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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 "net/dns/dns_config_service.h"
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/cancelable_callback.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/test/test_timeouts.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
class DnsConfigServiceTest : public testing::Test {
public:
void OnConfigChanged(const DnsConfig& config) {
EXPECT_FALSE(config.Equals(last_config_)) <<
"Config must be different from last call.";
last_config_ = config;
if (quit_on_config_)
MessageLoop::current()->Quit();
}
protected:
class TestDnsConfigService : public DnsConfigService {
public:
virtual void Watch(const CallbackType& callback) OVERRIDE {
set_callback(callback);
}
// Expose the protected methods to this test suite.
void InvalidateConfig() {
DnsConfigService::InvalidateConfig();
}
void InvalidateHosts() {
DnsConfigService::InvalidateHosts();
}
void OnConfigRead(const DnsConfig& config) {
DnsConfigService::OnConfigRead(config);
}
void OnHostsRead(const DnsHosts& hosts) {
DnsConfigService::OnHostsRead(hosts);
}
};
void WaitForConfig(base::TimeDelta timeout) {
base::CancelableClosure closure(MessageLoop::QuitClosure());
MessageLoop::current()->PostDelayedTask(FROM_HERE,
closure.callback(),
timeout);
quit_on_config_ = true;
MessageLoop::current()->Run();
quit_on_config_ = false;
closure.Cancel();
}
// Generate a config using the given seed..
DnsConfig MakeConfig(unsigned seed) {
DnsConfig config;
IPAddressNumber ip;
EXPECT_TRUE(ParseIPLiteralToNumber("1.2.3.4", &ip));
config.nameservers.push_back(IPEndPoint(ip, seed & 0xFFFF));
EXPECT_TRUE(config.IsValid());
return config;
}
// Generate hosts using the given seed.
DnsHosts MakeHosts(unsigned seed) {
DnsHosts hosts;
std::string hosts_content = "127.0.0.1 localhost";
hosts_content.append(seed, '1');
ParseHosts(hosts_content, &hosts);
EXPECT_FALSE(hosts.empty());
return hosts;
}
virtual void SetUp() OVERRIDE {
quit_on_config_ = false;
service_.reset(new TestDnsConfigService());
service_->Watch(base::Bind(&DnsConfigServiceTest::OnConfigChanged,
base::Unretained(this)));
EXPECT_FALSE(last_config_.IsValid());
}
DnsConfig last_config_;
bool quit_on_config_;
// Service under test.
scoped_ptr<TestDnsConfigService> service_;
};
} // namespace
TEST_F(DnsConfigServiceTest, FirstConfig) {
DnsConfig config = MakeConfig(1);
service_->OnConfigRead(config);
// No hosts yet, so no config.
EXPECT_FALSE(last_config_.IsValid());
service_->OnHostsRead(config.hosts);
// Empty hosts is acceptable.
EXPECT_TRUE(last_config_.IsValid());
EXPECT_TRUE(last_config_.Equals(config));
}
TEST_F(DnsConfigServiceTest, Timeout) {
DnsConfig config = MakeConfig(1);
config.hosts = MakeHosts(1);
service_->OnConfigRead(config);
service_->OnHostsRead(config.hosts);
EXPECT_TRUE(last_config_.IsValid());
EXPECT_TRUE(last_config_.Equals(config));
service_->InvalidateConfig();
WaitForConfig(TestTimeouts::action_timeout());
EXPECT_FALSE(last_config_.IsValid());
service_->OnConfigRead(config);
EXPECT_TRUE(last_config_.Equals(config));
service_->InvalidateHosts();
WaitForConfig(TestTimeouts::action_timeout());
EXPECT_FALSE(last_config_.IsValid());
service_->OnHostsRead(config.hosts);
EXPECT_TRUE(last_config_.Equals(config));
}
TEST_F(DnsConfigServiceTest, SameConfig) {
DnsConfig config = MakeConfig(1);
config.hosts = MakeHosts(1);
service_->OnConfigRead(config);
service_->OnHostsRead(config.hosts);
EXPECT_TRUE(last_config_.Equals(config));
// OnConfigChanged will catch if there was no change.
service_->OnConfigRead(config);
EXPECT_TRUE(last_config_.Equals(config));
service_->OnHostsRead(config.hosts);
EXPECT_TRUE(last_config_.Equals(config));
}
TEST_F(DnsConfigServiceTest, DifferentConfig) {
DnsConfig config1 = MakeConfig(1);
DnsConfig config2 = MakeConfig(2);
DnsConfig config3 = MakeConfig(1);
config1.hosts = MakeHosts(1);
config2.hosts = MakeHosts(1);
config3.hosts = MakeHosts(2);
ASSERT_TRUE(config1.EqualsIgnoreHosts(config3));
ASSERT_FALSE(config1.Equals(config2));
ASSERT_FALSE(config1.Equals(config3));
ASSERT_FALSE(config2.Equals(config3));
service_->OnConfigRead(config1);
service_->OnHostsRead(config1.hosts);
EXPECT_TRUE(last_config_.Equals(config1));
// It doesn't matter for this tests, but increases coverage.
service_->InvalidateConfig();
service_->InvalidateHosts();
service_->OnConfigRead(config2);
service_->OnHostsRead(config2.hosts);
EXPECT_TRUE(last_config_.Equals(config2));
service_->OnConfigRead(config3);
service_->OnHostsRead(config3.hosts);
EXPECT_TRUE(last_config_.Equals(config3));
}
#if defined(OS_POSIX) || defined(OS_WIN)
// TODO(szym): This is really an integration test and can time out if HOSTS is
// huge. http://crbug.com/107810
TEST_F(DnsConfigServiceTest, FLAKY_GetSystemConfig) {
service_.reset();
scoped_ptr<DnsConfigService> service(DnsConfigService::CreateSystemService());
service->Watch(base::Bind(&DnsConfigServiceTest::OnConfigChanged,
base::Unretained(this)));
base::TimeDelta kTimeout = TestTimeouts::action_max_timeout();
WaitForConfig(kTimeout);
ASSERT_TRUE(last_config_.IsValid()) << "Did not receive DnsConfig in " <<
kTimeout.InSecondsF() << "s";
// Restart watch to confirm it's allowed.
service->Watch(base::Bind(&DnsConfigServiceTest::OnConfigChanged,
base::Unretained(this)));
}
#endif // OS_POSIX || OS_WIN
} // namespace net
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