core/test/modules/BitArrayTests.cpp

module Tests;

import Core.BitArray;
import Core.Test;
import Core.Meta;
import Core.Types;

static void testSetRead() {
    Core::BitArray bits;
    bits.resize(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    Core::test(1, bits.get(0));
    Core::test(2, bits.get(1));
    Core::test(3, bits.get(2));
    Core::test(4, bits.get(3));
    Core::BitArray copy;
    copy = bits;
    Core::test(1, copy.get(0));
    Core::test(2, copy.get(1));
    Core::test(3, copy.get(2));
    Core::test(4, copy.get(3));
    Core::BitArray move = Core::move(copy);
    Core::test(1, move.get(0));
    Core::test(2, move.get(1));
    Core::test(3, move.get(2));
    Core::test(4, move.get(3));
}

static void testBigSetRead() {
    Core::BitArray bits;
    bits.resize(100, 13);
    for(size_t i = 0; i < bits.getLength(); i++) {
        bits.set(i, i);
    }
    for(size_t i = 0; i < bits.getLength(); i++) {
        Core::test(i, bits.get(i));
    }
}

static void testRandomSetReadResize() {
    constexpr int length = 100;
    u64 data[length];
    Core::BitArray bits;
    bits.resize(100, 13);
    u64 seed = 534;
    for(int k = 0; k < 20; k++) {
        for(u64 i = 0; i < bits.getLength(); i++) {
            seed = seed * 636'455 + 53'453;
            bits.set(i, seed);
            data[i] = seed & (0x1FFF);
        }
    }
    for(size_t i = 0; i < bits.getLength(); i++) {
        Core::test(data[i], bits.get(i));
    }
    bits.resize(bits.getLength(), bits.getBits() + 1);
    Core::test(14, bits.getBits());
    Core::test(100, bits.getLength());
    for(size_t i = 0; i < bits.getLength(); i++) {
        Core::test(data[i], bits.get(i));
    }
}

static void testReadOnly() {
    Core::BitArray bits;
    bits.resize(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    const Core::BitArray copy = bits;
    Core::test(1, copy.get(0));
    Core::test(2, copy.get(1));
    Core::test(3, copy.get(2));
    Core::test(4, copy.get(3));
}

static void testSelect() {
    Core::BitArray bits;
    bits.resize(90, 1);
    bits.fill(0);
    bits.set(0, 1).set(5, 1).set(20, 1).set(31, 1);
    bits.set(32, 1).set(33, 1).set(60, 1);
    Core::test(-1, bits.select(0));
    Core::test(0, bits.select(1));
    Core::test(5, bits.select(2));
    Core::test(20, bits.select(3));
    Core::test(31, bits.select(4));
    Core::test(32, bits.select(5));
    Core::test(33, bits.select(6));
    Core::test(60, bits.select(7));
    Core::test(-1, bits.select(8));
}

static void testToString1() {
    Core::BitArray bits;
    bits.resize(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    Core::testString("[1, 2, 3, 4]", bits);
}

static void testToString2() {
    Core::BitArray bits;
    bits.resize(1, 3);
    bits.set(0, 1);
    Core::testString("[1]", bits);
}

static void testToString3() {
    Core::BitArray bits;
    Core::testString("[]", bits);
}

static void testResizeExact() {
    Core::BitArray bits;
    Core::test(0, bits.getInternalByteSize());
    // the size in bytes matches the internal storage type
    size_t elements = sizeof(u64);
    bits.resize(elements, 8);
    for(size_t i = 0; i < elements; i++) {
        bits.set(i, i);
    }
    for(size_t i = 0; i < elements; i++) {
        Core::test(i, bits.get(i));
    }
    Core::test(sizeof(u64), bits.getInternalByteSize());
}

static void testInvalidArgument() {
    Core::BitArray bits;
    bits.resize(0, 5);
    Core::test(0, bits.getLength());
    Core::test(0, bits.getBits());
    bits.resize(5, 0);
    Core::test(0, bits.getLength());
    Core::test(0, bits.getBits());
    bits.resize(0, 0);
    Core::test(0, bits.getLength());
    Core::test(0, bits.getBits());
    bits.resize(1, 65);
    Core::test(1, bits.getLength());
    Core::test(64, bits.getBits());
    bits.resize(5, 68);
    Core::test(5, bits.getLength());
    Core::test(64, bits.getBits());
}

void testBitArray() {
    testBigSetRead();
    testInvalidArgument();
    testRandomSetReadResize();
    testReadOnly();
    testResizeExact();
    testSelect();
    testSetRead();
    testToString1();
    testToString2();
    testToString3();
}