// Copyright 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 <stdint.h>

#include "base/command_line.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/site_isolation_policy.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/test_navigation_observer.h"
#include "content/shell/browser/shell.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/url_request/url_request_failed_job.h"
#include "url/gurl.h"

namespace content {

class BrowserSideNavigationBrowserTest : public ContentBrowserTest {
 public:
  BrowserSideNavigationBrowserTest() {}

 protected:
  void SetUpCommandLine(base::CommandLine* command_line) override {
    command_line->AppendSwitch(switches::kEnableBrowserSideNavigation);
  }

  void SetUpOnMainThread() override {
    host_resolver()->AddRule("*", "127.0.0.1");
    ASSERT_TRUE(embedded_test_server()->Start());
  }
};

// Ensure that browser initiated basic navigations work with browser side
// navigation.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
                       BrowserInitiatedNavigations) {
  // Perform a navigation with no live renderer.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/title1.html"));
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  RenderFrameHost* initial_rfh =
      static_cast<WebContentsImpl*>(shell()->web_contents())
          ->GetFrameTree()->root()->current_frame_host();

  // Perform a same site navigation.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/title2.html"));
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  // The RenderFrameHost should not have changed.
  EXPECT_EQ(initial_rfh, static_cast<WebContentsImpl*>(shell()->web_contents())
                             ->GetFrameTree()->root()->current_frame_host());

  // Perform a cross-site navigation.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url = embedded_test_server()->GetURL("foo.com", "/title3.html");
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  // The RenderFrameHost should have changed.
  EXPECT_NE(initial_rfh, static_cast<WebContentsImpl*>(shell()->web_contents())
                             ->GetFrameTree()->root()->current_frame_host());
}

// Ensure that renderer initiated same-site navigations work with browser side
// navigation.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
                       RendererInitiatedSameSiteNavigation) {
  // Perform a navigation with no live renderer.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/simple_links.html"));
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  RenderFrameHost* initial_rfh =
      static_cast<WebContentsImpl*>(shell()->web_contents())
          ->GetFrameTree()->root()->current_frame_host();

  // Simulate clicking on a same-site link.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/title2.html"));
    bool success = false;
    EXPECT_TRUE(ExecuteScriptAndExtractBool(
        shell(), "window.domAutomationController.send(clickSameSiteLink());",
        &success));
    EXPECT_TRUE(success);
    EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  // The RenderFrameHost should not have changed.
  EXPECT_EQ(initial_rfh, static_cast<WebContentsImpl*>(shell()->web_contents())
                             ->GetFrameTree()->root()->current_frame_host());
}

// Ensure that renderer initiated cross-site navigations work with browser side
// navigation.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
                       RendererInitiatedCrossSiteNavigation) {
  // Perform a navigation with no live renderer.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/simple_links.html"));
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  RenderFrameHost* initial_rfh =
      static_cast<WebContentsImpl*>(shell()->web_contents())
          ->GetFrameTree()->root()->current_frame_host();

  // Simulate clicking on a cross-site link.
  {
    TestNavigationObserver observer(shell()->web_contents());
    const char kReplacePortNumber[] =
      "window.domAutomationController.send(setPortNumber(%d));";
    uint16_t port_number = embedded_test_server()->port();
    GURL url = embedded_test_server()->GetURL("foo.com", "/title2.html");
    bool success = false;
    EXPECT_TRUE(ExecuteScriptAndExtractBool(
        shell(), base::StringPrintf(kReplacePortNumber, port_number),
        &success));
    success = false;
    EXPECT_TRUE(ExecuteScriptAndExtractBool(
        shell(), "window.domAutomationController.send(clickCrossSiteLink());",
        &success));
    EXPECT_TRUE(success);
    EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  // The RenderFrameHost should not have changed unless site-per-process is
  // enabled.
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_NE(initial_rfh,
              static_cast<WebContentsImpl*>(shell()->web_contents())
                  ->GetFrameTree()
                  ->root()
                  ->current_frame_host());
  } else {
    EXPECT_EQ(initial_rfh,
              static_cast<WebContentsImpl*>(shell()->web_contents())
                  ->GetFrameTree()
                  ->root()
                  ->current_frame_host());
  }
}

