1 files changed, 88 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_bug654926.js b/netwerk/test/unit/test_bug654926.js
new file mode 100644
index 000000000..83fd7286f
--- /dev/null
+++ b/netwerk/test/unit/test_bug654926.js
@@ -0,0 +1,88 @@
+var _PSvc;
+function get_pref_service() {
+  if (_PSvc)
+    return _PSvc;
+
+  return _PSvc = Cc["@mozilla.org/preferences-service;1"].
+                 getService(Ci.nsIPrefBranch);
+}
+
+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_datafile(status, entry)
+{
+  do_check_eq(status, Cr.NS_OK);
+  var os = entry.openOutputStream(0);
+  var data = gen_1MiB();
+
+  // write 2MiB
+  var i;
+  for (i=0 ; i<2 ; i++)
+    write_and_check(os, data, data.length);
+
+  os.close();
+  entry.close();
+
+  // now change max_entry_size so that the existing entry is too big
+  get_pref_service().setIntPref("browser.cache.disk.max_entry_size", 1024);
+
+  // append to entry
+  asyncOpenCacheEntry("http://data/",
+                      "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+                      append_datafile);
+}
+
+function append_datafile(status, entry)
+{
+  do_check_eq(status, Cr.NS_OK);
+  var os = entry.openOutputStream(entry.dataSize);
+  var data = gen_1MiB();
+
+  // append 1MiB
+  try {
+    write_and_check(os, data, data.length);
+    do_throw();
+  }
+  catch (ex) { }
+
+  // closing the ostream should fail in this case
+  try {
+    os.close();
+    do_throw();
+  }
+  catch (ex) { }
+
+  entry.close();
+
+  do_test_finished();
+}
+
+function run_test() {
+  do_get_profile();
+
+  // clear the cache
+  evict_cache_entries();
+
+  asyncOpenCacheEntry("http://data/",
+                      "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+                      write_datafile);
+
+  do_test_pending();
+}