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Copy pathproxy_resolver_v8_tracing_unittest.cc
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proxy_resolver_v8_tracing_unittest.cc
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// Copyright (c) 2013 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/proxy_resolution/proxy_resolver_v8_tracing.h"
#include <string>
#include <utility>
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/platform_thread.h"
#include "base/threading/thread_checker.h"
#include "base/values.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/host_cache.h"
#include "net/dns/mock_host_resolver.h"
#include "net/log/net_log_with_source.h"
#include "net/proxy_resolution/proxy_info.h"
#include "net/test/event_waiter.h"
#include "net/test/gtest_util.h"
#include "net/test/test_with_scoped_task_environment.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
using net::test::IsError;
using net::test::IsOk;
namespace net {
namespace {
class ProxyResolverV8TracingTest : public TestWithScopedTaskEnvironment {
public:
void TearDown() override {
// Drain any pending messages, which may be left over from cancellation.
// This way they get reliably run as part of the current test, rather than
// spilling into the next test's execution.
base::RunLoop().RunUntilIdle();
}
};
scoped_refptr<PacFileData> LoadScriptData(const char* filename) {
base::FilePath path;
base::PathService::Get(base::DIR_SOURCE_ROOT, &path);
path = path.AppendASCII("net");
path = path.AppendASCII("data");
path = path.AppendASCII("proxy_resolver_v8_tracing_unittest");
path = path.AppendASCII(filename);
// Try to read the file from disk.
std::string file_contents;
bool ok = base::ReadFileToString(path, &file_contents);
// If we can't load the file from disk, something is misconfigured.
EXPECT_TRUE(ok) << "Failed to read file: " << path.value();
// Load the PAC script into the ProxyResolver.
return PacFileData::FromUTF8(file_contents);
}
class MockBindings {
public:
explicit MockBindings(HostResolver* host_resolver)
: host_resolver_(host_resolver) {}
void Alert(const base::string16& message) {
alerts_.push_back(base::UTF16ToASCII(message));
}
void OnError(int line_number, const base::string16& error) {
waiter_.NotifyEvent(EVENT_ERROR);
errors_.push_back(std::make_pair(line_number, base::UTF16ToASCII(error)));
if (!error_callback_.is_null())
error_callback_.Run();
}
HostResolver* host_resolver() { return host_resolver_; }
std::vector<std::string> GetAlerts() {
return alerts_;
}
std::vector<std::pair<int, std::string>> GetErrors() {
return errors_;
}
void RunOnError(const base::Closure& callback) {
error_callback_ = callback;
waiter_.WaitForEvent(EVENT_ERROR);
}
std::unique_ptr<ProxyResolverV8Tracing::Bindings> CreateBindings() {
return std::make_unique<ForwardingBindings>(this);
}
private:
class ForwardingBindings : public ProxyResolverV8Tracing::Bindings {
public:
explicit ForwardingBindings(MockBindings* bindings) : bindings_(bindings) {}
// ProxyResolverV8Tracing::Bindings overrides.
void Alert(const base::string16& message) override {
DCHECK(thread_checker_.CalledOnValidThread());
bindings_->Alert(message);
}
void OnError(int line_number, const base::string16& error) override {
DCHECK(thread_checker_.CalledOnValidThread());
bindings_->OnError(line_number, error);
}
NetLogWithSource GetNetLogWithSource() override {
DCHECK(thread_checker_.CalledOnValidThread());
return NetLogWithSource();
}
HostResolver* GetHostResolver() override {
DCHECK(thread_checker_.CalledOnValidThread());
return bindings_->host_resolver();
}
private:
MockBindings* bindings_;
base::ThreadChecker thread_checker_;
};
enum Event {
EVENT_ERROR,
};
std::vector<std::string> alerts_;
std::vector<std::pair<int, std::string>> errors_;
HostResolver* const host_resolver_;
base::Closure error_callback_;
EventWaiter<Event> waiter_;
};
std::unique_ptr<ProxyResolverV8Tracing> CreateResolver(
std::unique_ptr<ProxyResolverV8Tracing::Bindings> bindings,
const char* filename) {
std::unique_ptr<ProxyResolverV8Tracing> resolver;
std::unique_ptr<ProxyResolverV8TracingFactory> factory(
ProxyResolverV8TracingFactory::Create());
TestCompletionCallback callback;
std::unique_ptr<ProxyResolverFactory::Request> request;
factory->CreateProxyResolverV8Tracing(LoadScriptData(filename),
std::move(bindings), &resolver,
callback.callback(), &request);
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_TRUE(resolver);
return resolver;
}
TEST_F(ProxyResolverV8TracingTest, Simple) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "simple.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("foo:99", proxy_info.proxy_server().ToURI());
EXPECT_EQ(0u, host_resolver.num_resolve());
// There were no alerts or errors.
