lambda-calcul/rust/tests/interpret_test.rs


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use lambda::io::{batch_eval, eval_file, repl};

#[test]
fn interpreter_can_read_and_interpret_file() {
    assert_eq!("12 foo true (x x)", eval_file("sample/test.txt"));
    assert_eq!("true", eval_file("sample/test_full.txt"));
    assert_eq!("1", eval_file("sample/test_normal.txt"));
    assert_eq!("13", eval_file("sample/test_let.txt"));
}

#[test]
fn repl_can_read_and_interpret_input() {
    let input = "(def id (lam x x))\n(id 12)";
    let mut output = Vec::new();
    repl(&mut input.as_bytes(), &mut output);
    assert_eq!("> true\n> 12\n> ", String::from_utf8(output).unwrap());
}

#[test]
fn repl_can_read_and_interpret_input_in_batch_mode() {
    let input = "(def id (lam x x))\n(id 12)";
    let mut output = Vec::new();
    batch_eval(&mut input.as_bytes(), &mut output);
    assert_eq!("true\n12\n", String::from_utf8(output).unwrap());
}