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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/proxy_resolver_v8_tracing.h"
#include "base/file_util.h"
#include "base/message_loop/message_loop.h"
#include "base/path_service.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/platform_thread.h"
#include "base/values.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/base/net_log_unittest.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/host_cache.h"
#include "net/dns/mock_host_resolver.h"
#include "net/proxy/proxy_info.h"
#include "net/proxy/proxy_resolver_error_observer.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace net {
namespace {
class ProxyResolverV8TracingTest : public testing::Test {
public:
virtual 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::MessageLoop::current()->RunUntilIdle();
}
};
scoped_refptr<ProxyResolverScriptData> LoadScriptData(const char* filename) {
base::FilePath path;
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 ProxyResolverScriptData::FromUTF8(file_contents);
}
void InitResolver(ProxyResolverV8Tracing* resolver, const char* filename) {
TestCompletionCallback callback;
int rv =
resolver->SetPacScript(LoadScriptData(filename), callback.callback());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
}
class MockErrorObserver : public ProxyResolverErrorObserver {
public:
MockErrorObserver() : event_(true, false) {}
virtual void OnPACScriptError(int line_number,
const base::string16& error) OVERRIDE {
{
base::AutoLock l(lock_);
output += base::StringPrintf("Error: line %d: %s\n", line_number,
UTF16ToASCII(error).c_str());
}
event_.Signal();
}
std::string GetOutput() {
base::AutoLock l(lock_);
return output;
}
void WaitForOutput() {
event_.Wait();
}
private:
base::Lock lock_;
std::string output;
base::WaitableEvent event_;
};
TEST_F(ProxyResolverV8TracingTest, Simple) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
InitResolver(&resolver, "simple.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(),
NULL, request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
EXPECT_EQ("foo:99", proxy_info.proxy_server().ToURI());
EXPECT_EQ(0u, host_resolver.num_resolve());
// There were no errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- nothing was logged.
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
TEST_F(ProxyResolverV8TracingTest, JavascriptError) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
InitResolver(&resolver, "error.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://throw-an-error/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(ERR_PAC_SCRIPT_FAILED, callback.WaitForResult());
EXPECT_EQ(0u, host_resolver.num_resolve());
EXPECT_EQ("Error: line 5: Uncaught TypeError: Cannot read property 'split' "
"of null\n", error_observer->GetOutput());
// Check the NetLogs -- there was 1 alert and 1 javascript error, and they
// were output to both the global log, and per-request log.
CapturingNetLog::CapturedEntryList entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const CapturingNetLog::CapturedEntryList& entries = entries_list[list_i];
EXPECT_EQ(2u, entries.size());
EXPECT_TRUE(
LogContainsEvent(entries, 0, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
EXPECT_TRUE(
LogContainsEvent(entries, 1, NetLog::TYPE_PAC_JAVASCRIPT_ERROR,
NetLog::PHASE_NONE));
EXPECT_EQ("{\"message\":\"Prepare to DIE!\"}", entries[0].GetParamsJson());
EXPECT_EQ("{\"line_number\":5,\"message\":\"Uncaught TypeError: Cannot "
"read property 'split' of null\"}", entries[1].GetParamsJson());
}
}
TEST_F(ProxyResolverV8TracingTest, TooManyAlerts) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
InitResolver(&resolver, "too_many_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"),
&proxy_info,
callback.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
// 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_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 50 alerts, which were mirrored
// to both the global and per-request logs.
CapturingNetLog::CapturedEntryList entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const CapturingNetLog::CapturedEntryList& entries = entries_list[list_i];
EXPECT_EQ(50u, entries.size());
for (size_t i = 0; i < entries.size(); ++i) {
ASSERT_TRUE(
LogContainsEvent(entries, i, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
}
}
}
// Verify that buffered alerts cannot grow unboundedly, even when the message is
// empty string.
TEST_F(ProxyResolverV8TracingTest, TooManyEmptyAlerts) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
InitResolver(&resolver, "too_many_empty_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"),
&proxy_info,
callback.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
EXPECT_EQ("foo:3", proxy_info.proxy_server().ToURI());
EXPECT_EQ(1u, host_resolver.num_resolve());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 50 alerts, which were mirrored
// to both the global and per-request logs.
CapturingNetLog::CapturedEntryList entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const CapturingNetLog::CapturedEntryList& entries = entries_list[list_i];
EXPECT_EQ(1000u, entries.size());
for (size_t i = 0; i < entries.size(); ++i) {
ASSERT_TRUE(
LogContainsEvent(entries, i, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
}
}
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
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");
InitResolver(&resolver, "dns.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"),
&proxy_info,
callback.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
// 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_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 1 alert, mirrored to both
// the per-request and global logs.