EXPECT_TRUE(mock_bindings.GetAlerts().empty());
EXPECT_TRUE(mock_bindings.GetErrors().empty());
}
TEST_F(ProxyResolverV8TracingTest, JavascriptError) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "error.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://throw-an-error/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsError(ERR_PAC_SCRIPT_FAILED));
EXPECT_EQ(0u, host_resolver.num_resolve());
// Check the output -- there was 1 alert and 1 javascript error.
ASSERT_EQ(1u, mock_bindings.GetAlerts().size());
EXPECT_EQ("Prepare to DIE!", mock_bindings.GetAlerts()[0]);
ASSERT_EQ(1u, mock_bindings.GetErrors().size());
EXPECT_EQ(5, mock_bindings.GetErrors()[0].first);
EXPECT_EQ("Uncaught TypeError: Cannot read property 'split' of null",
mock_bindings.GetErrors()[0].second);
}
TEST_F(ProxyResolverV8TracingTest, TooManyAlerts) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "too_many_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
// Iteration1 does a DNS resolve
// Iteration2 exceeds the alert buffer
// Iteration3 runs in blocking mode and completes
EXPECT_EQ("foo:3", proxy_info.proxy_server().ToURI());
EXPECT_EQ(1u, host_resolver.num_resolve());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
// Check the alerts -- the script generated 50 alerts.
std::vector<std::string> alerts = mock_bindings.GetAlerts();
ASSERT_EQ(50u, alerts.size());
for (size_t i = 0; i < alerts.size(); i++) {
EXPECT_EQ("Gee, all these alerts are silly!", alerts[i]);
}
}
// Verify that buffered alerts cannot grow unboundedly, even when the message is
// empty string.
TEST_F(ProxyResolverV8TracingTest, TooManyEmptyAlerts) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver = CreateResolver(
mock_bindings.CreateBindings(), "too_many_empty_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("foo:3", proxy_info.proxy_server().ToURI());
EXPECT_EQ(1u, host_resolver.num_resolve());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
// Check the alerts -- the script generated 1000 alerts.
std::vector<std::string> alerts = mock_bindings.GetAlerts();
ASSERT_EQ(1000u, alerts.size());
for (size_t i = 0; i < alerts.size(); i++) {
EXPECT_EQ("", alerts[i]);
}
}
// This test runs a PAC script that issues a sequence of DNS resolves. The test
// verifies the final result, and that the underlying DNS resolver received
// the correct set of queries.
TEST_F(ProxyResolverV8TracingTest, Dns) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRuleForAddressFamily(
"host1", ADDRESS_FAMILY_IPV4, "166.155.144.44");
host_resolver.rules()
->AddIPLiteralRule("host1", "::1,192.168.1.1", std::string());
host_resolver.rules()->AddSimulatedFailure("host2");
host_resolver.rules()->AddRule("host3", "166.155.144.33");
host_resolver.rules()->AddRule("host5", "166.155.144.55");
host_resolver.rules()->AddSimulatedFailure("host6");
host_resolver.rules()->AddRuleForAddressFamily(
"*", ADDRESS_FAMILY_IPV4, "122.133.144.155");
host_resolver.rules()->AddRule("*", "133.122.100.200");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
// The test does 13 DNS resolution, however only 7 of them are unique.