// Ensure that browser side navigation handles navigation failures.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest, FailedNavigation) {
  // Perform a navigation with no live renderer.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL url(embedded_test_server()->GetURL("/title1.html"));
    NavigateToURL(shell(), url);
    EXPECT_EQ(url, observer.last_navigation_url());
    EXPECT_TRUE(observer.last_navigation_succeeded());
  }

  // Now navigate to an unreachable url.
  {
    TestNavigationObserver observer(shell()->web_contents());
    GURL error_url(
        net::URLRequestFailedJob::GetMockHttpUrl(net::ERR_CONNECTION_RESET));
    BrowserThread::PostTask(
        BrowserThread::IO, FROM_HERE,
        base::Bind(&net::URLRequestFailedJob::AddUrlHandler));
    NavigateToURL(shell(), error_url);
    EXPECT_EQ(error_url, observer.last_navigation_url());
    NavigationEntry* entry =
        shell()->web_contents()->GetController().GetLastCommittedEntry();
    EXPECT_EQ(PAGE_TYPE_ERROR, entry->GetPageType());
  }
}

// Ensure that browser side navigation handles POST navigations correctly.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest, POSTNavigation) {
  GURL url(embedded_test_server()->GetURL("/session_history/form.html"));
  GURL post_url = embedded_test_server()->GetURL("/echotitle");

  // Navigate to a page with a form.
  TestNavigationObserver observer(shell()->web_contents());
  NavigateToURL(shell(), url);
  EXPECT_EQ(url, observer.last_navigation_url());
  EXPECT_TRUE(observer.last_navigation_succeeded());

  // Submit the form.
  GURL submit_url("javascript:submitForm('isubmit')");
  NavigateToURL(shell(), submit_url);

  // Check that a proper POST navigation was done.
  EXPECT_EQ("text=&select=a",
            base::UTF16ToASCII(shell()->web_contents()->GetTitle()));
  EXPECT_EQ(post_url, shell()->web_contents()->GetLastCommittedURL());
  EXPECT_TRUE(shell()
                  ->web_contents()
                  ->GetController()
                  .GetActiveEntry()
                  ->GetHasPostData());
}

// Ensure that browser side navigation can load browser initiated navigations
// to view-source URLs.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
                       ViewSourceNavigation_BrowserInitiated) {
  TestNavigationObserver observer(shell()->web_contents());
  GURL url(embedded_test_server()->GetURL("/title1.html"));
  GURL view_source_url(content::kViewSourceScheme + std::string(":") +
                       url.spec());
  NavigateToURL(shell(), view_source_url);
  EXPECT_EQ(url, observer.last_navigation_url());
  EXPECT_TRUE(observer.last_navigation_succeeded());
}

// Ensure that browser side navigation blocks content initiated navigations to
// view-source URLs.
IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
                       ViewSourceNavigation_RendererInitiated) {
  TestNavigationObserver observer(shell()->web_contents());
  GURL kUrl(embedded_test_server()->GetURL("/simple_links.html"));
  NavigateToURL(shell(), kUrl);
  EXPECT_EQ(kUrl, observer.last_navigation_url());
  EXPECT_TRUE(observer.last_navigation_succeeded());

  std::unique_ptr<ConsoleObserverDelegate> console_delegate(
      new ConsoleObserverDelegate(
          shell()->web_contents(),
          "Not allowed to load local resource: view-source:about:blank"));
  shell()->web_contents()->SetDelegate(console_delegate.get());

  bool success = false;
  EXPECT_TRUE(ExecuteScriptAndExtractBool(
      shell()->web_contents(),
      "window.domAutomationController.send(clickViewSourceLink());", &success));
  EXPECT_TRUE(success);
  console_delegate->Wait();
  // Original page shouldn't navigate away.
  EXPECT_EQ(kUrl, shell()->web_contents()->GetURL());
  EXPECT_FALSE(shell()
                   ->web_contents()
                   ->GetController()
                   .GetLastCommittedEntry()
                   ->IsViewSourceMode());
}

}  // namespace content