gaming-core/tests/BitArrayTests.cpp

#include "tests/BitArrayTests.h"
#include "data/BitArray.h"
#include "tests/Test.h"
#include "utils/StringBuffer.h"

typedef StringBuffer<50> String;

static void testSetRead(Test& test) {
    BitArray bits(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    test.checkEqual(1, bits.get(0), "set and read correct value 1");
    test.checkEqual(2, bits.get(1), "set and read correct value 2");
    test.checkEqual(3, bits.get(2), "set and read correct value 3");
    test.checkEqual(4, bits.get(3), "set and read correct value 4");
}

static void testBigSetRead(Test& test) {
    BitArray bits(100, 13);
    for(int i = 0; i < bits.getLength(); i++) {
        bits.set(i, i);
    }
    for(int i = 0; i < bits.getLength(); i++) {
        test.checkEqual(i, bits.get(i),
                        "set and read correct value over long array");
    }
}

static void testRandomSetReadResize(Test& test) {
    const int length = 100;
    int data[length];
    BitArray bits(100, 13);
    int seed = 534;
    for(int k = 0; k < 20; k++) {
        for(int i = 0; i < bits.getLength(); i++) {
            seed = seed * 636455 + 53453;
            bits.set(i, seed & (0x1FFF));
            data[i] = seed & (0x1FFF);
        }
    }
    for(int i = 0; i < bits.getLength(); i++) {
        test.checkEqual(data[i], bits.get(i),
                        "set and read correct value with random input");
    }
    bits.resize(bits.getLength(), bits.getBits() + 1);
    test.checkEqual(14, bits.getBits(), "corrects bits after resize");
    test.checkEqual(100, bits.getLength(), "correct length after resize");
    for(int i = 0; i < bits.getLength(); i++) {
        test.checkEqual(
            data[i], bits.get(i),
            "set and read correct value with random input after resize");
    }
}

static void testReadOnly(Test& test) {
    BitArray bits(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    const BitArray bits2 = bits;
    test.checkEqual(1, bits2.get(0), "can read from const 1");
    test.checkEqual(2, bits2.get(1), "can read from const 2");
    test.checkEqual(3, bits2.get(2), "can read from const 3");
    test.checkEqual(4, bits2.get(3), "can read from const 4");
}

static void testSelect(Test& test) {
    BitArray bits(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);
    test.checkEqual(-1, bits.select(-1), "select -1 bit");
    test.checkEqual(-1, bits.select(0), "select 0 bit");
    test.checkEqual(0, bits.select(1), "select 1 bit");
    test.checkEqual(5, bits.select(2), "select 2 bit");
    test.checkEqual(20, bits.select(3), "select 3 bit");
    test.checkEqual(31, bits.select(4), "select 4 bit");
    test.checkEqual(32, bits.select(5), "select 5 bit");
    test.checkEqual(33, bits.select(6), "select 6 bit");
    test.checkEqual(60, bits.select(7), "select 7 bit");
    test.checkEqual(-1, bits.select(8), "select 8 bit");
}

static void testToString1(Test& test) {
    BitArray bits(4, 3);
    bits.set(0, 1).set(1, 2).set(2, 3).set(3, 4);
    test.checkEqual(String("[1, 2, 3, 4]"), String(bits),
                    "bit array to string 1");
}

static void testToString2(Test& test) {
    BitArray bits(1, 3);
    bits.set(0, 1);
    test.checkEqual(String("[1]"), String(bits), "bit array to string 1");
}

void BitArrayTests::test() {
    Test test("BitArray");
    testSetRead(test);
    testBigSetRead(test);
    testRandomSetReadResize(test);
    testReadOnly(test);
    testSelect(test);
    testToString1(test);
    testToString2(test);
    test.finalize();
}