1 files changed, 80 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_compressappend.js b/netwerk/test/unit/test_compressappend.js
new file mode 100644
index 000000000..275c94433
--- /dev/null
+++ b/netwerk/test/unit/test_compressappend.js
@@ -0,0 +1,80 @@
+//
+// Test that data can be appended to a cache entry even when the data is 
+// compressed by the cache compression feature - bug 648429.
+//
+
+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 TestAppend(compress, callback)
+{
+  this._compress = compress;
+  this._callback = callback;
+  this.run();
+}
+
+TestAppend.prototype = {
+  _compress: false,
+  _callback: null,
+
+  run: function() {
+    evict_cache_entries();
+    asyncOpenCacheEntry("http://data/",
+                        "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+                        this.writeData.bind(this));
+  },
+
+  writeData: function(status, entry) {
+    do_check_eq(status, Cr.NS_OK);
+    if (this._compress)
+      entry.setMetaDataElement("uncompressed-len", "0");
+    var os = entry.openOutputStream(0);
+    write_and_check(os, "12345", 5);
+    os.close();
+    entry.close();
+    asyncOpenCacheEntry("http://data/",
+                        "disk", Ci.nsICacheStorage.OPEN_NORMALLY, null,
+                        this.appendData.bind(this));
+  },
+
+  appendData: function(status, entry) {
+    do_check_eq(status, Cr.NS_OK);
+    var os = entry.openOutputStream(entry.storageDataSize);
+    write_and_check(os, "abcde", 5);
+    os.close();
+    entry.close();
+
+    asyncOpenCacheEntry("http://data/",
+                        "disk", Ci.nsICacheStorage.OPEN_READONLY, null,
+                        this.checkData.bind(this));
+  },
+
+  checkData: function(status, entry) {
+    do_check_eq(status, Cr.NS_OK);
+    var self = this;
+    pumpReadStream(entry.openInputStream(0), function(str) {
+      do_check_eq(str.length, 10);
+      do_check_eq(str, "12345abcde");
+      entry.close();
+
+      do_execute_soon(self._callback);
+    });
+  }
+};
+
+function run_test() {
+  do_get_profile();
+  new TestAppend(false, run_test2);
+  do_test_pending();
+}
+
+function run_test2() {
+  new TestAppend(true, do_test_finished);
+}