gplib/tests/partition_test.cpp

#include "gp/containers/array.hpp"
#include "gp/containers/vector.hpp"
#include "gp/algorithms/partition.hpp"
#include "test_scaffold.h"
#include "allocator.hpp"
#include <memory>

#include <random>
#include <iostream>
#include <string>
#include <algorithm>

typedef std::mt19937_64 cheap_rand;



struct partition_array_test : public test_scaffold {
	uint32_t seed;

	partition_array_test() {
		name = __FILE__ ":1_seed";
		seed = std::random_device{}();
		name += std::to_string(seed);
	}

	virtual int run() {
		cheap_rand setter(seed);

        for(int i = 0; i < 250; ++i) {
            gp::array<uint32_t, 200> ary;
            for(auto& elem : ary) {
                elem = setter();
            }

            auto pivot = gp::hoare_partition(ary.begin(), ary.end(), [](const auto& v){return v % 2;});

            for(auto it = ary.begin(); it != pivot;++it) {
                gp_config::assertion(!!(*it % 2), "partition failed");
            }

            for(auto it = pivot; it != ary.end();++it) {
                gp_config::assertion(!(*it % 2), "partition failed");
            }
        }

        return 0;
    }
};

append_test dummy_s5f468e43(new partition_array_test{});


struct partition_array_lomuto_test : public test_scaffold {
	uint32_t seed;

	partition_array_lomuto_test() {
		name = __FILE__ ":2_seed";
		seed = std::random_device{}();
		name += std::to_string(seed);
	}

	virtual int run() {
		cheap_rand setter(seed);

        for(int i = 0; i < 250; ++i) {
            gp::array<uint32_t, 200> ary;
            for(auto& elem : ary) {
                elem = setter();
            }

            auto pivot = gp::lomuto_partition(ary.begin(), ary.end(), [](const auto& v){return v % 2;});

            for(auto it = ary.begin(); it != pivot;++it) {
                gp_config::assertion(!!(*it % 2), "partition failed");
            }

            for(auto it = pivot; it != ary.end();++it) {
                gp_config::assertion(!(*it % 2), "partition failed");
            }
        }

        return 0;
    }
};

append_test dummy_lcvudg8e43(new partition_array_lomuto_test{});