Add test to ensure that URLs that redirect inside the PDF plugin fail to load

chrome/test/data/pdf/redirects_fail_test.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Load a plugin with the given paramaters.
+function createPluginForUrl(streamUrl, url, headers, progressCallback) {
+  var plugin = document.createElement('embed');
+    plugin.type = 'application/x-google-chrome-pdf';
+    plugin.addEventListener('message', function(message) {
+      switch (message.data.type.toString()) {
+        case 'loadProgress':
+          progressCallback(message.data.progress);
+        break;
+      }
+    }, false);
+
+    plugin.setAttribute('src', url);
+    plugin.setAttribute('stream-url', streamUrl);
+    plugin.setAttribute('full-frame', '');
+    plugin.setAttribute('headers', headers);
+    document.body.appendChild(plugin);
+}
+
+function parseUrl(url) {
+  var a = document.createElement("a");
+  a.href = url;
+  return a;
+};
+
+var tests = [
+  // Test that if the plugin is loaded with a URL that redirects it fails.
+  function redirectsFail() {
+    var url = parseUrl(viewer.originalUrl_);
+    var redirectUrl = url.origin + '/server-redirect?' + viewer.originalUrl_;
+    createPluginForUrl(redirectUrl, redirectUrl, '', function(progress) {
+      if (progress == -1)
+        chrome.test.succeed();
+      else
+        chrome.test.fail();
+    });
+  },
+
+  // Test that if the plugin is loaded with a URL that doesn't redirect but
+  // subsequent requests do redirect, it fails.
+  function partialRedirectsFail() {
+    var url = parseUrl(viewer.originalUrl_);
+    var redirectUrl = url.origin + '/server-redirect?' + viewer.originalUrl_;
+    // Set the headers manually so that the first request is made using a URL
+    // that doesn't redirect and subsequent requests are made using a URL that
+    // does.
+    var headers = 'Accept-Ranges: bytes\n' +
+                  'Content-Length: 101688487\n' +
+                  'Content-Type: application/pdf\n';
+    createPluginForUrl(viewer.originalUrl_, redirectUrl, headers,
+        function(progress) {
+          if (progress == -1)
+            chrome.test.succeed();
+          else
+            chrome.test.fail();
+        });
+  },
+
+  // Test that if the plugin is loaded with a URL that doesn't redirect, it
+  // succeeds.
+  function noRedirectsSucceed() {
+    createPluginForUrl(viewer.originalUrl_, viewer.originalUrl_, '',
+        function(progress) {
+          if (progress == 100)
+            chrome.test.succeed()
+        });
+  },
+];
+
+var scriptingAPI = new PDFScriptingAPI(window, window);
+scriptingAPI.setLoadCallback(function() {
+  chrome.test.runTests(tests);
+});