test_stringLength.js

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/**

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/

*/

add_task(async function testSteps() {

  const principal = getPrincipal("http://example.org");

  const data = {};

  data.key = "foobar";

  data.secondKey = "foobaz";

  data.value = {

    length: 25637,

};

  data.usage = data.key.length + data.value.length;

  async function checkUsage(expectedUsage) {

    info("Checking usage");

    // This forces any pending changes to be flushed to disk.  It also forces

    // data to be reloaded from disk at next localStorage API call.

    request = resetClient(principal);

    await requestFinished(request);

    request = getOriginUsage(principal);

    await requestFinished(request);

    is(request.result.usage, expectedUsage, "Correct usage");

  info("Setting pref");

  Services.prefs.setBoolPref(

    "dom.storage.enable_unsupported_legacy_implementation",

    false

);

  info("Stage 1 - Checking usage after profile installation");

  info("Clearing");

  let request = clear();

  await requestFinished(request);

  info("Installing package");

  // The profile contains storage.sqlite and webappsstore.sqlite.

  installPackage("stringLength_profile");

  await checkUsage(0);

  info("Stage 2 - Checking usage after archived data migration");

  info("Opening database");

  let storage = getLocalStorage(principal);

  storage.open();

  await checkUsage(data.usage);

  info("Stage 3 - Checking usage after copying the value");

  info("Adding a second copy of the value");

  let value = storage.getItem(data.key);

  storage.setItem(data.secondKey, value);

  await checkUsage(2 * data.usage);

  info("Stage 4 - Checking length of the copied value");

  value = storage.getItem(data.secondKey);

  Assert.strictEqual(value.length, data.value.length, "Correct string length");

});