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use std::time::{Duration, Instant};
use toml::Value;
const TOLERANCE: f64 = 2.0;
fn measure_time(entries: usize, f: impl Fn(usize) -> String) -> Duration {
let start = Instant::now();
let mut s = String::new();
for i in 0..entries {
s += &f(i);
s += "entry = 42\n"
}
s.parse::<Value>().unwrap();
Instant::now() - start
}
#[test]
fn linear_increase_map() {
let time_1 = measure_time(100, |i| format!("[header_no_{}]\n", i));
let time_4 = measure_time(400, |i| format!("[header_no_{}]\n", i));
dbg!(time_1, time_4);
// Now ensure that the deserialization time has increased linearly
// (within a tolerance interval) instead of, say, quadratically
assert!(time_4 > time_1.mul_f64(4.0 - TOLERANCE));
assert!(time_4 < time_1.mul_f64(4.0 + TOLERANCE));
}
#[test]
fn linear_increase_array() {
let time_1 = measure_time(100, |i| format!("[[header_no_{}]]\n", i));
let time_4 = measure_time(400, |i| format!("[[header_no_{}]]\n", i));
dbg!(time_1, time_4);
// Now ensure that the deserialization time has increased linearly
// (within a tolerance interval) instead of, say, quadratically
assert!(time_4 > time_1.mul_f64(4.0 - TOLERANCE));
assert!(time_4 < time_1.mul_f64(4.0 + TOLERANCE));
}
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