// Copyright (c) 2012 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 "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/extensions/api/permissions/permissions_api.h"
#include "chrome/browser/extensions/extension_apitest.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/test/base/ui_test_utils.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/browser_test_utils.h"
#include "extensions/browser/notification_types.h"
#include "extensions/common/extension.h"
#include "extensions/test/result_catcher.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "url/gurl.h"

namespace extensions {

namespace {

// A fake webstore domain.
const char kWebstoreDomain[] = "cws.com";

// Check whether or not style was injected, with |expected_injection| indicating
// the expected result. Also ensure that no CSS was added to the
// document.styleSheets array.
testing::AssertionResult CheckStyleInjection(Browser* browser,
                                             const GURL& url,
                                             bool expected_injection) {
  ui_test_utils::NavigateToURL(browser, url);

  bool css_injected = false;
  if (!content::ExecuteScriptAndExtractBool(
          browser->tab_strip_model()->GetActiveWebContents(),
          "window.domAutomationController.send("
          "    document.defaultView.getComputedStyle(document.body, null)."
          "        getPropertyValue('display') == 'none');",
          &css_injected)) {
    return testing::AssertionFailure()
        << "Failed to execute script and extract bool for injection status.";
  }

  if (css_injected != expected_injection) {
    std::string message;
    if (css_injected)
      message = "CSS injected when no injection was expected.";
    else
      message = "CSS not injected when injection was expected.";
    return testing::AssertionFailure() << message;
  }

  bool css_doesnt_add_to_list = false;
  if (!content::ExecuteScriptAndExtractBool(
          browser->tab_strip_model()->GetActiveWebContents(),
          "window.domAutomationController.send("
          "    document.styleSheets.length == 0);",
          &css_doesnt_add_to_list)) {
    return testing::AssertionFailure()
        << "Failed to execute script and extract bool for stylesheets length.";
  }
  if (!css_doesnt_add_to_list) {
    return testing::AssertionFailure()
        << "CSS injection added to number of stylesheets.";
  }

  return testing::AssertionSuccess();
}

}  // namespace

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptAllFrames) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/all_frames")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptAboutBlankIframes) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(
      RunExtensionTest("content_scripts/about_blank_iframes")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptAboutBlankAndSrcdoc) {
  // The optional "*://*/*" permission is requested after verifying that
  // content script insertion solely depends on content_scripts[*].matches.
  // The permission is needed for chrome.tabs.executeScript tests.
  PermissionsRequestFunction::SetAutoConfirmForTests(true);
  PermissionsRequestFunction::SetIgnoreUserGestureForTests(true);

  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/about_blank_srcdoc"))
      << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptExtensionIframe) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/extension_iframe")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptExtensionProcess) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(
      RunExtensionTest("content_scripts/extension_process")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptFragmentNavigation) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  const char extension_name[] = "content_scripts/fragment";
  ASSERT_TRUE(RunExtensionTest(extension_name)) << message_;
}

// Times out on Linux: http://crbug.com/163097
#if defined(OS_LINUX)
#define MAYBE_ContentScriptIsolatedWorlds DISABLED_ContentScriptIsolatedWorlds
#else
#define MAYBE_ContentScriptIsolatedWorlds ContentScriptIsolatedWorlds
#endif
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_ContentScriptIsolatedWorlds) {
  // This extension runs various bits of script and tests that they all run in
  // the same isolated world.
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/isolated_world1")) << message_;

  // Now load a different extension, inject into same page, verify worlds aren't
  // shared.
  ASSERT_TRUE(RunExtensionTest("content_scripts/isolated_world2")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptIgnoreHostPermissions) {
  host_resolver()->AddRule("a.com", "127.0.0.1");
  host_resolver()->AddRule("b.com", "127.0.0.1");
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest(
      "content_scripts/dont_match_host_permissions")) << message_;
}

// crbug.com/39249 -- content scripts js should not run on view source.
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptViewSource) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/view_source")) << message_;
}

// crbug.com/126257 -- content scripts should not get injected into other
// extensions.
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptOtherExtensions) {
  host_resolver()->AddRule("a.com", "127.0.0.1");
  ASSERT_TRUE(StartEmbeddedTestServer());
  // First, load extension that sets up content script.
  ASSERT_TRUE(RunExtensionTest("content_scripts/other_extensions/injector"))
      << message_;
  // Then load targeted extension to make sure its content isn't changed.
  ASSERT_TRUE(RunExtensionTest("content_scripts/other_extensions/victim"))
      << message_;
}

class ContentScriptCssInjectionTest : public ExtensionApiTest {
 protected:
  // TODO(rdevlin.cronin): Make a testing switch that looks like FeatureSwitch,
  // but takes in an optional value so that we don't have to do this.
  void SetUpCommandLine(base::CommandLine* command_line) override {
    ExtensionApiTest::SetUpCommandLine(command_line);
    // We change the Webstore URL to be http://cws.com. We need to do this so
    // we can check that css injection is not allowed on the webstore (which
    // could lead to spoofing). Unfortunately, host_resolver seems to have
    // problems with redirecting "chrome.google.com" to the test server, so we
    // can't use the real Webstore's URL. If this changes, we could clean this
    // up.
    command_line->AppendSwitchASCII(
        switches::kAppsGalleryURL,
        base::StringPrintf("http://%s", kWebstoreDomain));
  }
};