CapturingNetLog::CapturedEntryList entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const CapturingNetLog::CapturedEntryList& entries = entries_list[list_i];
EXPECT_EQ(1u, entries.size());
EXPECT_TRUE(
LogContainsEvent(entries, 0, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
EXPECT_EQ("{\"message\":\"iteration: 7\"}", entries[0].GetParamsJson());
}
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
host_resolver.rules()->AddRule("foopy", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
InitResolver(&resolver, "simple_dns.js");
TestCompletionCallback callback1;
TestCompletionCallback callback2;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foopy/req1"),
&proxy_info,
callback1.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback1.WaitForResult());
// 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());
rv = resolver.GetProxyForURL(
GURL("http://foopy/req2"),
&proxy_info,
callback2.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback2.WaitForResult());
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());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
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");
InitResolver(&resolver, "global_sideffects1.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
// 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_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 1 alert, mirrored to both
// the per-request and global logs.
CapturingNetLog::CapturedEntryList entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const CapturingNetLog::CapturedEntryList& entries = entries_list[list_i];
EXPECT_EQ(1u, entries.size());
EXPECT_TRUE(
LogContainsEvent(entries, 0, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
EXPECT_EQ("{\"message\":\"iteration: 4\"}", entries[0].GetParamsJson());
}
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
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");
InitResolver(&resolver, "global_sideffects2.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
EXPECT_EQ(3u, host_resolver.num_resolve());
EXPECT_EQ("166.155.144.44:100", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- nothing was logged.
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
InitResolver(&resolver, "global_sideffects3.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
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_EQ("", error_observer->GetOutput());
// Check the NetLogs -- 1 alert was logged.
EXPECT_EQ(1u, log.GetSize());
EXPECT_EQ(1u, request_log.GetSize());
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
InitResolver(&resolver, "global_sideffects4.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
EXPECT_EQ(20u, host_resolver.num_resolve());
EXPECT_EQ("null21:34", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- 1 alert was logged.
EXPECT_EQ(1u, log.GetSize());
EXPECT_EQ(1u, request_log.GetSize());
}
void DnsDuringInitHelper(bool synchronous_host_resolver) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
host_resolver.set_synchronous_mode(synchronous_host_resolver);
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
host_resolver.rules()->AddRule("host1", "91.13.12.1");
host_resolver.rules()->AddRule("host2", "91.13.12.2");
InitResolver(&resolver, "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;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info, callback.callback(), NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
// 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());
// Check the NetLogs -- the script generated 2 alerts during initialization.
EXPECT_EQ(0u, request_log.GetSize());
CapturingNetLog::CapturedEntryList entries;
log.GetEntries(&entries);
ASSERT_EQ(2u, entries.size());
EXPECT_TRUE(
LogContainsEvent(entries, 0, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
EXPECT_TRUE(
LogContainsEvent(entries, 1, NetLog::TYPE_PAC_JAVASCRIPT_ALERT,
NetLog::PHASE_NONE));
EXPECT_EQ("{\"message\":\"Watsup\"}", entries[0].GetParamsJson());
EXPECT_EQ("{\"message\":\"Watsup2\"}", entries[1].GetParamsJson());
}
// 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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
host_resolver.rules()->AddSimulatedFailure("*");
InitResolver(&resolver, "dns.js");
const size_t kNumRequests = 5;
ProxyInfo proxy_info[kNumRequests];
ProxyResolver::RequestHandle request[kNumRequests];
for (size_t i = 0; i < kNumRequests; ++i) {
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info[i],
base::Bind(&CrashCallback), &request[i], BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
}
for (size_t i = 0; i < kNumRequests; ++i) {
resolver.CancelRequest(request[i]);
}
}
// 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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
host_resolver.rules()->AddSimulatedFailure("*");
InitResolver(&resolver, "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
ProxyResolver::RequestHandle request1;
ProxyResolver::RequestHandle request2;
TestCompletionCallback callback;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info1,
base::Bind(&CrashCallback), &request1, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info2,
callback.callback(), &request2, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
resolver.CancelRequest(request1);
EXPECT_EQ(OK, callback.WaitForResult());
}
// 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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
host_resolver.rules()->AddSimulatedFailure("*");
InitResolver(&resolver, "error.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
ProxyInfo proxy_info3;
ProxyResolver::RequestHandle request1;
ProxyResolver::RequestHandle request2;
ProxyResolver::RequestHandle request3;
TestCompletionCallback callback;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info1,
base::Bind(&CrashCallback), &request1, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = resolver.GetProxyForURL(
GURL("http://throw-an-error/"), &proxy_info2,
callback.callback(), &request2, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
// Wait until the first request has finished running on the worker thread.
