1 files changed, 91 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_bug654926.js b/netwerk/test/unit/test_bug654926.js
new file mode 100644
index 0000000000..0f29a3bcf4
--- /dev/null
+++ b/netwerk/test/unit/test_bug654926.js
@@ -0,0 +1,91 @@
+"use strict";
+
+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) {
+  Assert.equal(status, Cr.NS_OK);
+  var data = gen_1MiB();
+  var os = entry.openOutputStream(0, data.length);
+
+  // 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
+  Services.prefs.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) {
+  Assert.equal(status, Cr.NS_OK);
+  var os = entry.openOutputStream(entry.dataSize, -1);
+  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();
+}