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// 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/net/chrome_net_log.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/simple_thread.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const int kThreads = 10;
const int kEvents = 100;
class CountingObserver : public net::NetLog::ThreadSafeObserver {
public:
CountingObserver() : count_(0) {}
~CountingObserver() {
if (net_log())
net_log()->RemoveThreadSafeObserver(this);
}
virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE {
++count_;
}
int count() const { return count_; }
private:
int count_;
};
void AddEvent(ChromeNetLog* net_log) {
net_log->AddGlobalEntry(net::NetLog::TYPE_CANCELLED);
}
// A thread that waits until an event has been signalled before calling
// RunTestThread.
class ChromeNetLogTestThread : public base::SimpleThread {
public:
ChromeNetLogTestThread() : base::SimpleThread("ChromeNetLogTest"),
net_log_(NULL),
start_event_(NULL) {
}
// We'll wait for |start_event| to be triggered before calling a subclass's
// subclass's RunTestThread() function.
void Init(ChromeNetLog* net_log, base::WaitableEvent* start_event) {
start_event_ = start_event;
net_log_ = net_log;
}
virtual void Run() OVERRIDE {
start_event_->Wait();
RunTestThread();
}
// Subclasses must override this with the code they want to run on their
// thread.
virtual void RunTestThread() = 0;
protected:
ChromeNetLog* net_log_;
private:
// Only triggered once all threads have been created, to make it less likely
// each thread completes before the next one starts.
base::WaitableEvent* start_event_;
DISALLOW_COPY_AND_ASSIGN(ChromeNetLogTestThread);
};
// A thread that adds a bunch of events to the NetLog.
class AddEventsTestThread : public ChromeNetLogTestThread {
public:
AddEventsTestThread() {}
~AddEventsTestThread() {}
private:
virtual void RunTestThread() OVERRIDE {
for (int i = 0; i < kEvents; ++i)
AddEvent(net_log_);
}
DISALLOW_COPY_AND_ASSIGN(AddEventsTestThread);
};
// A thread that adds and removes an observer from the NetLog repeatedly.
class AddRemoveObserverTestThread : public ChromeNetLogTestThread {
public:
AddRemoveObserverTestThread() {}
~AddRemoveObserverTestThread() {
EXPECT_TRUE(!observer_.net_log());
}
private:
virtual void RunTestThread() OVERRIDE {
for (int i = 0; i < kEvents; ++i) {
ASSERT_FALSE(observer_.net_log());
net_log_->AddThreadSafeObserver(&observer_, net::NetLog::LOG_BASIC);
ASSERT_EQ(net_log_, observer_.net_log());
ASSERT_EQ(net::NetLog::LOG_BASIC, observer_.log_level());
net_log_->SetObserverLogLevel(&observer_, net::NetLog::LOG_ALL_BUT_BYTES);
ASSERT_EQ(net_log_, observer_.net_log());
ASSERT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, observer_.log_level());
ASSERT_LE(net_log_->GetLogLevel(), net::NetLog::LOG_ALL_BUT_BYTES);
net_log_->SetObserverLogLevel(&observer_, net::NetLog::LOG_ALL);
ASSERT_EQ(net_log_, observer_.net_log());
ASSERT_EQ(net::NetLog::LOG_ALL, observer_.log_level());
ASSERT_LE(net_log_->GetLogLevel(), net::NetLog::LOG_ALL);
net_log_->RemoveThreadSafeObserver(&observer_);
ASSERT_TRUE(!observer_.net_log());
}
}
CountingObserver observer_;
DISALLOW_COPY_AND_ASSIGN(AddRemoveObserverTestThread);
};
// Creates |kThreads| threads of type |ThreadType| and then runs them all
// to completion.
template<class ThreadType>
void RunTestThreads(ChromeNetLog* net_log) {
ThreadType threads[kThreads];
base::WaitableEvent start_event(true, false);
for (size_t i = 0; i < arraysize(threads); ++i) {
threads[i].Init(net_log, &start_event);
threads[i].Start();
}
start_event.Signal();
for (size_t i = 0; i < arraysize(threads); ++i)
threads[i].Join();
}
// Makes sure that events on multiple threads are dispatched to all observers.
TEST(ChromeNetLogTest, NetLogEventThreads) {
ChromeNetLog net_log;
// Attach some observers. Since they're created after |net_log|, they'll
// safely detach themselves on destruction.
CountingObserver observers[3];
for (size_t i = 0; i < arraysize(observers); ++i)
net_log.AddThreadSafeObserver(&observers[i], net::NetLog::LOG_BASIC);
// Run a bunch of threads to completion, each of which will emit events to
// |net_log|.
