serenity/Tests/LibWeb/Text/input/HTML/form-implicit-submission.html

<form id="defaultButton">
    <input />
    <button>PASS</button>
</form>
<form id="defaultButtonAsInput">
    <input />
    <input type="submit" value="PASS" />
</form>
<form id="defaultButtonIsSecond">
    <input />
    <button type="button">FAIL</button>
    <button>PASS</button>
    <button type="button">FAIL</button>
</form>
<form id="defaultButtonIsLast">
    <input />
    <button type="button">FAIL</button>
    <button type="button">FAIL</button>
    <button>PASS</button>
</form>
<button form="defaultButtonIsBeforeForm">PASS</button>
<form id="defaultButtonIsBeforeForm">
    <input />
</form>
<form id="defaultButtonIsAfterForm">
    <input />
</form>
<button form="defaultButtonIsAfterForm">PASS</button>
<form id="defaultButtonIsDynamicallyInserted">
    <input />
    <button>FAIL</button>
</form>
<form id="defaultButtonIsDisabled">
    <input />
    <button disabled>FAIL</button>
</form>
<form id="noButton">
    <input />
</form>
<form id="noDefaultButton">
    <input />
    <button type="button">FAIL</button>
</form>
<form id="excessiveBlockingElements1">
    <input />
    <input />
</form>
<form id="excessiveBlockingElements2">
    <input />
    <input type="time" />
</form>
<script src="../include.js"></script>
<script>
    let handledEvent = false;

    const enterTextAndSubmitForm = form => {
        const input = form.querySelector("input");

        handledEvent = false;
        internals.sendText(input, "wfh :^)");
        internals.commitText();

        println(`${form.id}: handledEvent=${handledEvent}`);
    };

    test(() => {
        const button = document.createElement("button");
        button.setAttribute("form", "defaultButtonIsDynamicallyInserted");
        button.innerText = "PASS";

        const dynamicForm = document.getElementById("defaultButtonIsDynamicallyInserted");
        dynamicForm.insertBefore(button, dynamicForm.elements[0]);

        document.querySelectorAll("form").forEach(form => {
            form.addEventListener("submit", event => {
                event.preventDefault();

                println(`${form.id}: submit`);
                handledEvent = true;
            });

            for (const element of form.elements) {
                element.addEventListener("click", () => {
                    const text = element.value || element.innerText;
                    println(`${form.id}: click button=${text}`);

                    handledEvent = true;
                });
            }

            enterTextAndSubmitForm(form);
        });
    });
</script>