EXPECT_EQ(7u, host_resolver.num_resolve());
const char* kExpectedResult =
"122.133.144.155-" // myIpAddress()
"null-" // dnsResolve('')
"__1_192.168.1.1-" // dnsResolveEx('host1')
"null-" // dnsResolve('host2')
"166.155.144.33-" // dnsResolve('host3')
"122.133.144.155-" // myIpAddress()
"166.155.144.33-" // dnsResolve('host3')
"__1_192.168.1.1-" // dnsResolveEx('host1')
"122.133.144.155-" // myIpAddress()
"null-" // dnsResolve('host2')
"-" // dnsResolveEx('host6')
"133.122.100.200-" // myIpAddressEx()
"166.155.144.44" // dnsResolve('host1')
":99";
EXPECT_EQ(kExpectedResult, proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
// The script generated 1 alert.
ASSERT_EQ(1u, mock_bindings.GetAlerts().size());
EXPECT_EQ("iteration: 7", mock_bindings.GetAlerts()[0]);
}
// This test runs a PAC script that does "myIpAddress()" followed by
// "dnsResolve()". This requires 2 restarts. However once the HostResolver's
// cache is warmed, subsequent calls should take 0 restarts.
TEST_F(ProxyResolverV8TracingTest, DnsChecksCache) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("foopy", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "simple_dns.js");
TestCompletionCallback callback1;
TestCompletionCallback callback2;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foopy/req1"), &proxy_info,
callback1.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback1.WaitForResult(), IsOk());
// The test does 2 DNS resolutions.
EXPECT_EQ(2u, host_resolver.num_resolve());
// The first request took 2 restarts, hence on g_iteration=3.
EXPECT_EQ("166.155.144.11:3", proxy_info.proxy_server().ToURI());
std::unique_ptr<ProxyResolver::Request> req2;
resolver->GetProxyForURL(GURL("http://foopy/req2"), &proxy_info,
callback2.callback(), &req2,
mock_bindings.CreateBindings());
EXPECT_THAT(callback2.WaitForResult(), IsOk());
EXPECT_EQ(4u, host_resolver.num_resolve());
// This time no restarts were required, so g_iteration incremented by 1.
EXPECT_EQ("166.155.144.11:4", proxy_info.proxy_server().ToURI());
// There were no alerts or errors.
EXPECT_TRUE(mock_bindings.GetAlerts().empty());
EXPECT_TRUE(mock_bindings.GetErrors().empty());
}
// This test runs a weird PAC script that was designed to defeat the DNS tracing
// optimization. The proxy resolver should detect the inconsistency and
// fall-back to synchronous mode execution.
TEST_F(ProxyResolverV8TracingTest, FallBackToSynchronous1) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("host1", "166.155.144.11");
host_resolver.rules()->AddRule("crazy4", "133.199.111.4");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "global_sideffects1.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
// The script itself only does 2 DNS resolves per execution, however it
// constructs the hostname using a global counter which changes on each
// invocation.
EXPECT_EQ(3u, host_resolver.num_resolve());
EXPECT_EQ("166.155.144.11-133.199.111.4:100",
proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
ASSERT_EQ(1u, mock_bindings.GetAlerts().size());
EXPECT_EQ("iteration: 4", mock_bindings.GetAlerts()[0]);
}
// This test runs a weird PAC script that was designed to defeat the DNS tracing
// optimization. The proxy resolver should detect the inconsistency and
// fall-back to synchronous mode execution.
