//! Channel-centric unit scaffolding validating mock sinks.

#[path = "../support/mod.rs"]
mod support;

mod helpers;

use helpers::*;
use niom_turn::stun::{build_channel_data, parse_channel_data};
use support::mocks;

#[tokio::test(flavor = "current_thread")]
async fn channel_sink_mock_records_payload() {
    let mut sink = mocks::MockChannelSink::new();
    sink
        .expect_send_channel_data()
        .withf(|channel, payload| *channel == sample_channel_number() && payload == &sample_payload())
        .returning(|_, _| Box::pin(async { Ok(()) }));

    sink
        .send_channel_data(sample_channel_number(), sample_payload())
        .await
        .expect("channel data to send");
}

#[test]
fn parse_channel_data_round_trip() {
    let payload = sample_payload();
    let frame = build_channel_data(sample_channel_number(), &payload);
    let (channel, body) = parse_channel_data(&frame).expect("parse channel frame");
    assert_eq!(channel, sample_channel_number());
    assert_eq!(body, payload.as_slice());
}

#[test]
fn parse_channel_data_rejects_invalid_channel_range() {
    let mut frame = build_channel_data(sample_channel_number(), &sample_payload());
    frame[0] = 0x20; // invalid prefix (must be 0x40)
    assert!(parse_channel_data(&frame).is_none());
}