test_cache2-25-chunk-memory-limit.js

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"use strict";

function gen_200k() {

  var i;

  var data = "0123456789ABCDEFGHIJLKMNO";

  for (i = 0; i < 13; i++) {

    data += data;

  return data;

// Keep the output stream of the first entry in a global variable, so the

// CacheFile and its buffer isn't released before we write the data to the

// second entry.

var oStr;

function run_test() {

  do_get_profile();

  // set max chunks memory so that only one full chunk fits within the limit

  Services.prefs.setIntPref("browser.cache.disk.max_chunks_memory_usage", 300);

  asyncOpenCacheEntry(

    "http://a/",

    "disk",

    Ci.nsICacheStorage.OPEN_NORMALLY,

    null,

    function (status, entry) {

      Assert.equal(status, Cr.NS_OK);

      var data = gen_200k();

      oStr = entry.openOutputStream(0, data.length);

      Assert.equal(data.length, oStr.write(data, data.length));

      asyncOpenCacheEntry(

        "http://b/",

        "disk",

        Ci.nsICacheStorage.OPEN_NORMALLY,

        null,

        function (status1, entry1) {

          Assert.equal(status1, Cr.NS_OK);

          var oStr2 = entry1.openOutputStream(0, data.length);

          do_check_throws_nsIException(

            () => oStr2.write(data, data.length),

            "NS_ERROR_OUT_OF_MEMORY"

);

          finish_cache2_test();

);

);

  do_test_pending();