1 files changed, 207 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_alt-data_overwrite.js b/netwerk/test/unit/test_alt-data_overwrite.js
new file mode 100644
index 0000000000..bf8a2775a7
--- /dev/null
+++ b/netwerk/test/unit/test_alt-data_overwrite.js
@@ -0,0 +1,207 @@
+/**
+ * Test for overwriting the alternative data in a cache entry.
+ *
+ * - run_test loads a new channel
+ * - readServerContent checks the content, and saves alt-data
+ * - cacheFlushObserver creates a new channel with "text/binary" alt-data type
+ * - readAltContent checks that it gets back alt-data and creates a channel with the dummy/null alt-data type
+ * - readServerContent2 checks that it gets regular content, from the cache and tries to overwrite the alt-data with the same representation
+ * - cacheFlushObserver2 creates a new channel with "text/binary" alt-data type
+ * - readAltContent2 checks that it gets back alt-data, and tries to overwrite with a kind of alt-data
+ * - cacheFlushObserver3 creates a new channel with "text/binary2" alt-data type
+ * - readAltContent3 checks that it gets back the newly saved alt-data
+ */
+
+"use strict";
+
+const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
+
+XPCOMUtils.defineLazyGetter(this, "URL", function () {
+  return "http://localhost:" + httpServer.identity.primaryPort + "/content";
+});
+
+let httpServer = null;
+
+function make_and_open_channel(url, altContentType, callback) {
+  let chan = NetUtil.newChannel({ uri: url, loadUsingSystemPrincipal: true });
+  if (altContentType) {
+    let cc = chan.QueryInterface(Ci.nsICacheInfoChannel);
+    cc.preferAlternativeDataType(
+      altContentType,
+      "",
+      Ci.nsICacheInfoChannel.ASYNC
+    );
+  }
+  chan.asyncOpen(new ChannelListener(callback, null));
+}
+
+const responseContent = "response body";
+const altContent = "!@#$%^&*()";
+const altContentType = "text/binary";
+const altContent2 = "abc";
+const altContentType2 = "text/binary2";
+
+let servedNotModified = false;
+
+function contentHandler(metadata, response) {
+  response.setHeader("Content-Type", "text/plain");
+  response.setHeader("Cache-Control", "no-cache");
+  response.setHeader("ETag", "test-etag1");
+  let etag = "";
+  try {
+    etag = metadata.getHeader("If-None-Match");
+  } catch (ex) {
+    etag = "";
+  }
+
+  if (etag == "test-etag1") {
+    response.setStatusLine(metadata.httpVersion, 304, "Not Modified");
+    servedNotModified = true;
+  } else {
+    servedNotModified = false;
+    response.bodyOutputStream.write(responseContent, responseContent.length);
+  }
+}
+
+function run_test() {
+  do_get_profile();
+  httpServer = new HttpServer();
+  httpServer.registerPathHandler("/content", contentHandler);
+  httpServer.start(-1);
+
+  do_test_pending();
+  make_and_open_channel(URL, altContentType, readServerContent);
+}
+
+function readServerContent(request, buffer) {
+  let cc = request.QueryInterface(Ci.nsICacheInfoChannel);
+
+  Assert.equal(buffer, responseContent);
+  Assert.equal(cc.alternativeDataType, "");
+
+  executeSoon(() => {
+    let os = cc.openAlternativeOutputStream(altContentType, altContent.length);
+    os.write(altContent, altContent.length);
+    os.close();
+
+    executeSoon(flushAndOpenAltChannel);
+  });
+}
+
+function flushAndOpenAltChannel() {
+  // We need to do a GC pass to ensure the cache entry has been freed.
+  Cu.forceShrinkingGC();
+  Services.cache2.QueryInterface(Ci.nsICacheTesting).flush(cacheFlushObserver);
+}
+
+// needs to be rooted
+let cacheFlushObserver = {
+  observe() {
+    if (!cacheFlushObserver) {
+      info("ignoring cacheFlushObserver\n");
+      return;
+    }
+    cacheFlushObserver = null;
+    Cu.forceShrinkingGC();
+    make_and_open_channel(URL, altContentType, readAltContent);
+  },
+};
+
+function readAltContent(request, buffer, closure, fromCache) {
+  Cu.forceShrinkingGC();
+  let cc = request.QueryInterface(Ci.nsICacheInfoChannel);
+
+  Assert.equal(fromCache || servedNotModified, true);
+  Assert.equal(cc.alternativeDataType, altContentType);
+  Assert.equal(buffer, altContent);
+
+  make_and_open_channel(URL, "dummy/null", readServerContent2);
+}
+
+function readServerContent2(request, buffer, closure, fromCache) {
+  Cu.forceShrinkingGC();
+  let cc = request.QueryInterface(Ci.nsICacheInfoChannel);
+
+  Assert.equal(fromCache || servedNotModified, true);
+  Assert.equal(buffer, responseContent);
+  Assert.equal(cc.alternativeDataType, "");
+
+  executeSoon(() => {
+    let os = cc.openAlternativeOutputStream(altContentType, altContent.length);
+    os.write(altContent, altContent.length);
+    os.close();
+
+    executeSoon(flushAndOpenAltChannel2);
+  });
+}
+
+function flushAndOpenAltChannel2() {
+  // We need to do a GC pass to ensure the cache entry has been freed.
+  Cu.forceShrinkingGC();
+  Services.cache2.QueryInterface(Ci.nsICacheTesting).flush(cacheFlushObserver2);
+}
+
+// needs to be rooted
+let cacheFlushObserver2 = {
+  observe() {
+    if (!cacheFlushObserver2) {
+      info("ignoring cacheFlushObserver2\n");
+      return;
+    }
+    cacheFlushObserver2 = null;
+    Cu.forceShrinkingGC();
+    make_and_open_channel(URL, altContentType, readAltContent2);
+  },
+};
+
+function readAltContent2(request, buffer, closure, fromCache) {
+  Cu.forceShrinkingGC();
+  let cc = request.QueryInterface(Ci.nsICacheInfoChannel);
+
+  Assert.equal(servedNotModified || fromCache, true);
+  Assert.equal(cc.alternativeDataType, altContentType);
+  Assert.equal(buffer, altContent);
+
+  executeSoon(() => {
+    Cu.forceShrinkingGC();
+    info("writing other content\n");
+    let os = cc.openAlternativeOutputStream(
+      altContentType2,
+      altContent2.length
+    );
+    os.write(altContent2, altContent2.length);
+    os.close();
+
+    executeSoon(flushAndOpenAltChannel3);
+  });
+}
+
+function flushAndOpenAltChannel3() {
+  // We need to do a GC pass to ensure the cache entry has been freed.
+  Cu.forceShrinkingGC();
+  Services.cache2.QueryInterface(Ci.nsICacheTesting).flush(cacheFlushObserver3);
+}
+
+// needs to be rooted
+let cacheFlushObserver3 = {
+  observe() {
+    if (!cacheFlushObserver3) {
+      info("ignoring cacheFlushObserver3\n");
+      return;
+    }
+
+    cacheFlushObserver3 = null;
+    Cu.forceShrinkingGC();
+    make_and_open_channel(URL, altContentType2, readAltContent3);
+  },
+};
+
+function readAltContent3(request, buffer, closure, fromCache) {
+  let cc = request.QueryInterface(Ci.nsICacheInfoChannel);
+
+  Assert.equal(servedNotModified || fromCache, true);
+  Assert.equal(cc.alternativeDataType, altContentType2);
+  Assert.equal(buffer, altContent2);
+
+  httpServer.stop(do_test_finished);
+}