rink 0.3.0

Unit conversion tool and library, similar to frink
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

extern crate rink;

use rink::*;

thread_local! {
    static CONTEXT: Context = load().unwrap();
}

fn test(input: &str, output: &str) {
    let mut iter = text_query::TokenIterator::new(input.trim()).peekable();
    let expr = text_query::parse_query(&mut iter);
    CONTEXT.with(|ctx| {
        let res = ctx.eval_outer(&expr);
        let res = match res {
            Ok(v) => v,
            Err(v) => v
        };
        assert_eq!(res, output);
    });
}

#[test]
fn test_definition() {
    test("watt", "Definition: watt = J / s = 1 watt (power; kg m^2 / s^3)");
}

#[test]
fn test_eval() {
    test("5 inch", "0.127 m (length)");
}

#[test]
fn test_convert() {
    test("5 inch -> cm", "12.7 centim (length)");
}

#[test]
fn test_temp() {
    test("2 degC 2 -> degC", "277.15 °C (temperature)");
}

#[test]
fn test_determinism() {
    test("weber / m", "1 m tesla");
}

#[test]
fn test_sqrt_errors() {
    test("sqrt -1",
         "Complex numbers are not implemented: sqrt <-1 (dimensionless)>");
    test("sqrt(2m)",
         "Result must have integer dimensions: sqrt <2 m (length)>");
}