test(tazjin/rlox): Add some tests for numerical operations

If I was adding any dependencies, this might be a good one for a
property-based test thing, but I'm not going to.

Change-Id: Ia801d041479d1a88c59ef9e0fe1460b3640382e3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2569
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
This commit is contained in:
Vincent Ambo 2021-02-28 13:08:54 +02:00 committed by tazjin
parent fd2139ce31
commit 6b990a7571
2 changed files with 51 additions and 0 deletions

View file

@ -9,6 +9,9 @@ mod opcode;
mod value;
mod vm;
#[cfg(test)]
mod tests;
use chunk::Chunk;
pub struct Interpreter {}

View file

@ -0,0 +1,48 @@
use super::*;
use crate::Lox;
fn expect(code: &str, value: value::Value) {
let result = Interpreter::create()
.interpret(code.into())
.expect("evaluation failed");
assert_eq!(result, value);
}
#[test]
fn numbers() {
expect("1", 1.0);
expect("13.37", 13.37);
}
#[test]
fn negative_numbers() {
// Note: This technically tests unary operators.
expect("-1", -1.0);
expect("-13.37", -13.37);
}
#[test]
fn terms() {
expect("1 + 2", 3.0);
expect("3 - 1", 2.0);
expect("0.7 + 0.3", 1.0);
expect("1 + -3", -2.0);
expect("-1 - -1", 0.0);
expect("10 - -10 + 10", 30.0);
}
#[test]
fn factors() {
expect("1 * 2", 2.0);
expect("10 / 5", 2.0);
expect("0.7 * 4 / 1.4", 2.0);
expect("10 * -10 / 10", -10.0);
}
#[test]
fn arithmetic() {
expect("10 - 3 * 2", 4.0);
expect("-4 * -4 + (14 - 5)", 25.0);
expect("(702 + 408) - ((239 - 734) / -5) + -4", 1007.0);
}