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#include "catch.hpp"
#include <osmium/util/delta.hpp>
#include <cstdint>
#include <vector>
TEST_CASE("delta encode int") {
osmium::DeltaEncode<int> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.value() == 17);
REQUIRE(x.update(10) == -7);
REQUIRE(x.value() == 10);
REQUIRE(x.update(-10) == -20);
REQUIRE(x.value() == -10);
x.clear();
REQUIRE(x.value() == 0);
}
TEST_CASE("delta encode int with int32") {
osmium::DeltaEncode<int, int32_t> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.value() == 17);
REQUIRE(x.update(10) == -7);
REQUIRE(x.value() == 10);
REQUIRE(x.update(-10) == -20);
REQUIRE(x.value() == -10);
x.clear();
REQUIRE(x.value() == 0);
}
TEST_CASE("delta decode int") {
osmium::DeltaDecode<int> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.value() == 17);
REQUIRE(x.update(10) == 27);
REQUIRE(x.value() == 27);
REQUIRE(x.update(-40) == -13);
REQUIRE(x.value() == -13);
x.clear();
REQUIRE(x.update(17) == 17);
REQUIRE(x.value() == 17);
}
TEST_CASE("delta decode int with int32") {
osmium::DeltaDecode<int, int32_t> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.update(10) == 27);
REQUIRE(x.update(-40) == -13);
x.clear();
REQUIRE(x.update(17) == 17);
}
TEST_CASE("delta encode unsigned int") {
osmium::DeltaEncode<unsigned int> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.update(10) == -7);
REQUIRE(x.update(0) == -10);
}
TEST_CASE("delta decode unsigned int") {
osmium::DeltaDecode<unsigned int> x;
REQUIRE(x.update(17) == 17);
REQUIRE(x.update(10) == 27);
REQUIRE(x.update(-15) == 12);
}
TEST_CASE("delta encode and decode") {
const std::vector<int> a = { 5, -9, 22, 13, 0, 23 };
osmium::DeltaEncode<int, int> de;
std::vector<int> b;
b.reserve(a.size());
for (const int x : a) {
b.push_back(de.update(x));
}
osmium::DeltaDecode<int, int> dd;
std::vector<int> c;
c.reserve(b.size());
for (const int x : b) {
c.push_back(dd.update(x));
}
REQUIRE(a == c);
}
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