Issue when dealing with Buffer keys

[renatocron]

I am encoding an 8-byte key and passing it as a Buffer object to the mocked ioredis. While writing tests, I encountered this issue with IDs that encoded to different buffers but overwrite the same key on the fake server.

Redis server do overwrite the key, thankfully (^_^)

Here's a code to reproduce this issue:

const FakeRedis = require('ioredis-mock')

function id2Buffer(id) {
    // expect 32 u int
    const buffer = Buffer.alloc(8);
    buffer.write('#:');
    buffer.writeUIntLE(id, 2, 6); // Supports up to 48 bits of accuracy.

    return buffer;
}

const redis = new FakeRedis();

const id1 = 3294967294;
const id2 = id1 + 1; // works as excpected if changed to 2 or to -127 (other negatives numbers seens to also be in the same 'range' that cause the conflict)
const [idBuf1, idBuf2] = [id2Buffer(id1), id2Buffer(id2)];

(async () => {
    await redis.set(idBuf1, 'a');
    await redis.set(idBuf2, 'b');

    const r1 = await redis.get(idBuf1);
    const r2 = await redis.get(idBuf2);

    console.log({ r1, r2 }); // prints { r1: 'b', r2: 'b' } instead of { r1: 'a', r2: 'b' }

    const keys = await redis.keys('*');
    console.log(keys); // prints just one key
})();