Enforce SafetyMode for YouTube if prefs::kForceSafeSearch is on.

chrome/browser/net/safe_search_util_unittest.cc

+// Copyright (c) 2014 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.
+
+#include "chrome/browser/net/safe_search_util.h"
+
+#include "base/message_loop/message_loop.h"
+#include "base/strings/string_piece.h"
+#include "net/http/http_request_headers.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+class SafeSearchUtilTest : public ::testing::Test {
+ protected:
+  SafeSearchUtilTest() {}
+  virtual ~SafeSearchUtilTest() {}
+
+  scoped_ptr<net::URLRequest> CreateYoutubeRequest() {
+    return context_.CreateRequest(GURL("http://www.youtube.com"),
+                                  net::DEFAULT_PRIORITY,
+                                  NULL,
+                                  NULL);
+  }
+
+  scoped_ptr<net::URLRequest> CreateNonYoutubeRequest() {
+    return context_.CreateRequest(GURL("http://www.notyoutube.com"),
+                                  net::DEFAULT_PRIORITY,
+                                  NULL,
+                                  NULL);
+  }
+
+  static void SetCookie(net::HttpRequestHeaders* headers,
+                        const std::string& value) {
+    headers->SetHeader(base::StringPiece(net::HttpRequestHeaders::kCookie),
+                       base::StringPiece(value));
+  }
+
+  static void CheckHeaders(net::URLRequest* request,
+                           const std::string& header_string_original,
+                           const std::string& header_string_expected) {
+    net::HttpRequestHeaders headers;
+    SetCookie(&headers, header_string_original);
+    safe_search_util::ForceYouTubeSafetyMode(request, &headers);
+
+    net::HttpRequestHeaders headers_expected;
+    SetCookie(&headers_expected, header_string_expected);
+    EXPECT_EQ(headers_expected.ToString(), headers.ToString());
+  }
+
+  base::MessageLoop message_loop_;
+  net::TestURLRequestContext context_;
+};
+
+// ForceGoogleSafeSearch is already tested quite extensively in
+// ChromeNetworkDelegateSafeSearchTest (in chrome_network_delegate_unittest.cc),
+// so we won't test it again here.
+
+TEST_F(SafeSearchUtilTest, CreateYoutubePrefCookie) {
+  scoped_ptr<net::URLRequest> request = CreateYoutubeRequest();
+  CheckHeaders(request.get(),
+               "OtherCookie=value",
+               "OtherCookie=value; PREF=f2=8000000");
+}
+
+TEST_F(SafeSearchUtilTest, ModifyYoutubePrefCookie) {
+  scoped_ptr<net::URLRequest> request = CreateYoutubeRequest();
+  CheckHeaders(request.get(),
+               "PREF=f1=123; OtherCookie=value",
+               "PREF=f1=123&f2=8000000; OtherCookie=value");
+  CheckHeaders(request.get(),
+               "PREF=",
+               "PREF=f2=8000000");
+  CheckHeaders(request.get(),
+               "PREF=\"\"",
+               "PREF=\"f2=8000000\"");
+  CheckHeaders(request.get(),
+               "PREF=f1=123&f2=4321&foo=bar",
+               "PREF=f1=123&f2=8004321&foo=bar");
+  CheckHeaders(request.get(),
+               "PREF=\"f1=1&f2=4321\"; OtherCookie=value",
+               "PREF=\"f1=1&f2=8004321\"; OtherCookie=value");
+}
+
+TEST_F(SafeSearchUtilTest, DoesntTouchNonYoutubeURL) {
+  scoped_ptr<net::URLRequest> request = CreateNonYoutubeRequest();
+  CheckHeaders(request.get(),
+               "PREF=f2=0",
+               "PREF=f2=0");
+}