Add content_browsertests for testing cache control flags

content/browser/loader/reload_cache_control_browsertest.cc

+// 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.
+
+#include <memory>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/files/file_path.h"
+#include "content/public/test/content_browser_test.h"
+#include "content/public/test/content_browser_test_utils.h"
+#include "content/shell/browser/shell.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
+#include "net/test/embedded_test_server/http_request.h"
+#include "net/test/embedded_test_server/http_response.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace content {
+
+namespace {
+
+using net::test_server::HttpRequest;
+using net::test_server::HttpResponse;
+
+const char kReloadTestPath[] = "/loader/reload.html";
+const char kReloadImagePath[] = "/loader/empty16x16.png";
+
+const char kNoCacheControl[] = "";
+const char kMaxAgeCacheControl[] = "max-age=0";
+const char kNoCacheCacheControl[] = "no-cache";
+
+struct RequestLog {
+  std::string relative_url;
+  std::string cache_control;
+};
+
+class ReloadCacheControlBrowserTest : public ContentBrowserTest {
+ protected:
+  ReloadCacheControlBrowserTest() = default;
+  ~ReloadCacheControlBrowserTest() override = default;
+
+  void SetUpOnMainThread() override {
+    // ContentBrowserTest creates embedded_test_server instance with
+    // a registered HandleFileRequest for "content/test/data".
+    // Because the handler is registered as the first handler, MonitorHandler
+    // is needed to capture all requests.
+    embedded_test_server()->RegisterRequestMonitor(base::Bind(
+        &ReloadCacheControlBrowserTest::MonitorRequestHandler, this));
+
+    ASSERT_TRUE(embedded_test_server()->Start());
+  }
+
+ protected:
+  std::vector<RequestLog> request_log_;
+
+ private:
+  void MonitorRequestHandler(const HttpRequest& request) {
+    RequestLog log;
+    log.relative_url = request.relative_url;
+    auto cache_control = request.headers.find("Cache-Control");
+    log.cache_control = cache_control == request.headers.end()
+                            ? kNoCacheControl
+                            : cache_control->second;
+    request_log_.push_back(log);
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ReloadCacheControlBrowserTest);
+};
+
+IN_PROC_BROWSER_TEST_F(ReloadCacheControlBrowserTest, NormalReload) {
+  GURL url(embedded_test_server()->GetURL(kReloadTestPath));
+
+  EXPECT_TRUE(NavigateToURL(shell(), url));
+  ReloadBlockUntilNavigationsComplete(shell(), 1);
+
+  ASSERT_EQ(4UL, request_log_.size());
+  EXPECT_EQ(kReloadTestPath, request_log_[0].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[1].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[1].cache_control);
+
+  EXPECT_EQ(kReloadTestPath, request_log_[2].relative_url);
+  EXPECT_EQ(kMaxAgeCacheControl, request_log_[2].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[3].relative_url);
+  EXPECT_EQ(kMaxAgeCacheControl, request_log_[3].cache_control);
+}
+
+IN_PROC_BROWSER_TEST_F(ReloadCacheControlBrowserTest, BypassingReload) {
+  GURL url(embedded_test_server()->GetURL(kReloadTestPath));
+
+  EXPECT_TRUE(NavigateToURL(shell(), url));
+  ReloadBypassingCacheBlockUntilNavigationsComplete(shell(), 1);
+
+  ASSERT_EQ(4UL, request_log_.size());
+  EXPECT_EQ(kReloadTestPath, request_log_[0].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[1].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[1].cache_control);
+
+  EXPECT_EQ(kReloadTestPath, request_log_[2].relative_url);
+  EXPECT_EQ(kNoCacheCacheControl, request_log_[2].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[3].relative_url);
+  EXPECT_EQ(kNoCacheCacheControl, request_log_[3].cache_control);
+}
+
+}  // namespace
+
+}  // namespace content