rhai/tests/print.rs

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use rhai::{Engine, EvalAltResult};
use std::sync::{Arc, RwLock};
#[test]
fn test_print() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
let logbook = Arc::new(RwLock::new(Vec::<String>::new()));
// Redirect print/debug output to 'log'
let log = logbook.clone();
engine.on_print(move |s| log.write().unwrap().push(format!("entry: {}", s)));
let log = logbook.clone();
engine.on_debug(move |s| log.write().unwrap().push(format!("DEBUG: {}", s)));
// Evaluate script
engine.eval::<()>("print(40 + 2)")?;
engine.eval::<()>(r#"debug("hello!")"#)?;
// 'logbook' captures all the 'print' and 'debug' output
assert_eq!(logbook.read().unwrap().len(), 2);
assert_eq!(logbook.read().unwrap()[0], "entry: 42");
assert_eq!(logbook.read().unwrap()[1], r#"DEBUG: "hello!""#);
for entry in logbook.read().unwrap().iter() {
println!("{}", entry);
}
Ok(())
}