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#include "kmp.h"
#include <library/cpp/testing/unittest/registar.h>
#include <util/stream/output.h>
static TVector<int> FindAll(const TString& pattern, const TString& string) {
TVector<int> result;
TKMPMatcher kmp(pattern);
const char* pResult;
const char* begin = string.begin();
const char* end = string.end();
while (kmp.SubStr(begin, end, pResult)) {
result.push_back(int(pResult - string.data()));
begin = pResult + pattern.size();
}
return result;
}
class TTestKMP: public TTestBase {
UNIT_TEST_SUITE(TTestKMP);
UNIT_TEST(Test);
UNIT_TEST(TestStream);
UNIT_TEST_SUITE_END();
public:
void Test() {
TVector<int> ans = {0, 2};
UNIT_ASSERT_EQUAL(FindAll("a", "aba"), ans);
ans = {0};
UNIT_ASSERT_EQUAL(FindAll("aba", "aba"), ans);
ans.clear();
UNIT_ASSERT_EQUAL(FindAll("abad", "aba"), ans);
ans = {0, 2};
UNIT_ASSERT_EQUAL(FindAll("ab", "abab"), ans);
}
class TKMPSimpleCallback: public TKMPStreamMatcher<int>::ICallback {
private:
int* Begin;
int* End;
int Count;
public:
TKMPSimpleCallback(int* begin, int* end)
: Begin(begin)
, End(end)
, Count(0)
{
}
void OnMatch(const int* begin, const int* end) override {
UNIT_ASSERT_EQUAL(end - begin, End - Begin);
const int* p0 = Begin;
const int* p1 = begin;
while (p0 < End) {
UNIT_ASSERT_EQUAL(*p0, *p1);
++p0;
++p1;
}
++Count;
}
int GetCount() const {
return Count;
}
};
void TestStream() {
int pattern[] = {2, 3};
int data[] = {1, 2, 3, 5, 2, 2, 3, 2, 4, 3, 2};
TKMPSimpleCallback callback(pattern, pattern + 2);
TKMPStreamMatcher<int> matcher(pattern, pattern + 2, &callback);
for (auto& i : data)
matcher.Push(i);
UNIT_ASSERT_EQUAL(2, callback.GetCount());
}
};
UNIT_TEST_SUITE_REGISTRATION(TTestKMP);
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