import { it, assert, assertEq } from '../test.js'
import RingBuffer from '/src/ring-buffer.js'

const enqueue = (buf, xs) => {
    if (Array.isArray(xs)) {
        return xs.forEach(x => enqueue(buf, x))
    }
    buf.enqueue(xs)
}

export default [
    it('should enqueue and dequeue items', () => {
        const buf = RingBuffer(5)
        enqueue(buf, [0, 1, 2, 3, 4])
        const result = buf.valueOf()
        assertEq(result, [0, 1, 2, 3, 4])
    }),

    it('should wrap on overflow', () => {
        const buf = RingBuffer(5)
        enqueue(buf, [0, 1, 2, 3, 4, 5])
        const result = buf.valueOf()
        assertEq(result, [1, 2, 3, 4, 5])
    }),

    it('should be empty on clear', () => {
        const buf = RingBuffer(5)
        enqueue(buf, [0, 1, 2, 3, 4])
        buf.clear()
        assert(buf.isEmpty(), 'buffer is not empty')
        assertEq(buf.size(), 0, 'buffer size is greater than 0')
    })
]