kumo 0.5.0

An async web crawling framework for Rust - Scrapy for Rust
Documentation 
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use kumo::extract::Response;

fn first_element(html: &str, selector: &str) -> kumo::extract::Element {
    Response::from_parts("https://example.com", 200, html)
        .css(selector)
        .first()
        .cloned()
        .unwrap()
}

#[test]
fn element_text_returns_concatenated_text() {
    let el = first_element("<p>Hello <strong>world</strong></p>", "p");
    assert_eq!(el.text(), "Hello world");
}

#[test]
fn element_text_strips_tags() {
    let el = first_element("<span>  kumo  </span>", "span");
    assert_eq!(el.text(), "  kumo  ");
}

#[test]
fn element_attr_returns_value() {
    let el = first_element(r#"<a href="/next">Next</a>"#, "a");
    assert_eq!(el.attr("href"), Some("/next".to_string()));
}

#[test]
fn element_attr_returns_none_for_missing() {
    let el = first_element("<a>No href</a>", "a");
    assert_eq!(el.attr("href"), None);
}

#[test]
fn element_inner_html_excludes_outer_tag() {
    let el = first_element("<div><span>inner</span></div>", "div");
    assert_eq!(el.inner_html(), "<span>inner</span>");
}

#[test]
fn element_css_selects_children() {
    let el = first_element("<ul><li>a</li><li>b</li></ul>", "ul");
    let items = el.css("li");
    assert_eq!(items.len(), 2);
    assert_eq!(items.first().unwrap().text(), "a");
}

#[test]
fn element_css_bad_selector_returns_empty() {
    let el = first_element("<div>x</div>", "div");
    let result = el.css("!!!bad");
    assert!(result.is_empty());
}

#[test]
fn element_list_iter_yields_all_elements() {
    let response = Response::from_parts("https://example.com", 200, "<span>a</span><span>b</span>");
    let list = response.css("span");
    let texts: Vec<String> = list.iter().map(|e| e.text()).collect();
    assert_eq!(texts, vec!["a", "b"]);
}

#[test]
fn element_list_first_returns_first() {
    let response = Response::from_parts(
        "https://example.com",
        200,
        "<span>first</span><span>second</span>",
    );
    let list = response.css("span");
    assert_eq!(list.first().unwrap().text(), "first");
}

#[test]
fn element_list_is_empty_when_empty() {
    let response = Response::from_parts("https://example.com", 200, "<div>x</div>");
    let list = response.css("span");
    assert!(list.is_empty());
    assert_eq!(list.len(), 0);
}

#[test]
fn element_re_returns_full_match_without_group() {
    let el = first_element("<p>Price: $42</p>", "p");
    assert_eq!(el.re(r"\$\d+"), vec!["$42"]);
}

#[test]
fn element_re_returns_capture_group_one() {
    let el = first_element("<p>Price: $42</p>", "p");
    assert_eq!(el.re(r"\$(\d+)"), vec!["42"]);
}

#[test]
fn element_re_first_returns_first_match() {
    let el = first_element("<p>1 and 2 and 3</p>", "p");
    assert_eq!(el.re_first(r"\d+"), Some("1".to_string()));
}

#[test]
fn element_re_first_returns_none_when_no_match() {
    let el = first_element("<p>no numbers here</p>", "p");
    assert_eq!(el.re_first(r"\d+"), None);
}

#[test]
fn element_re_invalid_pattern_returns_empty() {
    let el = first_element("<p>text</p>", "p");
    assert!(el.re("(unclosed").is_empty());
}

#[test]
fn element_list_re_flattens_across_elements() {
    let response = Response::from_parts(
        "https://example.com",
        200,
        "<span>$10</span><span>$20</span>",
    );
    let list = response.css("span");
    assert_eq!(list.re(r"\$(\d+)"), vec!["10", "20"]);
}

#[test]
fn element_list_re_first_returns_first_across_elements() {
    let response = Response::from_parts(
        "https://example.com",
        200,
        "<span>$10</span><span>$20</span>",
    );
    let list = response.css("span");
    assert_eq!(list.re_first(r"\$(\d+)"), Some("10".to_string()));
}