// 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/custom_handlers/protocol_handler_registry.h"

#include <stddef.h>

#include <memory>
#include <set>

#include "base/memory/ptr_util.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/common/custom_handlers/protocol_handler.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/testing_browser_process.h"
#include "chrome/test/base/testing_profile.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/sync_preferences/pref_service_syncable.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_source.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "content/public/test/test_renderer_host.h"
#include "net/base/request_priority.h"
#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_context.h"
#include "testing/gtest/include/gtest/gtest.h"

using content::BrowserThread;

namespace {

void AssertInterceptedIO(
    const GURL& url,
    net::URLRequestJobFactory* interceptor) {
  net::URLRequestContext context;
  std::unique_ptr<net::URLRequest> request(context.CreateRequest(
      url, net::DEFAULT_PRIORITY, nullptr, TRAFFIC_ANNOTATION_FOR_TESTS));
  std::unique_ptr<net::URLRequestJob> job(
      interceptor->MaybeCreateJobWithProtocolHandler(
          url.scheme(), request.get(), context.network_delegate()));
  ASSERT_TRUE(job.get());
}

void AssertIntercepted(
    const GURL& url,
    net::URLRequestJobFactory* interceptor) {
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::BindOnce(AssertInterceptedIO, url, base::Unretained(interceptor)));
  base::RunLoop().RunUntilIdle();
}

// FakeURLRequestJobFactory returns NULL for all job creation requests and false
// for all IsHandledProtocol() requests. FakeURLRequestJobFactory can be chained
// to ProtocolHandlerRegistry::JobInterceptorFactory so the result of
// MaybeCreateJobWithProtocolHandler() indicates whether the
// ProtocolHandlerRegistry properly handled a job creation request.
class FakeURLRequestJobFactory : public net::URLRequestJobFactory {
  // net::URLRequestJobFactory implementation:
  net::URLRequestJob* MaybeCreateJobWithProtocolHandler(
      const std::string& scheme,
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate) const override {
    return NULL;
  }

  net::URLRequestJob* MaybeInterceptRedirect(
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate,
      const GURL& location) const override {
    return nullptr;
  }

  net::URLRequestJob* MaybeInterceptResponse(
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate) const override {
    return nullptr;
  }

  bool IsHandledProtocol(const std::string& scheme) const override {
    return false;
  }
  bool IsSafeRedirectTarget(const GURL& location) const override {
    return true;
  }
};

void AssertWillHandleIO(
    const std::string& scheme,
    bool expected,
    ProtocolHandlerRegistry::JobInterceptorFactory* interceptor) {
  interceptor->Chain(std::unique_ptr<net::URLRequestJobFactory>(
      new FakeURLRequestJobFactory()));
  ASSERT_EQ(expected, interceptor->IsHandledProtocol(scheme));
  interceptor->Chain(std::unique_ptr<net::URLRequestJobFactory>());
}

void AssertWillHandle(
    const std::string& scheme,
    bool expected,
    ProtocolHandlerRegistry::JobInterceptorFactory* interceptor) {
  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                          base::BindOnce(AssertWillHandleIO, scheme, expected,
                                         base::Unretained(interceptor)));
  base::RunLoop().RunUntilIdle();
}

std::unique_ptr<base::DictionaryValue> GetProtocolHandlerValue(
    const std::string& protocol,
    const std::string& url) {
  auto value = base::MakeUnique<base::DictionaryValue>();
  value->SetString("protocol", protocol);
  value->SetString("url", url);
  return value;
}

std::unique_ptr<base::DictionaryValue> GetProtocolHandlerValueWithDefault(
    const std::string& protocol,
    const std::string& url,
    bool is_default) {
  std::unique_ptr<base::DictionaryValue> value =
      GetProtocolHandlerValue(protocol, url);
  value->SetBoolean("default", is_default);
  return value;
}

class FakeDelegate : public ProtocolHandlerRegistry::Delegate {
 public:
  FakeDelegate() : force_os_failure_(false) {}
  ~FakeDelegate() override {}
  void RegisterExternalHandler(const std::string& protocol) override {
    ASSERT_TRUE(
        registered_protocols_.find(protocol) == registered_protocols_.end());
    registered_protocols_.insert(protocol);
  }

  void DeregisterExternalHandler(const std::string& protocol) override {
    registered_protocols_.erase(protocol);
  }

  void RegisterWithOSAsDefaultClient(
      const std::string& protocol,
      ProtocolHandlerRegistry* registry) override {
    // Do as-if the registration has to run on another sequence and post back
    // the result with a task to the current thread.
    base::ThreadTaskRunnerHandle::Get()->PostTask(
        FROM_HERE,
        base::Bind(registry->GetDefaultWebClientCallback(protocol),
                   force_os_failure_ ? shell_integration::NOT_DEFAULT
                                     : shell_integration::IS_DEFAULT));

    if (!force_os_failure_)
      os_registered_protocols_.insert(protocol);
  }

  bool IsExternalHandlerRegistered(const std::string& protocol) override {
    return registered_protocols_.find(protocol) != registered_protocols_.end();
  }

