zulip/frontend_tests/node_tests/spoilers.js

set_global("$", global.make_zjquery());
zrequire("spoilers");

// This function is taken from rendered_markdown.js and slightly modified.
const $array = (array) => {
    const each = (func) => {
        array.forEach((elem, index) => {
            func.call(this, index, elem);
        });
    };
    return {each};
};

const get_spoiler_elem = (title) => {
    const block = $.create(`block-${title}`);
    const header = $.create(`header-${title}`);
    const content = $.create(`content-${title}`);
    header.text(title);
    block.set_find_results(".spoiler-header", header);
    block.set_find_results(".spoiler-content", content);
    return block;
};

run_test("hide spoilers in notifications", () => {
    const root = $.create("root element");
    const spoiler_1 = get_spoiler_elem("this is the title");
    const spoiler_2 = get_spoiler_elem("");
    root.set_find_results(".spoiler-block", $array([spoiler_1, spoiler_2]));
    spoilers.hide_spoilers_in_notification(root);
    assert.equal(spoiler_1.find(".spoiler-header").text(), "this is the title (…)");
    assert.equal(spoiler_2.find(".spoiler-header").text(), "(…)");
});