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|
use super::*;
fn code(code: &str) -> Vec<char> {
code.chars().collect()
}
/// Evaluate a code snippet, returning a value.
fn parse_eval<'a>(chars: &'a [char]) -> Value<'a> {
let tokens = scanner::scan(&chars).expect("could not scan code");
let program = parser::parse(tokens).expect("could not parse code");
Interpreter::create()
.interpret(&program)
.expect("could not eval code")
}
#[test]
fn test_if() {
let code = code(
r#"
if (42 > 23)
"pass";
else
"fail";
"#,
);
assert_eq!(
Value::Literal(Literal::String("pass".into())),
parse_eval(&code)
);
}
#[test]
fn test_scope() {
let code = code(
r#"
var result = "";
var a = "global a, ";
var b = "global b, ";
var c = "global c";
{
var a = "outer a, ";
var b = "outer b, ";
{
var a = "inner a, ";
result = a + b + c;
}
}
"#,
);
assert_eq!(
Value::Literal(Literal::String("inner a, outer b, global c".into())),
parse_eval(&code),
);
}
#[test]
fn test_binary_operators() {
assert_eq!(
Value::Literal(Literal::Number(42.0)),
parse_eval(&code("40 + 2;"))
);
assert_eq!(
Value::Literal(Literal::String("foobar".into())),
parse_eval(&code("\"foo\" + \"bar\";"))
);
}
#[test]
fn test_functions() {
let code = code(
r#"
fun add(a, b, c) {
a + b + c;
}
add(1, 2, 3);
"#,
);
assert_eq!(Value::Literal(Literal::Number(6.0)), parse_eval(&code));
}
|
