use luafeed::run_method::run_method;

const SOURCE: &str = r#"
local root = ...
local items = {}
for _, a in ipairs(root:find_all("a")) do
    local href = a:attr("href")
    local text = a:text()
    if href and href ~= "" and text and text ~= "" then
        table.insert(items, { title = text, link = href })
    end
end
return items
"#;

const HTML: &str = r#"<html><body>
    <a href="/one">Post One</a>
    <a href="/two">Post Two</a>
    <a href="">Empty href, skipped</a>
    <span>Not a link</span>
</body></html>"#;

#[test]
fn extracts_items_via_dom_traversal() {
    let items = run_method(SOURCE, "https://example.com/", HTML).unwrap();
    assert_eq!(items.len(), 2);
    assert_eq!(items[0].title, "Post One");
    assert_eq!(items[0].link, "/one");
    assert_eq!(items[1].title, "Post Two");
    assert_eq!(items[1].link, "/two");
}

#[test]
fn missing_required_field_is_a_clear_error() {
    let source = r#"
        local root = ...
        return { { title = "No link here" } }
    "#;
    let err = run_method(source, "https://example.com/", HTML).unwrap_err();
    assert!(err.to_string().contains("link"));
}

#[test]
fn script_receives_the_fetch_url_as_a_second_argument() {
    let source = r#"
        local root, url = ...
        return { { title = "t", link = url } }
    "#;
    let items = run_method(source, "https://example.com/", HTML).unwrap();
    assert_eq!(items[0].link, "https://example.com/");
}