rust-average/tests/max.rs
2017-12-20 16:46:50 -05:00

53 lines
1.3 KiB
Rust

#![cfg_attr(feature = "cargo-clippy", allow(float_cmp, map_clone))]
extern crate average;
extern crate core;
#[cfg(feature = "serde")]
extern crate serde_json;
use core::iter::Iterator;
use average::{Max, Estimate, 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 = "serde")]
#[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().map(|x| *x).collect();
assert_eq!(max_total.max(), 9.);
let mut max_left: Max = left.iter().map(|x| *x).collect();
assert_eq!(max_left.max(), sequence[mid - 1]);
let max_right: Max = right.iter().map(|x| *x).collect();
assert_eq!(max_right.max(), 9.);
max_left.merge(&max_right);
assert_eq!(max_total.max(), max_left.max());
}
}