1 files changed, 90 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_stale-while-revalidate_negative.js b/netwerk/test/unit/test_stale-while-revalidate_negative.js
new file mode 100644
index 0000000000..51648a0a9b
--- /dev/null
+++ b/netwerk/test/unit/test_stale-while-revalidate_negative.js
@@ -0,0 +1,90 @@
+/*
+
+Tests the Cache-control: stale-while-revalidate response directive.
+
+Purpose is to check we DON'T perform the background revalidation when we make the
+request past the reval window.
+
+* Make request #1.
+  - response is from the server and version=1
+  - max-age=1, stale-while-revalidate=1
+* Switch version of the data on the server.
+* Make request #2 in 3 seconds (entry should be expired by that time and no longer
+  fall into the reval window.)
+  - response is from the server, version=2
+* Done.
+
+*/
+
+"use strict";
+
+const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
+
+let max_age;
+let version;
+let generate_response = ver => `response version=${ver}`;
+
+function test_handler(metadata, response) {
+  const originalBody = generate_response(version);
+  response.setHeader("Content-Type", "text/html", false);
+  response.setHeader(
+    "Cache-control",
+    `max-age=${max_age}, stale-while-revalidate=1`,
+    false
+  );
+  response.setStatusLine(metadata.httpVersion, 200, "OK");
+  response.bodyOutputStream.write(originalBody, originalBody.length);
+}
+
+function make_channel(url) {
+  return NetUtil.newChannel({
+    uri: url,
+    loadUsingSystemPrincipal: true,
+  }).QueryInterface(Ci.nsIHttpChannel);
+}
+
+async function get_response(channel, fromCache) {
+  return new Promise(resolve => {
+    channel.asyncOpen(
+      new ChannelListener((request, buffer, ctx, isFromCache) => {
+        ok(fromCache == isFromCache, `got response from cache = ${fromCache}`);
+        resolve(buffer);
+      })
+    );
+  });
+}
+
+async function sleep(time) {
+  return new Promise(resolve => {
+    do_timeout(time * 1000, resolve);
+  });
+}
+
+async function stop_server(httpserver) {
+  return new Promise(resolve => {
+    httpserver.stop(resolve);
+  });
+}
+
+add_task(async function () {
+  let httpserver = new HttpServer();
+  httpserver.registerPathHandler("/testdir", test_handler);
+  httpserver.start(-1);
+  const PORT = httpserver.identity.primaryPort;
+  const URI = `http://localhost:${PORT}/testdir`;
+
+  let response;
+
+  version = 1;
+  max_age = 1;
+  response = await get_response(make_channel(URI), false);
+  ok(response == generate_response(1), "got response ver 1");
+
+  await sleep(max_age + 1 /* stale window */ + 1 /* to expire the window */);
+
+  version = 2;
+  response = await get_response(make_channel(URI), false);
+  ok(response == generate_response(2), "got response ver 2");
+
+  await stop_server(httpserver);
+});