RunTestThreads<AddEventsTestThread>(&net_log);
// Check that each observer saw the emitted events.
const int kTotalEvents = kThreads * kEvents;
for (size_t i = 0; i < arraysize(observers); ++i)
EXPECT_EQ(kTotalEvents, observers[i].count());
}
// Test adding and removing a single observer.
TEST(ChromeNetLogTest, NetLogAddRemoveObserver) {
ChromeNetLog net_log;
CountingObserver observer;
AddEvent(&net_log);
EXPECT_EQ(0, observer.count());
EXPECT_EQ(NULL, observer.net_log());
EXPECT_EQ(net::NetLog::LOG_BASIC, net_log.GetLogLevel());
// Add the observer and add an event.
net_log.AddThreadSafeObserver(&observer, net::NetLog::LOG_BASIC);
EXPECT_EQ(&net_log, observer.net_log());
EXPECT_EQ(net::NetLog::LOG_BASIC, observer.log_level());
EXPECT_EQ(net::NetLog::LOG_BASIC, net_log.GetLogLevel());
AddEvent(&net_log);
EXPECT_EQ(1, observer.count());
// Change the observer's logging level and add an event.
net_log.SetObserverLogLevel(&observer, net::NetLog::LOG_ALL);
EXPECT_EQ(&net_log, observer.net_log());
EXPECT_EQ(net::NetLog::LOG_ALL, observer.log_level());
EXPECT_EQ(net::NetLog::LOG_ALL, net_log.GetLogLevel());
AddEvent(&net_log);
EXPECT_EQ(2, observer.count());
// Remove observer and add an event.
net_log.RemoveThreadSafeObserver(&observer);
EXPECT_EQ(NULL, observer.net_log());
EXPECT_EQ(net::NetLog::LOG_BASIC, net_log.GetLogLevel());
AddEvent(&net_log);
EXPECT_EQ(2, observer.count());
// Add the observer a final time, and add an event.
net_log.AddThreadSafeObserver(&observer, net::NetLog::LOG_ALL);
EXPECT_EQ(&net_log, observer.net_log());
EXPECT_EQ(net::NetLog::LOG_ALL, observer.log_level());
EXPECT_EQ(net::NetLog::LOG_ALL, net_log.GetLogLevel());
AddEvent(&net_log);
EXPECT_EQ(3, observer.count());
}
// Test adding and removing two observers.
TEST(ChromeNetLogTest, NetLogTwoObservers) {
ChromeNetLog net_log;
CountingObserver observer[2];
// Add first observer.
net_log.AddThreadSafeObserver(&observer[0], net::NetLog::LOG_ALL_BUT_BYTES);
EXPECT_EQ(&net_log, observer[0].net_log());
EXPECT_EQ(NULL, observer[1].net_log());
EXPECT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, observer[0].log_level());
EXPECT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, net_log.GetLogLevel());
// Add second observer observer.
net_log.AddThreadSafeObserver(&observer[1], net::NetLog::LOG_ALL);
EXPECT_EQ(&net_log, observer[0].net_log());
EXPECT_EQ(&net_log, observer[1].net_log());
EXPECT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, observer[0].log_level());
EXPECT_EQ(net::NetLog::LOG_ALL, observer[1].log_level());
EXPECT_EQ(net::NetLog::LOG_ALL, net_log.GetLogLevel());
// Add event and make sure both observers receive it.
AddEvent(&net_log);
EXPECT_EQ(1, observer[0].count());
EXPECT_EQ(1, observer[1].count());
// Remove second observer.
net_log.RemoveThreadSafeObserver(&observer[1]);
EXPECT_EQ(&net_log, observer[0].net_log());
EXPECT_EQ(NULL, observer[1].net_log());
EXPECT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, observer[0].log_level());
EXPECT_EQ(net::NetLog::LOG_ALL_BUT_BYTES, net_log.GetLogLevel());
// Add event and make sure only second observer gets it.
AddEvent(&net_log);
EXPECT_EQ(2, observer[0].count());
EXPECT_EQ(1, observer[1].count());
// Remove first observer.
net_log.RemoveThreadSafeObserver(&observer[0]);
EXPECT_EQ(NULL, observer[0].net_log());
EXPECT_EQ(NULL, observer[1].net_log());
EXPECT_EQ(net::NetLog::LOG_BASIC, net_log.GetLogLevel());
// Add event and make sure neither observer gets it.
AddEvent(&net_log);
EXPECT_EQ(2, observer[0].count());
EXPECT_EQ(1, observer[1].count());
}
// Makes sure that adding and removing observers simultaneously on different
// threads works.
TEST(ChromeNetLogTest, NetLogAddRemoveObserverThreads) {
ChromeNetLog net_log;
// Run a bunch of threads to completion, each of which will repeatedly add
// and remove an observer, and set its logging level.
RunTestThreads<AddRemoveObserverTestThread>(&net_log);
}
} // namespace
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