[Mac] Add a perf test that counts the number of Mach ports in the browser.

chrome/test/perf/mach_ports_test.cc

Index: chrome/test/perf/mach_ports_test.cc
diff --git a/chrome/test/perf/mach_ports_test.cc b/chrome/test/perf/mach_ports_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d634450ee608f15116422f25836b2cb5100de65d
--- /dev/null
+++ b/chrome/test/perf/mach_ports_test.cc
@@ -0,0 +1,105 @@
+// 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 <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/string_util.h"
+#include "chrome/common/automation_constants.h"
+#include "chrome/common/automation_messages.h"
+#include "chrome/test/automation/automation_proxy.h"
+#include "chrome/test/automation/browser_proxy.h"
+#include "chrome/test/automation/tab_proxy.h"
+#include "chrome/test/automation/window_proxy.h"
+#include "chrome/test/perf/perf_test.h"
+#include "chrome/test/ui/ui_perf_test.h"
+#include "net/test/test_server.h"
+
+namespace {
+
+// This test spawns a new browser and counts the number of open Mach ports in
+// the browser process. It navigates tabs and closes them, repeatedly measuring
+// the number of open ports. This is used to protect against leaking Mach ports,
+// which was the source of <http://crbug.com/105513>.
+class MachPortsTest : public UIPerfTest {
+ public:
+  MachPortsTest()
+      : server_(net::TestServer::TYPE_HTTP,
+                FilePath(FILE_PATH_LITERAL("data/mach_ports/moz"))) {
+  }
+
+  virtual void SetUp() OVERRIDE {
+    UIPerfTest::SetUp();
+
+    ASSERT_TRUE(server_.Start());
+  }
+
+  virtual void TearDown() OVERRIDE {
+    std::string ports;
+    for (std::vector<int>::iterator it = port_counts_.begin();
+         it != port_counts_.end(); ++it) {
+      base::StringAppendF(&ports, "%d,", *it);
+    }
+    perf_test::PrintResultList("mach_ports", "", "", ports, "ports", true);
+
+    UIPerfTest::TearDown();
+  }
+
+  // Gets the browser's current number of Mach ports and records it.
+  void RecordPortCount() {
+    int port_count = 0;
+    ASSERT_TRUE(automation()->Send(
+        new AutomationMsg_GetMachPortCount(&port_count)));
+    port_counts_.push_back(port_count);
+  }
+
+  // Adds a tab from the page cycler data at the specified domain.
+  bool AddTab(scoped_refptr<BrowserProxy> browser, const std::string& domain) {
+    GURL url = server_.GetURL("files/" + domain + "/").Resolve("?skip");
+    return browser->AppendTab(url);
+  }
+
+ private:
+  net::TestServer server_;
+  std::vector<int> port_counts_;
+};
+
+TEST_F(MachPortsTest, GetCounts) {
+  ASSERT_EQ(AUTOMATION_SUCCESS, automation()->WaitForAppLaunch());
+
+  // Record startup number.
+  RecordPortCount();
+
+  // Create a browser and open a few tabs.
+  scoped_refptr<WindowProxy> window(automation()->GetActiveWindow());
+  ASSERT_TRUE(window.get());
+
+  scoped_refptr<BrowserProxy> browser(automation()->FindTabbedBrowserWindow());
+  ASSERT_TRUE(browser.get());
+
+  EXPECT_TRUE(AddTab(browser, "www.google.com"));
+  RecordPortCount();
+
+  EXPECT_TRUE(AddTab(browser, "www.cnn.com"));
+  RecordPortCount();
+
+  EXPECT_TRUE(AddTab(browser, "www.nytimes.com"));
+  RecordPortCount();
+
+  int tab_count = 0;
+  ASSERT_TRUE(browser->GetTabCount(&tab_count));
+  EXPECT_EQ(4, tab_count);  // Also count about:blank.
+
+  // Close each tab, recording the number of ports after each. Do not close the
+  // last tab, which is about:blank because it will be closed by the proxy.
+  for (int i = 0; i < tab_count - 1; ++i) {
+    scoped_refptr<TabProxy> tab(browser->GetActiveTab());
+    ASSERT_TRUE(tab.get());
+
+    EXPECT_TRUE(tab->Close(true));
+    RecordPortCount();
+  }
+}
+
+}  // namespace