netwerk/test/unit/test_bug654926_test_seek.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_and_check(os, data, data.length);
  33
  34   os.close();
  35
  36   // try to open the entry for appending
  37   asyncOpenCacheEntry(
  38     "http://data/",
  39     "disk",
  40     Ci.nsICacheStorage.OPEN_NORMALLY,
  41     null,
  42     open_for_readwrite
  43   );
  44 }
  45
  46 function open_for_readwrite(status, entry) {
  47   Assert.equal(status, Cr.NS_OK);
  48   var os = entry.openOutputStream(entry.dataSize, -1);
  49
  50   // Opening the entry for appending data calls nsDiskCacheStreamIO::Seek()
  51   // which initializes mFD. If no data is written then mBufDirty is false and
  52   // mFD won't be closed in nsDiskCacheStreamIO::Flush().
  53
  54   os.close();
  55
  56   do_test_finished();
  57 }
  58
  59 function run_test() {
  60   do_get_profile();
  61
  62   // clear the cache
  63   evict_cache_entries();
  64
  65   asyncOpenCacheEntry(
  66     "http://data/",
  67     "disk",
  68     Ci.nsICacheStorage.OPEN_NORMALLY,
  69     null,
  70     write_datafile
  71   );
  72
  73   do_test_pending();
  74 }