harn-lint 0.10.13

Linter for the Harn programming language
Documentation 
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use super::*;

#[test]
fn test_nil_coalesce_noop_fix_drops_nil_fallback() {
    let source = r"
pipeline default(task) {
  const value = task?.flag ?? nil
  log(value)
}
";
    let diags = lint_source(source);
    assert_eq!(count_rule(&diags, "nil-coalesce-noop"), 1, "{diags:?}");
    let fix = get_fix(&diags, "nil-coalesce-noop").expect("fix");
    assert_eq!(fix.len(), 1);
    assert_eq!(fix[0].replacement, "");

    let result = apply_fixes(source, &diags);
    assert!(
        result.contains("const value = task?.flag\n"),
        "expected nil fallback to be removed, got: {result}"
    );
    let mut lexer = Lexer::new(&result);
    let tokens = lexer.tokenize().expect("relex after fix");
    let mut parser = Parser::new(tokens);
    parser.parse().expect("reparse after fix");
}

#[test]
fn test_nil_coalesce_noop_warns_not_errors() {
    let source = r"
pipeline default(task) {
  const value = task?.flag ?? nil
  log(value)
}
";
    let diags = lint_source(source);
    let diag = diags
        .iter()
        .find(|diag| diag.rule == "nil-coalesce-noop")
        .expect("nil coalesce diag");
    assert_eq!(diag.severity, LintSeverity::Warning);
}

#[test]
fn test_nil_coalesce_noop_ignores_real_fallbacks() {
    let source = r#"
pipeline default(task) {
  const value = task?.flag ?? "off"
  log(value)
}
"#;
    let diags = lint_source(source);
    assert!(
        !has_rule(&diags, "nil-coalesce-noop"),
        "non-nil fallback should not trigger: {diags:?}"
    );
}