You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: element.rs
    path of file: ./repos/wasm-bindgen/crates/web-sys/tests/wasm
    
    the code of the file until where you have to start completion: use wasm_bindgen::prelude::*;
use wasm_bindgen_test::*;
use web_sys::Element;

#[wasm_bindgen(module = "/tests/wasm/element.js")]
extern "C" {
    fn new_div() -> Element;
}

#[wasm_bindgen_test]
fn element() {
    /* Tests needed for:
      namespace_uri
    */
    let element = new_div();

    assert_eq!(element, element);

    assert_eq!(element.prefix(), None, "Shouldn't have a prefix");
    assert_eq!(element.local_name(), "div", "Should have a div local name");
    assert_eq!(element.tag_name(), "DIV", "Should be a div tag");
    assert!(!element.has_attribute("id"), "Shouldn't have an id");
    element.set_id("beep");
    assert_eq!(element.id(), "beep", "Should have an id of 'beep'");

    // must_use is set on this result?
    assert_eq!(
        element.set_attribute("id", "beep").unwrap(),
        (),
        "Should set id"
    );
    assert!(element.has_attribute("id"), "Should now have an id");
    assert_eq!(
        element.remove_attribute("id").unwrap(),
        (),
        "Should return nothing if removed"
    );

    assert_eq!(element.class_name(), "", "Shouldn't have a class name");
    element.set_class_name("test thing");
    assert_eq!(
        element.class_name(),
        "test thing",
        "Should have a class name"
    );
    assert_eq!(
        element.get_attribute("class").unwrap(),
        "test thing",
        "Should have a class name"
    );
    assert_eq!(
        element.remove_attribute("class").unwrap(),
        (),
        "Should return nothing if removed"
    );
    /* Tests needed for:
    get_attribute_ns
    */

    assert!(!element.has_attribute("disabled"), "Should not be disabled");
    assert!(
        element.toggle_attribute("disabled").unwrap(),
        "Should return true when attribute is set"
    );
    assert!(element.has_attribute("disabled"), "Should be disabled");
    assert!(
        element
            .toggle_attribute_with_force("disabled", true)
            .unwrap(),
        "Should return true when attribute is set"
    );
    assert!(element.has_attribute("disabled"), "Should be disabled");
    assert!(
        !element
            .toggle_attribute_with_force("disabled", false)
            .unwrap(),
        "Should return false when attribute is not set"
    );
    assert!(!element.has_attribute("disabled"), "Should not be disabled");

    assert!(!element.has_attribute("title"), "Should not have a title");
    assert_eq!(
        element.set_attribute("title", "boop").unwrap(),
        (),
        "Should return nothing if set correctly"
    );
    assert!(element.has_attribute("title"), "Should have a title");
    assert_eq!(
        element.get_attribute("title").unwrap(),
        "boop",
        "Title should be 'boop'"
    );
    assert_eq!(
        element.remove_attribute("title").unwrap(),
        (),
        "Should return nothing if removed"
    );
    assert!(!element.has_attribute("title"), "Should not have a title");
    /* Tests needed for:
    set_attribute_ns
    */

    assert!(!element.has_attributes(), "Should not have any attributes");
    assert_eq!(
        element.set_attribute("title", "boop").unwrap(),
        (),
        "Should return nothing if set correctly"
    );
    assert!(element.has_attributes(), "Should have attributes");
    assert_eq!(
        element.remove_attribute("title").unwrap(),
        (),
        "Should return nothing if removed"
    );
    /* Tests needed for:
    remove_attribute_ns
    has_attribute_ns
    closest
    */

    assert_eq!(
        element.matches(".this-is-a-thing").unwrap(),
        false,
        "Should not match selector"
    );
    assert_eq!(
        element.webkit_matches_selector(".this-is-a-thing").unwrap(),
        false,
        "Should not match selector"
    );
    element.set_class_name("this-is-a-thing");
    assert_eq!(
        element.matches(".this-is-a-thing").unwrap(),
        true,
        "Should match selector"
    );
    assert_eq!(
        element.webkit_matches_selector(".this-is-a-thing").unwrap(),
        true,
        "Should match selector"
    );
    assert_eq!(
        element.remove_attribute("class").unwrap(),
        (),
        "Should return nothing if removed"
    );

    /* Tests needed for:
    insert_adjacent_element
    insert_adjacent_text
    set_pointer_capture
    release_pointer_capture
    has_pointer_capture
    set_capture
    release_capture
    scroll_top
    set_scroll_top
    scroll_left
    set_scroll_left
    scroll_width
    scroll_height
    scroll,
    scroll_to
    scroll_by
    client_top
    client_left
    client_width
    client_height
    scroll_top_max
    scroll_left_max
    */
    assert_eq!(element.inner_html(), "", "Should return no content");
    element.set_inner_html("<strong>Hey!</strong><em>Web!</em>");
    assert_eq!(
        element.inner_html(),
        "<strong>Hey!</strong><em>Web!</em>",
        "Should return HTML content"
    );
    assert_eq!(
        element.query_selector_all("strong").unwrap().length(),
        1,
        "Should return one element"
    );
    assert!(
        e
    
fn element() {
    /* Tests needed for:
      namespace_uri
    */
    let element = new_div();

    assert_eq!(element, element);

    assert_eq!(element.prefix(), None, "Shouldn't have a prefix");
    assert_eq!(element.local_name(), "div", "Should have a div local name");
    assert_eq!(element.tag_name(), "DIV", "Should be a div tag");
    assert!(!element.has_attribute("id"), "Shouldn't have an id");
    element.set_id("beep");
    assert_eq!(element.id(), "beep", "Should have an id of 'beep'");

