Implement declarativeContent API.

chrome/browser/extensions/api/declarative_content/declarative_content_apitest.cc

+// 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 "chrome/browser/extensions/extension_action.h"
+#include "chrome/browser/extensions/extension_action_manager.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/browser/extensions/extension_tab_util.h"
+#include "chrome/browser/extensions/extension_test_message_listener.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/extensions/features/feature.h"
+#include "content/public/test/browser_test_utils.h"
+
+namespace extensions {
+namespace {
+
+class DeclarativeContentApiTest : public ExtensionApiTest {
+ public:
+  DeclarativeContentApiTest()
+      // Set the channel to "trunk" since declarativeContent is restricted
+      // to trunk.
+      : current_channel_(chrome::VersionInfo::CHANNEL_UNKNOWN) {
+  }
+  virtual ~DeclarativeContentApiTest() {}
+
+  extensions::Feature::ScopedCurrentChannel current_channel_;
+};
+
+IN_PROC_BROWSER_TEST_F(DeclarativeContentApiTest, Overview) {
+  ExtensionTestMessageListener ready("ready", true);
+  const Extension* extension =
+      LoadExtension(test_data_dir_.AppendASCII("declarative_content/overview"));
+  ASSERT_TRUE(extension);
+  const ExtensionAction* page_action =
+      ExtensionActionManager::Get(browser()->profile())->
+      GetPageAction(*extension);
+  ASSERT_TRUE(page_action);
+
+  ASSERT_TRUE(ready.WaitUntilSatisfied());
+  content::WebContents* const tab =
+      browser()->tab_strip_model()->GetWebContentsAt(0);
+  const int tab_id = ExtensionTabUtil::GetTabId(tab);
+
+  NavigateInRenderer(tab, GURL("http://test1/"));

[battre, 2013/01/18 10:37:29]

Are you sure that this is not racy?

[Jeffrey Yasskin, 2013/01/22 08:01:22]

I'm never certain. What race are you thinking of? The
ExtensionTestMessageListener |ready| is supposed to handle waiting for the rules
to be registered. I'm assuming that NavigateInRenderer waits until the renderer
is done navigating and sending messages, but I haven't investigated it in
detail.

+
+  // The declarative API should show the page action instantly, rather
+  // than waiting for the extension to run.
+  EXPECT_TRUE(page_action->GetIsVisible(tab_id));
+
+  // Make sure leaving a matching page unshows the page action.
+  NavigateInRenderer(tab, GURL("http://not_checked/"));
+  EXPECT_FALSE(page_action->GetIsVisible(tab_id));
+
+  // Insert a password field to make sure that's noticed.
+  ASSERT_TRUE(content::ExecuteScript(
+      tab, "document.body.innerHTML = '<input type=\"password\">';"));
+  // Give the mutation observer a chance to run and send back the
+  // matching-selector update.
+  ASSERT_TRUE(content::ExecuteScript(tab, ""));
+  EXPECT_TRUE(page_action->GetIsVisible(tab_id));
+
+  // Remove it again to make sure that reverts the action.
+  ASSERT_TRUE(content::ExecuteScript(
+      tab, "document.body.innerHTML = 'Hello world';"));
+  // Give the mutation observer a chance to run and send back the
+  // matching-selector update.
+  ASSERT_TRUE(content::ExecuteScript(tab, ""));
+  EXPECT_FALSE(page_action->GetIsVisible(tab_id));
+}
+
+}  // namespace
+}  // namespace extensions