Display DNS probe results.

chrome/browser/net/net_error_tab_helper_unittest.cc

+// Copyright (c) 2013 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/net_error_tab_helper.h"
+
+#include "base/message_loop.h"
+#include "chrome/common/net/net_error_info.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/common/page_transition_types.h"
+#include "content/public/test/test_browser_thread.h"
+#include "net/base/net_errors.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using base::MessageLoop;
+using chrome_browser_net::NetErrorTabHelper;
+using chrome_common_net::DnsProbeStatus;
+using content::BrowserThread;
+using content::TestBrowserThread;
+
+class TestNetErrorTabHelper : public NetErrorTabHelper {
+ public:
+  TestNetErrorTabHelper()
+      : NetErrorTabHelper(NULL),
+        mock_probe_running_(false),
+        last_status_sent_(chrome_common_net::DNS_PROBE_MAX),
+        mock_sent_count_(0) {}
+
+  void FinishProbe(DnsProbeStatus status) {
+    EXPECT_TRUE(mock_probe_running_);
+    OnDnsProbeFinished(status);
+    mock_probe_running_ = false;
+  }
+
+  bool mock_probe_running() const { return mock_probe_running_; }
+  DnsProbeStatus last_status_sent() const { return last_status_sent_; }
+  int mock_sent_count() const { return mock_sent_count_; }
+
+ private:
+  virtual void StartDnsProbe() OVERRIDE {
+    EXPECT_FALSE(mock_probe_running_);
+    mock_probe_running_ = true;
+  }
+
+  virtual void SendInfo() OVERRIDE {
+    last_status_sent_ = dns_probe_status();
+    mock_sent_count_++;
+  }
+
+  bool mock_probe_running_;
+  DnsProbeStatus last_status_sent_;
+  int mock_sent_count_;
+};
+
+class NetErrorTabHelperTest : public testing::Test {
+ protected:
+  enum MainFrame { SUB_FRAME, MAIN_FRAME };
+  enum ErrorPage { NORMAL_PAGE, ERROR_PAGE };
+  enum ErrorType { DNS_ERROR, OTHER_ERROR };
+
+  NetErrorTabHelperTest()
+      : fake_ui_thread_(BrowserThread::UI, &message_loop_) {
+    NetErrorTabHelper::set_state_for_testing(
+        NetErrorTabHelper::TESTING_FORCE_ENABLED);
+  }
+
+  void StartProvisionalLoad(MainFrame main_frame, ErrorPage error_page) {
+    tab_helper_.DidStartProvisionalLoadForFrame(
+        1,  // frame_id
+        0,  // parent_frame_id
+        (main_frame == MAIN_FRAME),
+        bogus_url_,  // validated_url
+        (error_page == ERROR_PAGE),
+        false,  // is_iframe_srcdoc
+        NULL);  // render_view_host
+  }
+
+  void CommitProvisionalLoad(MainFrame main_frame) {
+    tab_helper_.DidCommitProvisionalLoadForFrame(
+        1,  // frame id
+        (main_frame == MAIN_FRAME),
+        bogus_url_,  // url
+        content::PAGE_TRANSITION_TYPED,
+        NULL);  // render_view_host
+  }
+
+  void FailProvisionalLoad(MainFrame main_frame, ErrorType error_type) {
+    int net_error;
+
+    if (error_type == DNS_ERROR)
+      net_error = net::ERR_NAME_NOT_RESOLVED;
+    else
+      net_error = net::ERR_TIMED_OUT;
+
+    tab_helper_.DidFailProvisionalLoad(
+        1,  // frame id
+        (main_frame == MAIN_FRAME),
+        bogus_url_,  // validated_url
+        net_error,
+        string16(),
+        NULL);  // render_view_host
+  }
+
+  void FinishProbe(DnsProbeStatus status) {
+    tab_helper_.FinishProbe(status);
+  }
+
+  bool probe_running() { return tab_helper_.mock_probe_running(); }
+  DnsProbeStatus last_status_sent() { return tab_helper_.last_status_sent(); }
+  int sent_count() { return tab_helper_.mock_sent_count(); }
+
+ private:
+  MessageLoop message_loop_;
+  TestBrowserThread fake_ui_thread_;
+  TestNetErrorTabHelper tab_helper_;
+  GURL bogus_url_;
+};
+
+TEST_F(NetErrorTabHelperTest, Null) {
+  EXPECT_FALSE(probe_running());
+}
+
+TEST_F(NetErrorTabHelperTest, MainFrameNonDnsError) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, OTHER_ERROR);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(0, sent_count());
+}
+
+TEST_F(NetErrorTabHelperTest, NonMainFrameDnsError) {
+  StartProvisionalLoad(SUB_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(SUB_FRAME, DNS_ERROR);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(0, sent_count());
+}
+
+// Test full-blown DNS error page loads.  Note that the helper (can) see two

[mmenke, 2013/07/15 16:33:22]

optional nit: Not sure what meaning "full-blown" adds, also a bit concerned
about non-native speakers not knowing the idiomatic expression.  Maybe just
"full"?

[Deprecated (see juliatuttle), 2013/07/15 19:33:38]

Done.

+// error page loads: Link Doctor loads an empty HTML page so the user knows
+// something is going on, then fails over to the normal error page if and when
+// Link Doctor fails to load or declines to provide a page.
+
+TEST_F(NetErrorTabHelperTest, ProbeResponseBeforeFirstCommit) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(1, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+}
+
+TEST_F(NetErrorTabHelperTest, ProbeResponseBetweenFirstAndSecondCommit) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(2, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(3, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+}
+
+TEST_F(NetErrorTabHelperTest, ProbeResponseAfterSecondCommit) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(3, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+}
+
+// Send result even if a new page load has started; the error page is still
+// visible, and the user might cancel the load.
+TEST_F(NetErrorTabHelperTest, ProbeResponseAfterNewStart) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(3, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+}
+
+// Don't send result if a new page has committed; the result would go to the
+// wrong page, and the error page is gone anyway.
+TEST_F(NetErrorTabHelperTest, ProbeResponseAfterNewCommit) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(2, sent_count());
+}
+
+TEST_F(NetErrorTabHelperTest, MultipleDnsErrorsWithProbesWithoutErrorPages) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NO_INTERNET);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(0, sent_count());
+}
+
+TEST_F(NetErrorTabHelperTest, MultipleDnsErrorsWithProbesAndErrorPages) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(0, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(3, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NO_INTERNET);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(4, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NO_INTERNET,
+            last_status_sent());
+}
+
+// If multiple DNS errors occur in a row before a probe result, don't start
+// multiple probes.
+TEST_F(NetErrorTabHelperTest, CoalesceFailures) {
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(1, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(2, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  StartProvisionalLoad(MAIN_FRAME, NORMAL_PAGE);
+  FailProvisionalLoad(MAIN_FRAME, DNS_ERROR);
+  StartProvisionalLoad(MAIN_FRAME, ERROR_PAGE);
+  CommitProvisionalLoad(MAIN_FRAME);
+  EXPECT_TRUE(probe_running());
+  EXPECT_EQ(3, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_STARTED, last_status_sent());
+
+  FinishProbe(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN);
+  EXPECT_FALSE(probe_running());
+  EXPECT_EQ(4, sent_count());
+  EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN, last_status_sent());
+}