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#include "catch.hpp"
#include "duckdb/common/checksum.hpp"
#include <vector>
using namespace duckdb;
using namespace std;
#define NUM_INTS 10
TEST_CASE("Checksum tests", "[checksum]") {
// create a buffer
int vals[NUM_INTS];
for (size_t i = 0; i < NUM_INTS; i++) {
vals[i] = i + 1;
}
// verify that checksum is consistent
uint64_t c1 = Checksum((uint8_t *)vals, sizeof(int) * NUM_INTS);
uint64_t c2 = Checksum((uint8_t *)vals, sizeof(int) * NUM_INTS);
REQUIRE(c1 == c2);
// verify that checksum is sort of good
vals[3] = 1;
uint64_t c3 = Checksum((uint8_t *)vals, sizeof(int) * NUM_INTS);
REQUIRE(c1 != c3);
// verify that zeros in the input does not zero the checksum
vals[3] = 0;
uint64_t c4 = Checksum((uint8_t *)vals, sizeof(int) * NUM_INTS);
REQUIRE(c4 != 0);
// zero at a different location should change the checksum
vals[3] = 4;
vals[4] = 0;
uint64_t c5 = Checksum((uint8_t *)vals, sizeof(int) * NUM_INTS);
REQUIRE(c4 != c5);
REQUIRE(c1 != c4);
REQUIRE(c1 != c5);
}
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