Update the table of RAM vs number of renderers...

chrome/browser/browser_uitest.cc

 // Copyright (c) 2006-2008 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/file_util.h"
 #include "base/string_util.h"
+#include "base/sys_info.h"
 #include "base/values.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/l10n_util.h"
 #include "chrome/common/pref_names.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/ui/ui_test.h"
 #include "net/base/net_util.h"
@@ skipping 61 matching lines @@
   file_util::AppendToPath(&test_file, L"title2.html");
 
   NavigateToURL(net::FilePathToFileURL(test_file));
   Sleep(sleep_timeout_ms());  // The browser lazily updates the title.
 
   const std::wstring test_title(L"Title Of Awesomeness");
   EXPECT_EQ(WindowCaptionFromPageTitle(test_title), GetWindowTitle());
   EXPECT_EQ(test_title, GetActiveTabTitle());
 }
 
+// Create 34 tabs and verify that a lot of processes have been created. The
+// exact number of processes depends on the amount of memory. Previously we
+// had a hard limit of 31 processes and this test is mainly directed at
+// verifying that we don't crash when we pass this limit.
+TEST_F(BrowserTest, ThirtyFourTabs) {
+  std::wstring test_file = test_data_directory_;
+  file_util::AppendToPath(&test_file, L"title2.html");
+  GURL url(net::FilePathToFileURL(test_file));
+  scoped_ptr<BrowserProxy> window(automation()->GetBrowserWindow(0));
+  // There is one initial tab.
+  for (int ix = 0; ix != 33; ++ix) {
+    EXPECT_TRUE(window->AppendTab(url));
+  }
+  int tab_count = 0;
+  EXPECT_TRUE(window->GetTabCount(&tab_count));
+  EXPECT_EQ(34, tab_count);
+  // Do not test the rest in single process mode.
+  if (in_process_renderer())
+    return;

[M-A Ruel, 2009/02/19 12:33:56]

nit: Why not EXPECT_EQ(process_count, 0); ?

+  // See browser\renderer_host\render_process_host.cc for the algorithm to
+  // decide how many processes to create.
+  int process_count = GetBrowserProcessCount();
+  if (base::SysInfo::AmountOfPhysicalMemoryMB() >= 2048) {
+    EXPECT_GE(process_count, 24);
+  } else {
+    EXPECT_LE(process_count, 22);
+  }
+}
+
 // The browser should quit quickly if it receives a WM_ENDSESSION message.
 TEST_F(BrowserTest, WindowsSessionEnd) {
   std::wstring test_file = test_data_directory_;
   file_util::AppendToPath(&test_file, L"title1.html");
 
   NavigateToURL(net::FilePathToFileURL(test_file));
   Sleep(action_timeout_ms());
 
   // Simulate an end of session. Normally this happens when the user
   // shuts down the pc or logs off.
@@ skipping 148 matching lines @@
     if (title == L"PASSED") {
       // Success, bail out.
       break;
     }
   }
 
   if (i == 10)
     FAIL() << "failed to get error page title";
 }