Jungfraujoch/tests/HKLKeyTest.cpp

// SPDX-FileCopyrightText: 2024 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#include <catch2/catch_all.hpp>

#include "../common/hkl_key.h"

TEST_CASE("HKL key round-trip", "[hkl_key]") {
    struct Case { int64_t h, k, l; };
    const Case cases[] = {
        {0, 0, 0},
        {1, -2, 3},
        {-511, 0, 511},
        {512 - 1, -(512 - 1), 7},
        {-128, 255, -7}
    };

    for (const auto& c : cases) {
        const uint64_t key = hkl_key(c.h, c.k, c.l);
        int64_t h = 0, k = 0, l = 0;
        hkl_from_key(key, h, k, l);

        CHECK(h == c.h);
        CHECK(k == c.k);
        CHECK(l == c.l);
    }
}

TEST_CASE("HKL key boundaries", "[hkl_key]") {
    const int64_t min = -512;
    const int64_t max = 511;

    const uint64_t key = hkl_key(min, 0, max);
    int64_t h = 0, k = 0, l = 0;
    hkl_from_key(key, h, k, l);

    CHECK(h == min);
    CHECK(k == 0);
    CHECK(l == max);
}