Plugin Power Saver: Add comprehensive browser tests.

chrome/browser/plugins/plugin_power_saver_browsertest.cc

+// Copyright 2015 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/command_line.h"
+#include "base/strings/stringprintf.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/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/public/test/ppapi_test_utils.h"

[Lei Zhang, 2015/04/21 01:28:14]

not needed?

[tommycli, 2015/04/22 18:17:46]

Needed for Line 25.

+#include "content/public/test/test_utils.h"

[Lei Zhang, 2015/04/21 01:28:14]

ditto

[tommycli, 2015/04/22 18:17:46]

Done.

+#include "ppapi/shared_impl/ppapi_switches.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+#include "ui/gfx/geometry/point.h"
+
+class PluginPowerSaverBrowserTest : virtual public InProcessBrowserTest {
+ public:
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    command_line->AppendSwitch(switches::kEnablePluginPowerSaver);
+    command_line->AppendSwitch(switches::kEnablePepperTesting);
+
+    ASSERT_TRUE(ppapi::RegisterPowerSaverTestPlugin(command_line));
+  }
+
+ protected:
+  void LoadHTML(const char* html) {
+    std::string url_str = "data:text/html;charset=utf-8,";
+    url_str.append(html);
+    ui_test_utils::NavigateToURL(browser(), GURL(url_str));
+    EXPECT_TRUE(content::WaitForRenderFrameReady(
+        GetActiveWebContents()->GetMainFrame()));
+  }
+
+  content::WebContents* GetActiveWebContents() {
+    return browser()->tab_strip_model()->GetActiveWebContents();
+  }
+
+  bool IsPluginPeripheral(const char* element_id) {
+    std::string script = base::StringPrintf(
+        "var plugin = window.document.getElementById('%s');"

[Lei Zhang, 2015/04/21 01:28:14]

You may want to also check that |plugin| is actually a plugin, and not some
other tag.

[tommycli, 2015/04/22 18:17:46]

Done.

+        "function handleEvent() {"
+        "  if (event.data.isPeripheral != undefined) {"
+        "    window.domAutomationController.send(event.data.isPeripheral);"
+        "    plugin.removeEventListener('message', handleEvent);"
+        "  }"
+        "}"
+        "if (plugin.postMessage == undefined) {"
+        "  window.domAutomationController.send(true);"
+        "} else {"
+        "  plugin.addEventListener('message', handleEvent);"
+        "  plugin.postMessage('isPeripheral');"
+        "}",
+        element_id);
+
+    bool result = false;
+    EXPECT_TRUE(content::ExecuteScriptAndExtractBool(GetActiveWebContents(),
+                                                     script, &result));
+    return result;
+  }
+
+  // This sends a simulated click at |point| and waits (by polling) for the
+  // plugin to be marked essential and run. Simply cycling the message loops
+  // does not work, as the renderer process must mark the plugin essential.
+  void SimulateClickAndAwaitMarkedEssential(const char* element_id,
+                                            const gfx::Point& point) {
+    content::SimulateMouseClickAt(GetActiveWebContents(), 0 /* modifiers */,
+                                  blink::WebMouseEvent::ButtonLeft, point);
+
+    std::string script = base::StringPrintf(
+        "function checkEssential() {"
+        "  var plugin = window.document.getElementById('%s');"
+        "  if (plugin.postMessage == undefined) {"
+        "    /* Placeholder still up. Try again in 50ms. */"
+        "    setTimeout(checkEssential, 50);"

[Lei Zhang, 2015/04/21 01:28:14]

Can you add an onclick handler to the placeholder, and have it do something that
the browser can observe, like changing the page's title and observe that with a
TitleWatcher?

[tommycli, 2015/04/22 18:17:46]

Done. Moved to a different mechanism.

+        "  } else {"
+        "    function handleEvent() {"
+        "      if (event.data.isPeripheral != undefined) {"
+        "        if (event.data.isPeripheral) {"
+        "          plugin.postMessage('isPeripheral');"
+        "        } else {"
+        "          window.domAutomationController.send(true);"
+        "          plugin.removeEventListener('message', handleEvent);"
+        "        }"
+        "      }"
+        "    }"
+        "    plugin.addEventListener('message', handleEvent);"
+        "    plugin.postMessage('isPeripheral');"
+        "  }"
+        "}"
+        "checkEssential();",
+        element_id);
+
+    bool result = false;
+    EXPECT_TRUE(content::ExecuteScriptAndExtractBool(GetActiveWebContents(),
+                                                     script, &result));
+    EXPECT_TRUE(result);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, SmallSameOrigin) {
+  LoadHTML(
+      "<object id='plugin' data='fake.swf' "
+      "type='application/x-ppapi-tests' width='400' height='100'></object>");
+  EXPECT_FALSE(IsPluginPeripheral("plugin"));
+}
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, SmallCrossOrigin) {
+  LoadHTML(
+      "<object id='plugin' data='http://otherorigin.com/fake.swf' "
+      "type='application/x-ppapi-tests' width='400' height='100'></object>");
+  EXPECT_TRUE(IsPluginPeripheral("plugin"));
+
+  SimulateClickAndAwaitMarkedEssential("plugin", gfx::Point(50, 50));
+}
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, LargeCrossOrigin) {
+  LoadHTML(
+      "<object id='plugin' data='http://otherorigin.com/fake.swf' "
+      "type='application/x-ppapi-tests' width='400' height='500'></object>");
+  EXPECT_FALSE(IsPluginPeripheral("plugin"));
+}
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, LargePluginsUsePosters) {
+  LoadHTML(
+      "<object id='plugin' type='application/x-ppapi-tests' "
+      "    width='400' height='500'>"
+      "  <param name='poster' value='snapshot1x.png 1x, snapshot2x.png 2x' />"
+      "</object>");
+  EXPECT_TRUE(IsPluginPeripheral("plugin"));
+}
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, OriginWhitelisting) {
+  LoadHTML(
+      "<object id='plugin1' data='http://otherorigin.com/fake1.swf' "
+      "type='application/x-ppapi-tests' width='400' height='100'></object>"
+      "<object id='plugin2' data='http://otherorigin.com/fake2.swf' "
+      "type='application/x-ppapi-tests' width='400' height='500'></object>");
+  EXPECT_FALSE(IsPluginPeripheral("plugin1"));
+  EXPECT_FALSE(IsPluginPeripheral("plugin2"));
+}
+
+IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, LargeCrossOriginObscured) {
+  LoadHTML(
+      "<div style='width: 100px; height: 100px; overflow: hidden;'>"
+      "  <object id='plugin' data='http://otherorigin.com/fake.swf' "
+      "  type='application/x-ppapi-tests' width='400' height='500'></object>"
+      "</div>");
+  EXPECT_TRUE(IsPluginPeripheral("plugin"));
+}