netwerk/test/unit/test_bug654926.js

   1 "use strict";
   2
   3 function gen_1MiB() {
   4   var i;
   5   var data = "x";
   6   for (i = 0; i < 20; i++) {
   7     data += data;
   8   }
   9   return data;
  10 }
  11
  12 function write_and_check(str, data, len) {
  13   var written = str.write(data, len);
  14   if (written != len) {
  15     do_throw(
  16       "str.write has not written all data!\n" +
  17         "  Expected: " +
  18         len +
  19         "\n" +
  20         "  Actual: " +
  21         written +
  22         "\n"
  23     );
  24   }
  25 }
  26
  27 function write_datafile(status, entry) {
  28   Assert.equal(status, Cr.NS_OK);
  29   var data = gen_1MiB();
  30   var os = entry.openOutputStream(0, data.length);
  31
  32   // write 2MiB
  33   var i;
  34   for (i = 0; i < 2; i++) {
  35     write_and_check(os, data, data.length);
  36   }
  37
  38   os.close();
  39
  40   // now change max_entry_size so that the existing entry is too big
  41   Services.prefs.setIntPref("browser.cache.disk.max_entry_size", 1024);
  42
  43   // append to entry
  44   asyncOpenCacheEntry(
  45     "http://data/",
  46     "disk",
  47     Ci.nsICacheStorage.OPEN_NORMALLY,
  48     null,
  49     append_datafile
  50   );
  51 }
  52
  53 function append_datafile(status, entry) {
  54   Assert.equal(status, Cr.NS_OK);
  55   var os = entry.openOutputStream(entry.dataSize, -1);
  56   var data = gen_1MiB();
  57
  58   // append 1MiB
  59   try {
  60     write_and_check(os, data, data.length);
  61     do_throw();
  62   } catch (ex) {}
  63
  64   // closing the ostream should fail in this case
  65   try {
  66     os.close();
  67     do_throw();
  68   } catch (ex) {}
  69
  70   do_test_finished();
  71 }
  72
  73 function run_test() {
  74   do_get_profile();
  75
  76   // clear the cache
  77   evict_cache_entries();
  78
  79   asyncOpenCacheEntry(
  80     "http://data/",
  81     "disk",
  82     Ci.nsICacheStorage.OPEN_NORMALLY,
  83     null,
  84     write_datafile
  85   );
  86
  87   do_test_pending();
  88 }