1 files changed, 51 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_cache2-25-chunk-memory-limit.js b/netwerk/test/unit/test_cache2-25-chunk-memory-limit.js
new file mode 100644
index 000000000..0999dc8d2
--- /dev/null
+++ b/netwerk/test/unit/test_cache2-25-chunk-memory-limit.js
@@ -0,0 +1,51 @@
+Components.utils.import('resource://gre/modules/LoadContextInfo.jsm');
+
+function gen_200k()
+{
+  var i;
+  var data="0123456789ABCDEFGHIJLKMNO";
+  for (i=0; i<13; i++)
+    data+=data;
+  return data;
+}
+
+// Keep the output stream of the first entry in a global variable, so the
+// CacheFile and its buffer isn't released before we write the data to the
+// second entry.
+var oStr;
+
+function run_test()
+{
+  do_get_profile();
+
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test doesn't run when the old cache back end is used since the behavior is different");
+    return;
+  }
+
+  var prefBranch = Cc["@mozilla.org/preferences-service;1"].
+                     getService(Ci.nsIPrefBranch);
+
+  // set max chunks memory so that only one full chunk fits within the limit
+  prefBranch.setIntPref("browser.cache.disk.max_chunks_memory_usage", 300);
+
+  asyncOpenCacheEntry("http://a/", "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+    function(status, entry) {
+      do_check_eq(status, Cr.NS_OK);
+      oStr = entry.openOutputStream(0);
+      var data = gen_200k();
+      do_check_eq(data.length, oStr.write(data, data.length));
+
+      asyncOpenCacheEntry("http://b/", "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+        function(status, entry) {
+          do_check_eq(status, Cr.NS_OK);
+          var oStr2 = entry.openOutputStream(0);
+          do_check_throws_nsIException(() => oStr2.write(data, data.length), 'NS_ERROR_OUT_OF_MEMORY');
+          finish_cache2_test();
+        }
+      );
+    }
+  );
+
+  do_test_pending();
+}