1 files changed, 53 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 0000000000..cbad8918ad
--- /dev/null
+++ b/netwerk/test/unit/test_cache2-25-chunk-memory-limit.js
@@ -0,0 +1,53 @@
+"use strict";
+
+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();
+
+  // set max chunks memory so that only one full chunk fits within the limit
+  Services.prefs.setIntPref("browser.cache.disk.max_chunks_memory_usage", 300);
+
+  asyncOpenCacheEntry(
+    "http://a/",
+    "disk",
+    Ci.nsICacheStorage.OPEN_NORMALLY,
+    null,
+    function (status, entry) {
+      Assert.equal(status, Cr.NS_OK);
+      var data = gen_200k();
+      oStr = entry.openOutputStream(0, data.length);
+      Assert.equal(data.length, oStr.write(data, data.length));
+
+      asyncOpenCacheEntry(
+        "http://b/",
+        "disk",
+        Ci.nsICacheStorage.OPEN_NORMALLY,
+        null,
+        function (status, entry) {
+          Assert.equal(status, Cr.NS_OK);
+          var oStr2 = entry.openOutputStream(0, data.length);
+          do_check_throws_nsIException(
+            () => oStr2.write(data, data.length),
+            "NS_ERROR_OUT_OF_MEMORY"
+          );
+          finish_cache2_test();
+        }
+      );
+    }
+  );
+
+  do_test_pending();
+}