use space_age::*;

fn assert_in_delta(expected: f64, actual: f64) {
    let diff: f64 = (expected - actual).abs();
    let delta: f64 = 0.01;
    if diff > delta {
        panic!("Your result of {actual} should be within {delta} of the expected result {expected}")
    }
}

#[test]
fn age_on_earth() {
    let seconds = 1_000_000_000;
    let duration = Duration::from(seconds);
    let output = Earth::years_during(&duration);
    let expected = 31.69;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_mercury() {
    let seconds = 2_134_835_688;
    let duration = Duration::from(seconds);
    let output = Mercury::years_during(&duration);
    let expected = 280.88;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_venus() {
    let seconds = 189_839_836;
    let duration = Duration::from(seconds);
    let output = Venus::years_during(&duration);
    let expected = 9.78;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_mars() {
    let seconds = 2_129_871_239;
    let duration = Duration::from(seconds);
    let output = Mars::years_during(&duration);
    let expected = 35.88;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_jupiter() {
    let seconds = 901_876_382;
    let duration = Duration::from(seconds);
    let output = Jupiter::years_during(&duration);
    let expected = 2.41;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_saturn() {
    let seconds = 2_000_000_000;
    let duration = Duration::from(seconds);
    let output = Saturn::years_during(&duration);
    let expected = 2.15;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_uranus() {
    let seconds = 1_210_123_456;
    let duration = Duration::from(seconds);
    let output = Uranus::years_during(&duration);
    let expected = 0.46;
    assert_in_delta(expected, output);
}

#[test]
fn age_on_neptune() {
    let seconds = 1_821_023_456;
    let duration = Duration::from(seconds);
    let output = Neptune::years_during(&duration);
    let expected = 0.35;
    assert_in_delta(expected, output);
}