michael@0: function gen_1MiB()
michael@0: {
michael@0:   var i;
michael@0:   var data="x";
michael@0:   for (i=0 ; i < 20 ; i++)
michael@0:     data+=data;
michael@0:   return data;
michael@0: }
michael@0: 
michael@0: function write_and_check(str, data, len)
michael@0: {
michael@0:   var written = str.write(data, len);
michael@0:   if (written != len) {
michael@0:     do_throw("str.write has not written all data!\n" +
michael@0:              "  Expected: " + len  + "\n" +
michael@0:              "  Actual: " + written + "\n");
michael@0:   }
michael@0: }
michael@0: 
michael@0: function write_datafile(status, entry)
michael@0: {
michael@0:   do_check_eq(status, Cr.NS_OK);
michael@0:   var os = entry.openOutputStream(0);
michael@0:   var data = gen_1MiB();
michael@0: 
michael@0:   write_and_check(os, data, data.length);
michael@0: 
michael@0:   os.close();
michael@0:   entry.close();
michael@0: 
michael@0:   // try to open the entry for appending
michael@0:   asyncOpenCacheEntry("http://data/",
michael@0:                       "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
michael@0:                       open_for_readwrite);
michael@0: }
michael@0: 
michael@0: function open_for_readwrite(status, entry)
michael@0: {
michael@0:   do_check_eq(status, Cr.NS_OK);
michael@0:   var os = entry.openOutputStream(entry.dataSize);
michael@0: 
michael@0:   // Opening the entry for appending data calls nsDiskCacheStreamIO::Seek()
michael@0:   // which initializes mFD. If no data is written then mBufDirty is false and
michael@0:   // mFD won't be closed in nsDiskCacheStreamIO::Flush().
michael@0: 
michael@0:   os.close();
michael@0:   entry.close();
michael@0: 
michael@0:   do_test_finished();
michael@0: }
michael@0: 
michael@0: function run_test() {
michael@0:   do_get_profile();
michael@0: 
michael@0:   // clear the cache
michael@0:   evict_cache_entries();
michael@0: 
michael@0:   asyncOpenCacheEntry("http://data/",
michael@0:                       "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
michael@0:                       write_datafile);
michael@0: 
michael@0:   do_test_pending();
michael@0: }