// (The second request will output an error).
error_observer->WaitForOutput();
// Cancel the first request, while it has a pending completion task on
// the origin thread.
resolver.CancelRequest(request1);
EXPECT_EQ(ERR_PAC_SCRIPT_FAILED, callback.WaitForResult());
// Start another request, to make sure it is able to complete.
rv = resolver.GetProxyForURL(
GURL("http://i-have-no-idea-what-im-doing/"), &proxy_info3,
callback.callback(), &request3, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
EXPECT_EQ("i-approve-this-message:42",
proxy_info3.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) {}
virtual int Resolve(const RequestInfo& info,
RequestPriority priority,
AddressList* addresses,
const CompletionCallback& callback,
RequestHandle* out_req,
const BoundNetLog& 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::MessageLoop::current()->Quit();
// 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 = reinterpret_cast<RequestHandle*>(1); // Magic value.
// 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;
}
virtual int ResolveFromCache(const RequestInfo& info,
AddressList* addresses,
const BoundNetLog& net_log) OVERRIDE {
NOTREACHED();
return ERR_DNS_CACHE_MISS;
}
virtual void CancelRequest(RequestHandle req) OVERRIDE {
EXPECT_EQ(reinterpret_cast<RequestHandle*>(1), req);
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::MessageLoop::current()->Run();
DCHECK(waiting_for_resolve_);
waiting_for_resolve_ = false;
}
int num_cancelled_requests() const {
return num_cancelled_requests_;
}
private:
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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
InitResolver(&resolver, "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
ProxyResolver::RequestHandle request1;
ProxyResolver::RequestHandle request2;
int rv = resolver.GetProxyForURL(
GURL("http://foo/req1"), &proxy_info1,
base::Bind(&CrashCallback), &request1, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
host_resolver.WaitUntilRequestIsReceived();
rv = resolver.GetProxyForURL(
GURL("http://foo/req2"), &proxy_info2,
base::Bind(&CrashCallback), &request2, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
host_resolver.WaitUntilRequestIsReceived();
resolver.CancelRequest(request1);
resolver.CancelRequest(request2);
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(ProxyResolverV8Tracing* resolver,
ProxyResolver::RequestHandle request) {
resolver->CancelRequest(request);
// 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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
InitResolver(&resolver, "dns.js");
ProxyInfo proxy_info;
ProxyResolver::RequestHandle request;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
host_resolver.SetAction(
base::Bind(CancelRequestAndPause, &resolver, request));
host_resolver.WaitUntilRequestIsReceived();
// At this point the host resolver ran Resolve(), and should have cancelled
// the request.
EXPECT_EQ(1, host_resolver.num_cancelled_requests());
}
// 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;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
InitResolver(&resolver, "dns.js");
ProxyInfo proxy_info;
ProxyResolver::RequestHandle request;
int rv = resolver.GetProxyForURL(
GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request, BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
// 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));
resolver.CancelRequest(request);
EXPECT_EQ(0u, host_resolver.num_resolve());
}
TEST_F(ProxyResolverV8TracingTest, CancelSetPacWhileOutstandingBlockingDns) {
BlockableHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, NULL);
int rv =
resolver.SetPacScript(LoadScriptData("dns_during_init.js"),
base::Bind(&CrashCallback));
EXPECT_EQ(ERR_IO_PENDING, rv);
host_resolver.WaitUntilRequestIsReceived();
resolver.CancelSetPacScript();
EXPECT_EQ(1, host_resolver.num_cancelled_requests());
}
// 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) {
CapturingNetLog log;
CapturingBoundNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverV8Tracing resolver(&host_resolver, error_observer, &log);
host_resolver.rules()->AddRule("host1", "182.111.0.222");
host_resolver.rules()->AddRule("host2", "111.33.44.55");
InitResolver(&resolver, "terminate.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
int rv = resolver.GetProxyForURL(
GURL("http://foopy/req1"),
&proxy_info,
callback.callback(),
NULL,
request_log.bound());
EXPECT_EQ(ERR_IO_PENDING, rv);
EXPECT_EQ(OK, callback.WaitForResult());
// The test does 2 DNS resolutions.
EXPECT_EQ(2u, host_resolver.num_resolve());
EXPECT_EQ("foopy:3", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
// 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;
host_resolver0.rules()->AddRuleForAddressFamily(
"host1", ADDRESS_FAMILY_IPV4, "166.155.144.44");
host_resolver0.rules()