Implement LoadLog, and hook up HostResolverImpl to LoadLog.

The functionality in load_log_util.h is currently unused, but since it motivates the implementation of LoadLog, figured it should be included with this review.

Note that I decided against defining the loggable event types as LoadStates, since I wanted more flexibility in adding crazy stuff, and they really seem too implementation specific to be in LoadStates.

BUG=http://crbug.com/14478
TEST=net_unittests
Review URL: http://codereview.chromium.org/165404

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23412 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 57 insertions, 0 deletions

diff --git a/net/base/load_log_util_unittest.cc b/net/base/load_log_util_unittest.cc
new file mode 100644
index 0000000..fbaa77b
--- /dev/null
+++ b/net/base/load_log_util_unittest.cc
@@ -0,0 +1,57 @@
+// Copyright (c) 2009 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 "net/base/load_log_unittest.h"
+#include "net/base/load_log_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace {
+
+TEST(LoadLogUtilTest, Basic) {
+  scoped_refptr<LoadLog> log(new LoadLog);
+
+  log->Add(MakeTime(1), LoadLog::TYPE_HOST_RESOLVER_IMPL, LoadLog::PHASE_BEGIN);
+  log->Add(MakeTime(5), LoadLog::TYPE_HOST_RESOLVER_IMPL_OBSERVER_ONSTART,
+      LoadLog::PHASE_BEGIN);
+  log->Add(MakeTime(8), LoadLog::TYPE_HOST_RESOLVER_IMPL_OBSERVER_ONSTART,
+      LoadLog::PHASE_END);
+  log->Add(MakeTime(12), LoadLog::TYPE_CANCELLED, LoadLog::PHASE_NONE);
+  log->Add(MakeTime(131), LoadLog::TYPE_HOST_RESOLVER_IMPL, LoadLog::PHASE_END);
+
+  EXPECT_EQ(
+    "t=  1: +HOST_RESOLVER_IMPL                    [dt=130]\n"
+    "t=  5:   +HOST_RESOLVER_IMPL_OBSERVER_ONSTART [dt=  3]\n"
+    "t=  8:   -HOST_RESOLVER_IMPL_OBSERVER_ONSTART\n"
+    "t= 12:    CANCELLED\n"
+    "t=131: -HOST_RESOLVER_IMPL",
+    LoadLogUtil::PrettyPrintAsEventTree(log));
+}
+
+TEST(LoadLogUtilTest, UnmatchedOpen) {
+  scoped_refptr<LoadLog> log(new LoadLog);
+
+  log->Add(MakeTime(3), LoadLog::TYPE_HOST_RESOLVER_IMPL, LoadLog::PHASE_BEGIN);
+  // Note that there is no matching call to PHASE_END for all of the following.
+  log->Add(MakeTime(6), LoadLog::TYPE_HOST_RESOLVER_IMPL_OBSERVER_ONSTART,
+      LoadLog::PHASE_BEGIN);
+  log->Add(MakeTime(7), LoadLog::TYPE_HOST_RESOLVER_IMPL_OBSERVER_ONSTART,
+      LoadLog::PHASE_BEGIN);
+  log->Add(MakeTime(8), LoadLog::TYPE_HOST_RESOLVER_IMPL_OBSERVER_ONSTART,
+      LoadLog::PHASE_BEGIN);
+  log->Add(MakeTime(10), LoadLog::TYPE_CANCELLED, LoadLog::PHASE_NONE);
+  log->Add(MakeTime(16), LoadLog::TYPE_HOST_RESOLVER_IMPL, LoadLog::PHASE_END);
+
+  EXPECT_EQ(
+    "t= 3: +HOST_RESOLVER_IMPL                          [dt=13]\n"
+    "t= 6:   +HOST_RESOLVER_IMPL_OBSERVER_ONSTART       [dt=10]\n"
+    "t= 7:     +HOST_RESOLVER_IMPL_OBSERVER_ONSTART     [dt= 9]\n"
+    "t= 8:       +HOST_RESOLVER_IMPL_OBSERVER_ONSTART   [dt= 8]\n"
+    "t=10:          CANCELLED\n"
+    "t=16: -HOST_RESOLVER_IMPL",
+    LoadLogUtil::PrettyPrintAsEventTree(log));
+}
+
+}  // namespace
+}  // namespace net