    // must_use is set on this result?
    assert_eq!(
        element.set_attribute("id", "beep").unwrap(),
        (),
        "Should set id"
    );
    assert!(element.has_attribute("id"), "Should now have an id");
    assert_eq!(
        element.remove_attribute("id").unwrap(),
        (),
        "Should return nothing if removed"
    );

    assert_eq!(element.class_name(), "", "Shouldn't have a class name");
    element.set_class_name("test thing");
    assert_eq!(
        element.class_name(),
        "test thing",
        "Should have a class name"
    );
    assert_eq!(
        element.get_attribute("class").unwrap(),
        "test thing",
        "Should have a class name"
    );
    assert_eq!(
        element.remove_attribute("class").unwrap(),
        (),
        "Should return nothing if removed"
    );
    /* Tests needed for:
    get_attribute_ns
    */

    assert!(!element.has_attribute("disabled"), "Should not be disabled");
    assert!(
        element.toggle_attribute("disabled").unwrap(),
        "Should return true when attribute is set"
    );
    assert!(element.has_attribute("disabled"), "Should be disabled");
    assert!(
        element
            .toggle_attribute_with_force("disabled", true)
            .unwrap(),
        "Should return true when attribute is set"
    );
    assert!(element.has_attribute("disabled"), "Should be disabled");
    assert!(
        !element
            .toggle_attribute_with_force("disabled", false)
            .unwrap(),
        "Should return false when attribute is not set"
    );
    assert!(!element.has_attribute("disabled"), "Should not be disabled");

    assert!(!element.has_attribute("title"), "Should not have a title");
    assert_eq!(
        element.set_attribute("title", "boop").unwrap(),
        (),
        "Should return nothing if set correctly"
    );
    assert!(element.has_attribute("title"), "Should have a title");
    assert_eq!(
        element.get_attribute("title").unwrap(),
        "boop",
        "Title should be 'boop'"
    );
    assert_eq!(
        element.remove_attribute("title").unwrap(),
        (),
        "Should return nothing if removed"
    );
    assert!(!element.has_attribute("title"), "Should not have a title");
    /* Tests needed for:
    set_attribute_ns
    */

    assert!(!element.has_attributes(), "Should not have any attributes");
    assert_eq!(
        element.set_attribute("title", "boop").unwrap(),
        (),
        "Should return nothing if set correctly"
    );
    assert!(element.has_attributes(), "Should have attributes");
    assert_eq!(
        element.remove_attribute("title").unwrap(),
        (),
        "Should return nothing if removed"
    );
    /* Tests needed for:
    remove_attribute_ns
    has_attribute_ns
    closest
    */

    assert_eq!(
        element.matches(".this-is-a-thing").unwrap(),
        false,
        "Should not match selector"
    );
    assert_eq!(
        element.webkit_matches_selector(".this-is-a-thing").unwrap(),
        false,
        "Should not match selector"
    );
    element.set_class_name("this-is-a-thing");
    assert_eq!(
        element.matches(".this-is-a-thing").unwrap(),
        true,
        "Should match selector"
    );
    assert_eq!(
        element.webkit_matches_selector(".this-is-a-thing").unwrap(),
        true,
        "Should match selector"
    );
    assert_eq!(
        element.remove_attribute("class").unwrap(),
        (),
        "Should return nothing if removed"
    );

    /* Tests needed for:
    insert_adjacent_element
    insert_adjacent_text
    set_pointer_capture
    release_pointer_capture
    has_pointer_capture
    set_capture
    release_capture
    scroll_top
    set_scroll_top
    scroll_left
    set_scroll_left
    scroll_width
    scroll_height
    scroll,
    scroll_to
    scroll_by
    client_top
    client_left
    client_width
    client_height
    scroll_top_max
    scroll_left_max
    */
    assert_eq!(element.inner_html(), "", "Should return no content");
    element.set_inner_html("<strong>Hey!</strong><em>Web!</em>");
    assert_eq!(
        element.inner_html(),
        "<strong>Hey!</strong><em>Web!</em>",
        "Should return HTML content"
    );
    assert_eq!(
        element.query_selector_all("strong").unwrap().length(),
        1,
        "Should return one element"
    );
    assert!(
        element.query_selector("strong").unwrap().is_some(),
        "Should return an element"
    );
    element.set_inner_html("");
    assert_eq!(element.inner_html(), "", "Should return no content");

    /* Tests needed for:
    outer_html
    set_outer_html
    insert_adjacent_html
    */

    assert!(
        element.query_selector(".none-existent").unwrap().is_none(),
        "Should return no results"
    );
    assert_eq!(
        element
            .query_selector_all(".none-existent")
            .unwrap()
            .length(),
        0,
        "Should return no results"
    );
    /* Tests needed for:
      slot
      set_slot
      request_fullscreen
      request_pointer_lock
    */

    let child = new_div();
    assert_eq!(
        element.get_elements_by_tag_name("div").length(),
        0,
        "Element should not contain any div child"
    );
    element.append_child(&child).unwrap();
    assert_eq!(
        element.get_elements_by_tag_name("div").length(),
        1,
        "Element should contain one div child"
    );
    assert_eq!(
        element.get_elements_by_class_name("foo").length(),
        0,
        "Element should not have childs with class foo"
    );
    child.class_list().add_1("foo").unwrap();
    assert_eq!(
        element.get_elements_by_class_name("foo").length(),
        1,
        "Element should have one child with class foo"
    );
    element.remove_child(&child).unwrap();
}