siderust 0.7.0

High-precision astronomy and satellite mechanics in Rust.
Documentation 
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// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (C) 2026 Vallés Puig, Ramon

use siderust::astro::orbit::KeplerianOrbit;
use siderust::bodies::planets::{OrbitExt, Planet, PlanetBuilderError};
use siderust::qtty::*;
use siderust::time::JulianDate;

#[test]
fn planet_builder_errors() {
    let builder = Planet::builder()
        .radius(Kilometers::new(1.0))
        .orbit(KeplerianOrbit::new(
            AstronomicalUnits::new(1.0),
            0.0,
            Degrees::new(0.0),
            Degrees::new(0.0),
            Degrees::new(0.0),
            Degrees::new(0.0),
            JulianDate::J2000,
        ));
    let err = builder.clone().try_build().unwrap_err();
    assert!(matches!(err, PlanetBuilderError::MissingMass));

    let err = Planet::builder()
        .mass(Kilograms::new(1.0))
        .try_build()
        .unwrap_err();
    assert!(matches!(err, PlanetBuilderError::MissingRadius));
}

#[test]
fn orbit_period_computation() {
    let k = 0.017_202_098_95_f64; // rad/day

    let orbit = KeplerianOrbit::new(
        AstronomicalUnits::new(1.0),
        0.0,
        Degrees::new(0.0),
        Degrees::new(0.0),
        Degrees::new(0.0),
        Degrees::new(0.0),
        JulianDate::J2000,
    );
    let planet = Planet::builder()
        .mass(Kilograms::new(1.0))
        .radius(Kilometers::new(1.0))
        .orbit(orbit)
        .build();

    let p = planet.orbit.period().value();
    let expected = 2.0 * std::f64::consts::PI / k * 1.0_f64.powf(1.5) * 86400.0;
    assert!((p - expected).abs() < 1e-6);
}