TEST_F(ProxyResolverV8TracingTest, FallBackToSynchronous2) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("host1", "166.155.144.11");
host_resolver.rules()->AddRule("host2", "166.155.144.22");
host_resolver.rules()->AddRule("host3", "166.155.144.33");
host_resolver.rules()->AddRule("host4", "166.155.144.44");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "global_sideffects2.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(3u, host_resolver.num_resolve());
EXPECT_EQ("166.155.144.44:100", proxy_info.proxy_server().ToURI());
// There were no alerts or errors.
EXPECT_TRUE(mock_bindings.GetAlerts().empty());
EXPECT_TRUE(mock_bindings.GetErrors().empty());
}
// This test runs a weird PAC script that yields a never ending sequence
// of DNS resolves when restarting. Running it will hit the maximum
// DNS resolves per request limit (20) after which every DNS resolve will
// fail.
TEST_F(ProxyResolverV8TracingTest, InfiniteDNSSequence) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "global_sideffects3.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(20u, host_resolver.num_resolve());
EXPECT_EQ(
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"null:21", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
// 1 alert.
EXPECT_EQ(1u, mock_bindings.GetAlerts().size());
EXPECT_EQ("iteration: 21", mock_bindings.GetAlerts()[0]);
}
// This test runs a weird PAC script that yields a never ending sequence
// of DNS resolves when restarting. Running it will hit the maximum
// DNS resolves per request limit (20) after which every DNS resolve will
// fail.
TEST_F(ProxyResolverV8TracingTest, InfiniteDNSSequence2) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "global_sideffects4.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(20u, host_resolver.num_resolve());
EXPECT_EQ("null21:34", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
// 1 alert.
EXPECT_EQ(1u, mock_bindings.GetAlerts().size());
EXPECT_EQ("iteration: 21", mock_bindings.GetAlerts()[0]);
}
void DnsDuringInitHelper(bool synchronous_host_resolver) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.set_synchronous_mode(synchronous_host_resolver);
host_resolver.rules()->AddRule("host1", "91.13.12.1");
host_resolver.rules()->AddRule("host2", "91.13.12.2");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns_during_init.js");
// Initialization did 2 dnsResolves.
EXPECT_EQ(2u, host_resolver.num_resolve());
host_resolver.rules()->ClearRules();
host_resolver.GetHostCache()->clear();
host_resolver.rules()->AddRule("host1", "145.88.13.3");
host_resolver.rules()->AddRule("host2", "137.89.8.45");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
// Fetched host1 and host2 again, since the ones done during initialization
// should not have been cached.
EXPECT_EQ(4u, host_resolver.num_resolve());
EXPECT_EQ("91.13.12.1-91.13.12.2-145.88.13.3-137.89.8.45:99",
proxy_info.proxy_server().ToURI());
// 2 alerts.
ASSERT_EQ(2u, mock_bindings.GetAlerts().size());
EXPECT_EQ("Watsup", mock_bindings.GetAlerts()[0]);
EXPECT_EQ("Watsup2", mock_bindings.GetAlerts()[1]);
}
// Tests a PAC script which does DNS resolves during initialization.
TEST_F(ProxyResolverV8TracingTest, DnsDuringInit) {
// Test with both both a host resolver that always completes asynchronously,
// and then again with one that completes synchronously.
DnsDuringInitHelper(false);
DnsDuringInitHelper(true);
}
void CrashCallback(int) {
// Be extra sure that if the callback ever gets invoked, the test will fail.
CHECK(false);
}
// Start some requests, cancel them all, and then destroy the resolver.
// Note the execution order for this test can vary. Since multiple
// threads are involved, the cancellation may be received a different
// times.
TEST_F(ProxyResolverV8TracingTest, CancelAll) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
const size_t kNumRequests = 5;
ProxyInfo proxy_info[kNumRequests];
std::unique_ptr<ProxyResolver::Request> request[kNumRequests];
for (size_t i = 0; i < kNumRequests; ++i) {
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info[i],
base::Bind(&CrashCallback), &request[i],
mock_bindings.CreateBindings());
}
for (size_t i = 0; i < kNumRequests; ++i) {
request[i].reset();
}
}
// Note the execution order for this test can vary. Since multiple
// threads are involved, the cancellation may be received a different
// times.
