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Fr4nz D13trich 2025-11-22 13:58:55 +01:00
parent 4af19165ec
commit 68073add76
12458 changed files with 12350765 additions and 2 deletions
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91
libs/base/base_tests/suffix_array_tests.cpp Normal file
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#include "testing/testing.hpp"
#include "base/suffix_array.hpp"
#include <cstring>
#include <string>
#include <vector>
using namespace base;
using namespace std;
#define TEST_STR_EQUAL(X, Y, msg) TEST_EQUAL(string(X), string(Y), msg)
namespace
{
UNIT_TEST(Skew_Smoke)
{
Skew(0, nullptr /* s */, nullptr /* sa */);
}
UNIT_TEST(Skew_Simple)
{
{
string const s;
vector<size_t> pos;
Skew(s, pos);
TEST_EQUAL(pos.size(), s.size(), ());
}
{
string const s = "a";
vector<size_t> pos;
Skew(s, pos);
TEST_EQUAL(pos.size(), s.size(), ());
TEST_EQUAL(pos[0], 0, ());
}
{
string const s = "aaaa";
vector<size_t> pos;
Skew(s, pos);
TEST_EQUAL(pos.size(), s.size(), ());
TEST_EQUAL(pos[0], 3, ());
TEST_EQUAL(pos[1], 2, ());
TEST_EQUAL(pos[2], 1, ());
TEST_EQUAL(pos[3], 0, ());
}
for (size_t length = 0; length < 100; ++length)
{
string const s(length, 'a');
vector<size_t> pos;
Skew(s, pos);
TEST_EQUAL(pos.size(), s.size(), ());
for (size_t i = 0; i < pos.size(); ++i)
TEST_EQUAL(pos[i], pos.size() - i - 1, ());
}
for (size_t length = 0; length < 100; ++length)
{
string const s(length, '\0');
vector<size_t> pos;
Skew(s, pos);
TEST_EQUAL(pos.size(), s.size(), ());
for (size_t i = 0; i < pos.size(); ++i)
TEST_EQUAL(pos[i], pos.size() - i - 1, ());
}
}
UNIT_TEST(Skew_Classic)
{
char const * s = "mississippi";
size_t const n = strlen(s);
TEST_EQUAL(n, 11, ());
vector<size_t> pos(n);
Skew(n, reinterpret_cast<uint8_t const *>(s), pos.data());
TEST_STR_EQUAL("i", s + pos[0], ());
TEST_STR_EQUAL("ippi", s + pos[1], ());
TEST_STR_EQUAL("issippi", s + pos[2], ());
TEST_STR_EQUAL("ississippi", s + pos[3], ());
TEST_STR_EQUAL("mississippi", s + pos[4], ());
TEST_STR_EQUAL("pi", s + pos[5], ());
TEST_STR_EQUAL("ppi", s + pos[6], ());
TEST_STR_EQUAL("sippi", s + pos[7], ());
TEST_STR_EQUAL("sissippi", s + pos[8], ());
TEST_STR_EQUAL("ssippi", s + pos[9], ());
TEST_STR_EQUAL("ssissippi", s + pos[10], ());
}
} // namespace