this_algorithm/tests/algorithm.rs

use common::test_events;
use s2::cellid::CellID;
use this_algorithm::Error;
use this_algorithm::{Address, CELLID_LEVEL};
#[macro_use]
mod common;
use common::CELLID_LEVEL_23_BITMASK;
use common::CELLID_LEVEL_23_END_BIT;

#[test]
fn test_invalid_lat_lon() {
    assert_eq!(
        Address::from_lat_lon(1.0_f64, 400.0_f64),
        Err(Error::InvalidLatLng)
    );
    assert_eq!(
        Address::from_lat_lon(1.0_f64, f64::NAN),
        Err(Error::InvalidLatLng)
    );
}

#[test]
fn test_cellid_translation() {
    for (idx, entry) in test_events().iter().enumerate() {
        let addr = Address::from_lat_lon(entry.lat, entry.lon).unwrap();
        let addr_cellid = addr.as_cellid();

        eprintln!("Testing word {idx}");

        eprintln!(
            "Entry: ({},{}) => {:0>64b}",
            entry.lat, entry.lon, entry.cellid
        );
        eprintln!("\taddr: {addr}");

        // Make sure the rust s2 implementation is accurate
        assert_eq!(entry.cellid, CellID(entry.cellid).0);
        assert_eq!(
            (entry.cellid & CELLID_LEVEL_23_BITMASK) | CELLID_LEVEL_23_END_BIT,
            CellID(entry.cellid).parent(CELLID_LEVEL).0
        );

        // Make sure the address is at the right level
        assert_eq!(addr_cellid.level(), CELLID_LEVEL);

        // Next, check if creating an address from a cellid matches itself
        assert_eq!(addr, Address::from_cellid_u64(entry.cellid));

        // Now check if the actual cell id matches
        assert_eq_u64!(addr_cellid.0, CellID(entry.cellid).parent(CELLID_LEVEL).0);
    }
}

#[test]
fn test_encoding() {
    for (_idx, entry) in test_events().iter().enumerate() {
        let addr = Address::from_lat_lon(entry.lat, entry.lon).unwrap();
        eprintln!("({}, {}) => {addr}", entry.lat, entry.lon);
    }
    // TODO:
    // assert!(false);
}

#[test]
fn test_decoding() {}