TEST_F(ProxyResolverV8TracingTest, CancelSome) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
TestCompletionCallback callback;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info1,
base::Bind(&CrashCallback), &request1,
mock_bindings.CreateBindings());
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info2,
callback.callback(), &request2,
mock_bindings.CreateBindings());
request1.reset();
EXPECT_THAT(callback.WaitForResult(), IsOk());
}
// Cancel a request after it has finished running on the worker thread, and has
// posted a task the completion task back to origin thread.
TEST_F(ProxyResolverV8TracingTest, CancelWhilePendingCompletionTask) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "error.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
TestCompletionCallback callback;
resolver->GetProxyForURL(GURL("http://throw-an-error/"), &proxy_info1,
base::Bind(&CrashCallback), &request1,
mock_bindings.CreateBindings());
// Wait until the first request has finished running on the worker thread.
// Cancel the first request, while it is running its completion task on
// the origin thread. Reset deletes Request opject which cancels the request.
mock_bindings.RunOnError(
base::Bind(&std::unique_ptr<ProxyResolver::Request>::reset,
base::Unretained(&request1), nullptr));
// Start another request, to make sure it is able to complete.
resolver->GetProxyForURL(GURL("http://i-have-no-idea-what-im-doing/"),
&proxy_info2, callback.callback(), &request2,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("i-approve-this-message:42", proxy_info2.proxy_server().ToURI());
}
// This implementation of HostResolver allows blocking until a resolve request
// has been received. The resolve requests it receives will never be completed.
class BlockableHostResolver : public HostResolver {
public:
BlockableHostResolver()
: num_cancelled_requests_(0), waiting_for_resolve_(false) {}
int Resolve(const RequestInfo& info,
RequestPriority priority,
AddressList* addresses,
const CompletionCallback& callback,
std::unique_ptr<Request>* out_req,
const NetLogWithSource& net_log) override {
EXPECT_FALSE(callback.is_null());
EXPECT_TRUE(out_req);
if (!action_.is_null())
action_.Run();
// Indicate to the caller that a request was received.
EXPECT_TRUE(waiting_for_resolve_);
base::RunLoop::QuitCurrentWhenIdleDeprecated();
// This line is intentionally after action_.Run(), since one of the
// tests does a cancellation inside of Resolve(), and it is more
// interesting if *out_req hasn't been written yet at that point.
out_req->reset(new RequestImpl(this));
// Return ERR_IO_PENDING as this request will NEVER be completed.
// Expectation is for the caller to later cancel the request.
return ERR_IO_PENDING;
}
int ResolveFromCache(const RequestInfo& info,
AddressList* addresses,
const NetLogWithSource& net_log) override {
NOTREACHED();
return ERR_DNS_CACHE_MISS;
}
int ResolveStaleFromCache(const RequestInfo& info,
AddressList* addresses,
HostCache::EntryStaleness* stale_info,
const NetLogWithSource& net_log) override {
NOTREACHED();
return ERR_DNS_CACHE_MISS;
}
bool HasCached(base::StringPiece hostname,
HostCache::Entry::Source* source_out,
HostCache::EntryStaleness* stale_out) const override {
NOTIMPLEMENTED();
return false;
}
void IncreaseNumOfCancelledRequests() { num_cancelled_requests_++; }
void SetAction(const base::Callback<void(void)>& action) {
action_ = action;
}
// Waits until Resolve() has been called.
void WaitUntilRequestIsReceived() {
waiting_for_resolve_ = true;
base::RunLoop().Run();
DCHECK(waiting_for_resolve_);
waiting_for_resolve_ = false;
}
int num_cancelled_requests() const {
return num_cancelled_requests_;
}
private:
class RequestImpl : public HostResolver::Request {
public:
RequestImpl(BlockableHostResolver* resolver) : resolver_(resolver) {}
~RequestImpl() override {
if (resolver_)
resolver_->IncreaseNumOfCancelledRequests();
}
void ChangeRequestPriority(RequestPriority priority) override {}
private:
BlockableHostResolver* resolver_;
DISALLOW_COPY_AND_ASSIGN(RequestImpl);
};
int num_cancelled_requests_;
bool waiting_for_resolve_;
base::Callback<void(void)> action_;
};
// This cancellation test exercises a more predictable cancellation codepath --
// when the request has an outstanding DNS request in flight.
