcp_lr, reference)