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max.rs
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max.rs
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use core::iter::Iterator;
use average::{Estimate, Max, Merge};
#[test]
fn trivial() {
let mut m = Max::new();
m.add(2.);
m.add(1.);
assert_eq!(m.max(), 2.);
m.add(3.);
m.add(1.);
assert_eq!(m.max(), 3.)
}
#[cfg(feature = "serde1")]
#[test]
fn trivial_serde() {
let mut m = Max::new();
m.add(2.);
m.add(1.);
m.add(3.);
m.add(1.);
let b = serde_json::to_string(&m).unwrap();
assert_eq!(&b, "{\"x\":3.0}");
let c: Max = serde_json::from_str(&b).unwrap();
assert_eq!(c.max(), 3.)
}
#[test]
fn merge() {
let sequence: &[f64] = &[1., 2., 3., 4., 5., 6., 7., 8., 9.];
for mid in 1..sequence.len() {
let (left, right) = sequence.split_at(mid);
let max_total: Max = sequence.iter().collect();
assert_eq!(max_total.max(), 9.);
let mut max_left: Max = left.iter().collect();
assert_eq!(max_left.max(), sequence[mid - 1]);
let max_right: Max = right.iter().collect();
assert_eq!(max_right.max(), 9.);
max_left.merge(&max_right);
assert_eq!(max_total.max(), max_left.max());
}
}
#[test]
fn merge_empty() {
let mut left = Max::new();
let right = Max::new();
left.merge(&right);
assert_eq!(left.max(), f64::NEG_INFINITY);
left.add(1.);
assert_eq!(left.max(), 1.);
}