gaming-core/tests/RingBufferTests.cpp

#include "tests/RingBufferTests.h"
#include "data/RingBuffer.h"
#include "tests/Test.h"

static void testReadAndWrite(Test& test) {
    RingBuffer<int, 5> buffer;
    test.checkEqual(false, buffer.canRead(), "no read from empty buffer");
    buffer.write(4);
    test.checkEqual(true, buffer.canRead(), "can read from buffer with value");
    test.checkEqual(4, buffer.read(), "can read value");
    test.checkEqual(false, buffer.canRead(), "value is gone after read");
}

static void testOverflow(Test& test) {
    RingBuffer<int, 3> buffer;
    bool r1 = buffer.write(1);
    bool r2 = buffer.write(2);
    bool r3 = buffer.write(3);
    bool r4 = buffer.write(4);
    bool r5 = buffer.write(5);
    test.checkEqual(false, r1, "check buffer write return value 1");
    test.checkEqual(false, r2, "check buffer write return value 2");
    test.checkEqual(false, r3, "check buffer write return value 3");
    test.checkEqual(true, r4, "check buffer write return value 4");
    test.checkEqual(true, r5, "check buffer write return value 5");
    test.checkEqual(1, buffer.read(),
                    "can read value from overflowed buffer 1");
    test.checkEqual(2, buffer.read(),
                    "can read value from overflowed buffer 2");
    test.checkEqual(3, buffer.read(),
                    "can read value from overflowed buffer 3");
    test.checkEqual(false, buffer.canRead(), "values are gone after full read");
}

static void testRefill(Test& test) {
    RingBuffer<int, 3> buffer;
    buffer.write(1);
    buffer.write(2);
    buffer.write(3);
    buffer.write(4);
    test.checkEqual(true, buffer.canRead(), "values are ready to be read 2");
    test.checkEqual(1, buffer.read(),
                    "can read value from overflowed buffer 1");
    test.checkEqual(2, buffer.read(),
                    "can read value from overflowed buffer 2");
    test.checkEqual(3, buffer.read(),
                    "can read value from overflowed buffer 3");
    test.checkEqual(false, buffer.canRead(),
                    "values are gone after full read 1");
    buffer.write(5);
    buffer.write(6);
    test.checkEqual(true, buffer.canRead(), "values are ready to be read 2");
    test.checkEqual(5, buffer.read(),
                    "can read value from overflowed buffer 4");
    test.checkEqual(6, buffer.read(),
                    "can read value from overflowed buffer 5");
    test.checkEqual(false, buffer.canRead(),
                    "values are gone after full read 1");
}

static void testClear(Test& test) {
    RingBuffer<int, 3> buffer;
    buffer.write(1);
    buffer.write(2);
    buffer.clear();
    test.checkEqual(false, buffer.canRead(), "no read after clear");
}

void RingBufferTests::test() {
    Test test("RingBuffer");
    testReadAndWrite(test);
    testOverflow(test);
    testRefill(test);
    testClear(test);
    test.finalize();
}