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use super::value::Value;
use super::*;
use crate::Lox;
fn expect(code: &str, value: Value) {
let result = Interpreter::create()
.interpret(code.into())
.expect("evaluation failed");
assert_eq!(result, value);
}
fn expect_num(code: &str, value: f64) {
expect(code, Value::Number(value))
}
fn expect_bool(code: &str, value: bool) {
expect(code, Value::Bool(value))
}
#[test]
fn numbers() {
expect_num("1", 1.0);
expect_num("13.37", 13.37);
}
#[test]
fn negative_numbers() {
// Note: This technically tests unary operators.
expect_num("-1", -1.0);
expect_num("-13.37", -13.37);
}
#[test]
fn terms() {
expect_num("1 + 2", 3.0);
expect_num("3 - 1", 2.0);
expect_num("0.7 + 0.3", 1.0);
expect_num("1 + -3", -2.0);
expect_num("-1 - -1", 0.0);
expect_num("10 - -10 + 10", 30.0);
}
#[test]
fn factors() {
expect_num("1 * 2", 2.0);
expect_num("10 / 5", 2.0);
expect_num("0.7 * 4 / 1.4", 2.0);
expect_num("10 * -10 / 10", -10.0);
}
#[test]
fn arithmetic() {
expect_num("10 - 3 * 2", 4.0);
expect_num("-4 * -4 + (14 - 5)", 25.0);
expect_num("(702 + 408) - ((239 - 734) / -5) + -4", 1007.0);
}
#[test]
fn trivial_literals() {
expect("true", Value::Bool(true));
expect("false", Value::Bool(false));
expect("nil", Value::Nil);
}
#[test]
fn negation() {
expect_bool("!true", false);
expect_bool("!false", true);
expect_bool("!nil", true);
expect_bool("!13.5", false);
expect_bool("!-42", false);
}
#[test]
fn equality() {
expect_bool("42 == 42", true);
expect_bool("42 != 42", false);
expect_bool("42 == 42.0", true);
expect_bool("true == true", true);
expect_bool("true == false", false);
expect_bool("true == !false", true);
expect_bool("true != true", false);
expect_bool("true != false", true);
expect_bool("42 == false", false);
expect_bool("42 == true", false);
expect_bool("!42 == !true", true);
}
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