IN_PROC_BROWSER_TEST_F(ContentScriptCssInjectionTest,
                       ContentScriptInjectsStyles) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  host_resolver()->AddRule(kWebstoreDomain, "127.0.0.1");

  ASSERT_TRUE(LoadExtension(test_data_dir_.AppendASCII("content_scripts")
                                          .AppendASCII("css_injection")));

  // CSS injection should be allowed on an aribitrary web page.
  GURL url =
      embedded_test_server()->GetURL("/extensions/test_file_with_body.html");
  EXPECT_TRUE(CheckStyleInjection(browser(), url, true));

  // The loaded extension has an exclude match for "extensions/test_file.html",
  // so no CSS should be injected.
  url = embedded_test_server()->GetURL("/extensions/test_file.html");
  EXPECT_TRUE(CheckStyleInjection(browser(), url, false));

  // We disallow all injection on the webstore.
  GURL::Replacements replacements;
  std::string host(kWebstoreDomain);
  replacements.SetHostStr(host);
  url = embedded_test_server()->GetURL("/extensions/test_file_with_body.html")
            .ReplaceComponents(replacements);
  EXPECT_TRUE(CheckStyleInjection(browser(), url, false));
}

// crbug.com/120762
IN_PROC_BROWSER_TEST_F(
    ExtensionApiTest,
    DISABLED_ContentScriptStylesInjectedIntoExistingRenderers) {
  ASSERT_TRUE(StartEmbeddedTestServer());

  content::WindowedNotificationObserver signal(
      extensions::NOTIFICATION_USER_SCRIPTS_UPDATED,
      content::Source<Profile>(browser()->profile()));

  // Start with a renderer already open at a URL.
  GURL url(test_server()->GetURL("file/extensions/test_file.html"));
  ui_test_utils::NavigateToURL(browser(), url);

  LoadExtension(
      test_data_dir_.AppendASCII("content_scripts/existing_renderers"));

  signal.Wait();

  // And check that its styles were affected by the styles that just got loaded.
  bool styles_injected;
  ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
      browser()->tab_strip_model()->GetActiveWebContents(),
      "window.domAutomationController.send("
      "    document.defaultView.getComputedStyle(document.body, null)."
      "        getPropertyValue('background-color') == 'rgb(255, 0, 0)')",
      &styles_injected));
  ASSERT_TRUE(styles_injected);
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest,
                       ContentScriptCSSLocalization) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/css_l10n")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptExtensionAPIs) {
  ASSERT_TRUE(StartEmbeddedTestServer());

  const extensions::Extension* extension = LoadExtension(
      test_data_dir_.AppendASCII("content_scripts/extension_api"));

  ResultCatcher catcher;
  ui_test_utils::NavigateToURL(
      browser(),
      embedded_test_server()->GetURL(
          "/extensions/api_test/content_scripts/extension_api/functions.html"));
  EXPECT_TRUE(catcher.GetNextResult());

  // Navigate to a page that will cause a content script to run that starts
  // listening for an extension event.
  ui_test_utils::NavigateToURL(
      browser(),
      embedded_test_server()->GetURL(
          "/extensions/api_test/content_scripts/extension_api/events.html"));

  // Navigate to an extension page that will fire the event events.js is
  // listening for.
  ui_test_utils::NavigateToURLWithDisposition(
      browser(), extension->GetResourceURL("fire_event.html"),
      NEW_FOREGROUND_TAB, ui_test_utils::BROWSER_TEST_NONE);
  EXPECT_TRUE(catcher.GetNextResult());
}

// Flaky on Windows. http://crbug.com/248418
#if defined(OS_WIN)
#define MAYBE_ContentScriptPermissionsApi DISABLED_ContentScriptPermissionsApi
#else
#define MAYBE_ContentScriptPermissionsApi ContentScriptPermissionsApi
#endif
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_ContentScriptPermissionsApi) {
  extensions::PermissionsRequestFunction::SetIgnoreUserGestureForTests(true);
  extensions::PermissionsRequestFunction::SetAutoConfirmForTests(true);
  host_resolver()->AddRule("*.com", "127.0.0.1");
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/permissions")) << message_;
}

IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptBypassPageCSP) {
  ASSERT_TRUE(StartEmbeddedTestServer());
  ASSERT_TRUE(RunExtensionTest("content_scripts/bypass_page_csp")) << message_;
}

}  // namespace extensions