mozilla-central/dom/cache/test/mochitest/test_cache_orphaned_cache.html

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Test Info: Warnings

<!-- Any copyright is dedicated to the Public Domain.
<!DOCTYPE HTML>
<html>
<head>
<title>Test Cache with QuotaManager Restart</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="large_url_list.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<script class="testbody" type="text/javascript">
function setupTestIframe() {
return new Promise(function(resolve) {
var iframe = document.createElement("iframe");
iframe.src = "empty.html";
iframe.onload = function() {
window.caches = iframe.contentWindow.caches;
resolve();
};
document.body.appendChild(iframe);
});
}
function clearStorage() {
return new Promise(function(resolve) {
var qms = SpecialPowers.Services.qms;
var principal = SpecialPowers.wrap(document).nodePrincipal;
var request = qms.clearStoragesForPrincipal(principal);
var cb = SpecialPowers.wrapCallback(resolve);
request.callback = cb;
});
}
function storageUsage() {
return new Promise(function(resolve) {
var qms = SpecialPowers.Services.qms;
var principal = SpecialPowers.wrap(document).nodePrincipal;
var cb = SpecialPowers.wrapCallback(function(request) {
var result = request.result;
resolve(result.usage);
});
qms.getUsageForPrincipal(principal, cb);
});
}
function resetStorage() {
return new Promise(function(resolve) {
var qms = SpecialPowers.Services.qms;
var principal = SpecialPowers.wrap(document).nodePrincipal;
var request = qms.resetStoragesForPrincipal(principal);
var cb = SpecialPowers.wrapCallback(resolve);
request.callback = cb;
});
}
function gc() {
return new Promise(function(resolve) {
SpecialPowers.exactGC(resolve);
});
}
SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv({
"set": [["dom.caches.enabled", true],
["dom.caches.testing.enabled", true],
["dom.quotaManager.testing", true]],
}, function() {
var name = "toBeOrphaned";
var cache = null;
var initialUsage = 0;
var fullUsage = 0;
var endUsage = 0;
var url = "test_cache_add.js";
// start from a fresh origin directory so other tests do not influence our
// results
setupTestIframe().then(function() {
return clearStorage();
}).then(function() {
return storageUsage();
}).then(function(usage) {
is(0, usage, "disk usage should be zero to start");
})
// Initialize and populate an initial cache to get the base sqlite pages
// and directory structure allocated.
.then(function() {
return caches.open(name);
}).then(function(c) {
return c.add(url);
}).then(function() {
return gc();
}).then(function() {
return caches.delete(name);
}).then(function(deleted) {
ok(deleted, "cache should be deleted");
// This is a bit superfluous, but its necessary to make sure the Cache is
// fully deleted before we proceed. The deletion actually takes place in
// two async steps. We don't want to resetStorage() until the second step
// has taken place. This extra Cache operation ensure that all the
// runnables have been flushed through the threads, etc.
return caches.has(name);
})
// Now measure initial disk usage
.then(function() {
return resetStorage();
}).then(function() {
return storageUsage();
}).then(function(usage) {
initialUsage = usage;
})
// Now re-populate the Cache object
.then(function() {
return caches.open(name);
}).then(function(c) {
cache = c;
return cache.add(url);
}).then(function() {
return caches.delete(name);
}).then(function(deleted) {
ok(deleted, "cache should be deleted");
})
// Reset the quota dir while the cache is deleted, but still referenced
// from the DOM. This forces it to be orphaned.
.then(function() {
return resetStorage();
}).then(function() {
return storageUsage();
}).then(function(usage) {
fullUsage = usage;
ok(fullUsage > initialUsage, "disk usage should have grown");
})
// Now perform a new Cache operation that will reopen the origin. This
// should clean up the orphaned Cache data.
.then(function() {
return caches.has(name);
}).then(function(result) {
ok(!result, "cache should not exist in storage");
})
// Finally, verify orphaned data was cleaned up by re-checking the disk
// usage. Reset the storage first to ensure any WAL transaction files
// are flushed before measuring the usage.
.then(function() {
return resetStorage();
}).then(function() {
return storageUsage();
}).then(function(usage) {
endUsage = usage;
dump("### ### initial:" + initialUsage + ", full:" + fullUsage +
", end:" + endUsage + "\n");
ok(endUsage < fullUsage, "disk usage should have shrank");
is(endUsage, initialUsage, "disk usage should return to original");
SimpleTest.finish();
});
});
</script>
</body>
</html>