tablo-macros 0.10.0

Procedural macros for Tablo.
Documentation 
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use super::{expand_checked, sentence_case, snake_case};

fn refusal(source: &str) -> String {
    let input: syn::DeriveInput = syn::parse_str(source).expect("the derive input parses");
    match expand_checked(&input) {
        Ok(_) => String::from("<accepted>"),
        Err(error) => error.to_string(),
    }
}

#[test]
fn two_variants_sharing_a_value_or_a_label_are_refused() {
    let message = refusal(r#"enum S { A, #[option(value = "a")] B }"#);
    assert!(message.contains("both store"), "{message}");
    let message = refusal(r#"enum S { A, #[option(label = "A")] B }"#);
    assert!(message.contains("both read as"), "{message}");
}

#[test]
fn a_variant_stores_its_snake_case_name_and_reads_in_sentence_case() {
    assert_eq!(snake_case("Draft"), "draft");
    assert_eq!(snake_case("PublishedLate"), "published_late");
    assert_eq!(sentence_case("published_late"), "Published late");
}

#[test]
fn a_blank_or_padded_value_is_refused() {
    for value in ["", " ", " a", "a "] {
        let message = refusal(&format!(r#"enum S {{ #[option(value = "{value}")] A }}"#));
        assert!(
            message.contains("no space at either end"),
            "{value:?}: {message}"
        );
    }
    let inner = refusal(r#"enum S { #[option(value = "a b")] A }"#);
    assert!(!inner.contains("no space at either end"), "{inner}");
}