1 files changed, 99 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_compressappend.js b/netwerk/test/unit/test_compressappend.js
new file mode 100644
index 0000000000..1374eb01ab
--- /dev/null
+++ b/netwerk/test/unit/test_compressappend.js
@@ -0,0 +1,99 @@
+//
+// Test that data can be appended to a cache entry even when the data is
+// compressed by the cache compression feature - bug 648429.
+//
+
+"use strict";
+
+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() {
+    evict_cache_entries();
+    asyncOpenCacheEntry(
+      "http://data/",
+      "disk",
+      Ci.nsICacheStorage.OPEN_NORMALLY,
+      null,
+      this.writeData.bind(this)
+    );
+  },
+
+  writeData(status, entry) {
+    Assert.equal(status, Cr.NS_OK);
+    if (this._compress) {
+      entry.setMetaDataElement("uncompressed-len", "0");
+    }
+    var os = entry.openOutputStream(0, 5);
+    write_and_check(os, "12345", 5);
+    os.close();
+    entry.close();
+    asyncOpenCacheEntry(
+      "http://data/",
+      "disk",
+      Ci.nsICacheStorage.OPEN_NORMALLY,
+      null,
+      this.appendData.bind(this)
+    );
+  },
+
+  appendData(status, entry) {
+    Assert.equal(status, Cr.NS_OK);
+    var os = entry.openOutputStream(entry.storageDataSize, 5);
+    write_and_check(os, "abcde", 5);
+    os.close();
+    entry.close();
+
+    asyncOpenCacheEntry(
+      "http://data/",
+      "disk",
+      Ci.nsICacheStorage.OPEN_READONLY,
+      null,
+      this.checkData.bind(this)
+    );
+  },
+
+  checkData(status, entry) {
+    Assert.equal(status, Cr.NS_OK);
+    var self = this;
+    pumpReadStream(entry.openInputStream(0), function(str) {
+      Assert.equal(str.length, 10);
+      Assert.equal(str, "12345abcde");
+      entry.close();
+
+      executeSoon(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);
+}