TEST_F(ProxyResolverV8TracingTest, CancelWhileOutstandingNonBlockingDns) {
BlockableHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
resolver->GetProxyForURL(GURL("http://foo/req1"), &proxy_info1,
base::Bind(&CrashCallback), &request1,
mock_bindings.CreateBindings());
host_resolver.WaitUntilRequestIsReceived();
resolver->GetProxyForURL(GURL("http://foo/req2"), &proxy_info2,
base::Bind(&CrashCallback), &request2,
mock_bindings.CreateBindings());
host_resolver.WaitUntilRequestIsReceived();
request1.reset();
request2.reset();
EXPECT_EQ(2, host_resolver.num_cancelled_requests());
// After leaving this scope, the ProxyResolver is destroyed.
// This should not cause any problems, as the outstanding work
// should have been cancelled.
}
void CancelRequestAndPause(std::unique_ptr<ProxyResolver::Request>* request) {
request->reset();
// Sleep for a little bit. This makes it more likely for the worker
// thread to have returned from its call, and serves as a regression
// test for http://crbug.com/173373.
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(30));
}
// In non-blocking mode, the worker thread actually does block for
// a short time to see if the result is in the DNS cache. Test
// cancellation while the worker thread is waiting on this event.
TEST_F(ProxyResolverV8TracingTest, CancelWhileBlockedInNonBlockingDns) {
BlockableHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> request;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request,
mock_bindings.CreateBindings());
host_resolver.SetAction(base::Bind(CancelRequestAndPause, &request));
host_resolver.WaitUntilRequestIsReceived();
}
// Cancel the request while there is a pending DNS request, however before
// the request is sent to the host resolver.
TEST_F(ProxyResolverV8TracingTest, CancelWhileBlockedInNonBlockingDns2) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "dns.js");
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> request;
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request,
mock_bindings.CreateBindings());
// Wait a bit, so the DNS task has hopefully been posted. The test will
// work whatever the delay is here, but it is most useful if the delay
// is large enough to allow a task to be posted back.
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(10));
request.reset();
EXPECT_EQ(0u, host_resolver.num_resolve());
}
TEST_F(ProxyResolverV8TracingTest,
CancelCreateResolverWhileOutstandingBlockingDns) {
BlockableHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8TracingFactory> factory(
ProxyResolverV8TracingFactory::Create());
std::unique_ptr<ProxyResolverV8Tracing> resolver;
std::unique_ptr<ProxyResolverFactory::Request> request;
factory->CreateProxyResolverV8Tracing(
LoadScriptData("dns_during_init.js"), mock_bindings.CreateBindings(),
&resolver, base::Bind(&CrashCallback), &request);
host_resolver.WaitUntilRequestIsReceived();
request.reset();
EXPECT_EQ(1, host_resolver.num_cancelled_requests());
}
TEST_F(ProxyResolverV8TracingTest, DeleteFactoryWhileOutstandingBlockingDns) {
BlockableHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8Tracing> resolver;
std::unique_ptr<ProxyResolverFactory::Request> request;
{
std::unique_ptr<ProxyResolverV8TracingFactory> factory(
ProxyResolverV8TracingFactory::Create());
factory->CreateProxyResolverV8Tracing(
LoadScriptData("dns_during_init.js"), mock_bindings.CreateBindings(),
&resolver, base::Bind(&CrashCallback), &request);
host_resolver.WaitUntilRequestIsReceived();
}
EXPECT_EQ(1, host_resolver.num_cancelled_requests());
}
TEST_F(ProxyResolverV8TracingTest, ErrorLoadingScript) {
BlockableHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
std::unique_ptr<ProxyResolverV8TracingFactory> factory(
ProxyResolverV8TracingFactory::Create());
std::unique_ptr<ProxyResolverV8Tracing> resolver;
std::unique_ptr<ProxyResolverFactory::Request> request;
TestCompletionCallback callback;
factory->CreateProxyResolverV8Tracing(
LoadScriptData("error_on_load.js"), mock_bindings.CreateBindings(),
&resolver, callback.callback(), &request);
EXPECT_THAT(callback.WaitForResult(), IsError(ERR_PAC_SCRIPT_FAILED));
EXPECT_FALSE(resolver);
}
// This tests that the execution of a PAC script is terminated when the DNS
// dependencies are missing. If the test fails, then it will hang.
