gecko/netwerk/test/unit/test_bug651100.js

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const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
function gen_1MiB()
{
var i;
var data="x";
for (i=0 ; i < 20 ; i++)
data+=data;
return data;
}
function write_and_check(str, data, len)
{
var written = str.write(data, len);
if (written != len) {
do_throw("str.write has not written all data!\n" +
" Expected: " + len + "\n" +
" Actual: " + written + "\n");
}
}
function write_big_datafile(status, entry)
{
do_check_eq(status, Cr.NS_OK);
var os = entry.openOutputStream(0);
var data = gen_1MiB();
// write 65MiB
var i;
for (i=0 ; i<65 ; i++)
write_and_check(os, data, data.length);
// another write should fail and the entry will be doomed
try {
write_and_check(os, data, data.length);
do_throw("write should fail");
} catch (e) {}
os.close();
entry.close();
// DoomEntry() is called while writing to the entry, but the data is really
// deleted (and the cache size updated) on the background thread when
// the entry is deactivated. We need to sync with the cache IO thread before
// we continue with the test.
syncWithCacheIOThread(run_test_2);
}
function write_big_metafile(status, entry)
{
do_check_eq(status, Cr.NS_OK);
var os = entry.openOutputStream(0);
var data = gen_1MiB();
// > 64MiB
var i;
for (i=0 ; i<65 ; i++)
entry.setMetaDataElement("metadata_"+i, data);
os.close();
entry.close();
// We don't check whether the cache is full while writing metadata. Also we
// write the metadata when closing the entry, so we need to write some data
// after closing this entry to invoke the cache cleanup.
asyncOpenCacheEntry("smalldata",
"HTTP",
Ci.nsICache.STORE_ON_DISK,
Ci.nsICache.ACCESS_WRITE,
write_and_doom_small_datafile);
}
function write_and_doom_small_datafile(status, entry)
{
do_check_eq(status, Cr.NS_OK);
var os = entry.openOutputStream(0);
var data = "0123456789";
write_and_check(os, data, data.length);
os.close();
entry.doom();
entry.close();
syncWithCacheIOThread(run_test_3);
}
function check_cache_size() {
var diskDeviceVisited;
var visitor = {
visitDevice: function (deviceID, deviceInfo) {
if (deviceID == "disk") {
diskDeviceVisited = true;
do_check_eq(deviceInfo.totalSize, 0)
}
return true;
},
visitEntry: function (deviceID, entryInfo) {
do_throw("unexpected call to visitEntry");
}
};
var cs = get_cache_service();
diskDeviceVisited = false;
cs.visitEntries(visitor);
do_check_true(diskDeviceVisited);
}
function run_test() {
var prefBranch = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
// set max entry size bigger than 64MiB
prefBranch.setIntPref("browser.cache.disk.max_entry_size", 65*1024);
// disk cache capacity must be at least 8 times bigger
prefBranch.setIntPref("browser.cache.disk.capacity", 8*65*1024);
// disable smart size
prefBranch.setBoolPref("browser.cache.disk.smart_size.enabled", false);
do_get_profile();
// clear the cache
evict_cache_entries();
// write an entry with data > 64MiB
asyncOpenCacheEntry("bigdata",
"HTTP",
Ci.nsICache.STORE_ON_DISK,
Ci.nsICache.ACCESS_WRITE,
write_big_datafile);
do_test_pending();
}
function run_test_2()
{
check_cache_size();
var prefBranch = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
// set cache capacity lower than max entry size (see comment in
// write_big_metafile)
prefBranch.setIntPref("browser.cache.disk.capacity", 64*1024);
// write an entry with metadata > 64MiB
asyncOpenCacheEntry("bigmetadata",
"HTTP",
Ci.nsICache.STORE_ON_DISK,
Ci.nsICache.ACCESS_WRITE,
write_big_metafile);
}
function run_test_3()
{
check_cache_size();
do_test_finished();
}