test_capture_limit.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Form History capture no more than 100 changes</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="satchel_common.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<p id="display"></p>

<div id="content" style="display: none">

  <form id="form1">

    <button type="submit">Submit</button>

  </form>

</div>

<script>

add_setup(async () => {

  const count = await countEntries(null, null);

  ok(!count, "initial storage is empty");

});

add_task(async function captureLimit() {

  // Capture no more than 100 fields per submit. See FormHistoryChild.sys.mjs.

  const inputsCount = 100 + 2;

  const form = document.getElementById("form1");

  for (let i = 1; i <= inputsCount; i++) {

    const newField = document.createElement("input");

    newField.setAttribute("type", "text");

    newField.setAttribute("name", "test" + i);

    form.appendChild(newField);

    if( i != 50) {

      SpecialPowers.wrap(newField).setUserInput(i);

  form.addEventListener("submit", e => e.preventDefault(), { once: true });

  const storageUpdated = promiseNextStorageEvent();

  getFormSubmitButton(1).click();

  await storageUpdated;

  for (let i = 1; i <= inputsCount; i++) { // check all but last

    const historyEntries = await countEntries("test" + i, i);

    switch(i) {

      case 50:

        is(historyEntries, 0, `no history saved for input ${i} because user didn't modify it`);

        break;

      case 102:

        is(historyEntries, 0, `no history saved for input ${i} because form already captured 100 fields`);

        break;

      default:

        is(historyEntries, 1, `history saved for input ${i}`);

        break;

});

</script>

</body>

</html>