TEST_F(ProxyResolverV8TracingTest, Terminate) {
MockCachingHostResolver host_resolver;
MockBindings mock_bindings(&host_resolver);
host_resolver.rules()->AddRule("host1", "182.111.0.222");
host_resolver.rules()->AddRule("host2", "111.33.44.55");
std::unique_ptr<ProxyResolverV8Tracing> resolver =
CreateResolver(mock_bindings.CreateBindings(), "terminate.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
resolver->GetProxyForURL(GURL("http://foopy/req1"), &proxy_info,
callback.callback(), &req,
mock_bindings.CreateBindings());
EXPECT_THAT(callback.WaitForResult(), IsOk());
// The test does 2 DNS resolutions.
EXPECT_EQ(2u, host_resolver.num_resolve());
EXPECT_EQ("foopy:3", proxy_info.proxy_server().ToURI());
// No errors or alerts.
EXPECT_TRUE(mock_bindings.GetErrors().empty());
EXPECT_TRUE(mock_bindings.GetAlerts().empty());
}
// Tests that multiple instances of ProxyResolverV8Tracing can coexist and run
// correctly at the same time. This is relevant because at the moment (time
// this test was written) each ProxyResolverV8Tracing creates its own thread to
// run V8 on, however each thread is operating on the same v8::Isolate.
TEST_F(ProxyResolverV8TracingTest, MultipleResolvers) {
// ------------------------
// Setup resolver0
// ------------------------
MockHostResolver host_resolver0;
MockBindings mock_bindings0(&host_resolver0);
host_resolver0.rules()->AddRuleForAddressFamily(
"host1", ADDRESS_FAMILY_IPV4, "166.155.144.44");
host_resolver0.rules()
->AddIPLiteralRule("host1", "::1,192.168.1.1", std::string());
host_resolver0.rules()->AddSimulatedFailure("host2");
host_resolver0.rules()->AddRule("host3", "166.155.144.33");
host_resolver0.rules()->AddRule("host5", "166.155.144.55");
host_resolver0.rules()->AddSimulatedFailure("host6");
host_resolver0.rules()->AddRuleForAddressFamily(
"*", ADDRESS_FAMILY_IPV4, "122.133.144.155");
host_resolver0.rules()->AddRule("*", "133.122.100.200");
std::unique_ptr<ProxyResolverV8Tracing> resolver0 =
CreateResolver(mock_bindings0.CreateBindings(), "dns.js");
// ------------------------
// Setup resolver1
// ------------------------
std::unique_ptr<ProxyResolverV8Tracing> resolver1 =
CreateResolver(mock_bindings0.CreateBindings(), "dns.js");
// ------------------------
// Setup resolver2
// ------------------------
std::unique_ptr<ProxyResolverV8Tracing> resolver2 =
CreateResolver(mock_bindings0.CreateBindings(), "simple.js");
// ------------------------
// Setup resolver3
// ------------------------