  bool IsFakeRegisteredWithOS(const std::string& protocol) {
    return os_registered_protocols_.find(protocol) !=
        os_registered_protocols_.end();
  }

  void Reset() {
    registered_protocols_.clear();
    os_registered_protocols_.clear();
    force_os_failure_ = false;
  }

  void set_force_os_failure(bool force) { force_os_failure_ = force; }

  bool force_os_failure() { return force_os_failure_; }

 private:
  std::set<std::string> registered_protocols_;
  std::set<std::string> os_registered_protocols_;
  bool force_os_failure_;
};

class NotificationCounter : public content::NotificationObserver {
 public:
  explicit NotificationCounter(content::BrowserContext* context)
      : events_(0),
        notification_registrar_() {
    notification_registrar_.Add(this,
        chrome::NOTIFICATION_PROTOCOL_HANDLER_REGISTRY_CHANGED,
            content::Source<content::BrowserContext>(context));
  }

  int events() { return events_; }
  bool notified() { return events_ > 0; }
  void Clear() { events_ = 0; }
  void Observe(int type,
               const content::NotificationSource& source,
               const content::NotificationDetails& details) override {
    ++events_;
  }

  int events_;
  content::NotificationRegistrar notification_registrar_;
};

class QueryProtocolHandlerOnChange
    : public content::NotificationObserver {
 public:
  QueryProtocolHandlerOnChange(content::BrowserContext* context,
                               ProtocolHandlerRegistry* registry)
    : local_registry_(registry),
      called_(false),
      notification_registrar_() {
    notification_registrar_.Add(this,
        chrome::NOTIFICATION_PROTOCOL_HANDLER_REGISTRY_CHANGED,
            content::Source<content::BrowserContext>(context));
  }

  void Observe(int type,
               const content::NotificationSource& source,
               const content::NotificationDetails& details) override {
    std::vector<std::string> output;
    local_registry_->GetRegisteredProtocols(&output);
    called_ = true;
  }

  ProtocolHandlerRegistry* local_registry_;
  bool called_;
  content::NotificationRegistrar notification_registrar_;
};

}  // namespace

class ProtocolHandlerRegistryTest : public testing::Test {
 protected:
  ProtocolHandlerRegistryTest()
      : test_protocol_handler_(CreateProtocolHandler("test", "test")) {}

  FakeDelegate* delegate() const { return delegate_; }
  ProtocolHandlerRegistry* registry() { return registry_.get(); }
  TestingProfile* profile() const { return profile_.get(); }
  const ProtocolHandler& test_protocol_handler() const {
    return test_protocol_handler_;
  }

  ProtocolHandler CreateProtocolHandler(const std::string& protocol,
                                        const GURL& url) {
    return ProtocolHandler::CreateProtocolHandler(protocol, url);
  }

  ProtocolHandler CreateProtocolHandler(const std::string& protocol,
                                        const std::string& name) {
    return CreateProtocolHandler(protocol, GURL("http://" + name + "/%s"));
  }

  void RecreateRegistry(bool initialize) {
    TeadDownRegistry();
    SetUpRegistry(initialize);
  }

  int InPrefHandlerCount() {
    const base::ListValue* in_pref_handlers =
        profile()->GetPrefs()->GetList(prefs::kRegisteredProtocolHandlers);
    return static_cast<int>(in_pref_handlers->GetSize());
  }

  int InMemoryHandlerCount() {
    int in_memory_handler_count = 0;
    ProtocolHandlerRegistry::ProtocolHandlerMultiMap::iterator it =
        registry()->protocol_handlers_.begin();
    for (; it != registry()->protocol_handlers_.end(); ++it)
      in_memory_handler_count += it->second.size();
    return in_memory_handler_count;
  }

  int InPrefIgnoredHandlerCount() {
    const base::ListValue* in_pref_ignored_handlers =
        profile()->GetPrefs()->GetList(prefs::kIgnoredProtocolHandlers);
    return static_cast<int>(in_pref_ignored_handlers->GetSize());
  }

  int InMemoryIgnoredHandlerCount() {
    int in_memory_ignored_handler_count = 0;
    ProtocolHandlerRegistry::ProtocolHandlerList::iterator it =
        registry()->ignored_protocol_handlers_.begin();
    for (; it != registry()->ignored_protocol_handlers_.end(); ++it)
      in_memory_ignored_handler_count++;
    return in_memory_ignored_handler_count;
  }

  // Returns a new registry, initializing it if |initialize| is true.
  // Caller assumes ownership for the object
  void SetUpRegistry(bool initialize) {
    delegate_ = new FakeDelegate();
    registry_.reset(new ProtocolHandlerRegistry(profile(), delegate()));
    if (initialize) registry_->InitProtocolSettings();
  }

  void TeadDownRegistry() {
    registry_->Shutdown();
    registry_.reset();
    // Registry owns the delegate_ it handles deletion of that object.
  }

  void SetUp() override {
    profile_.reset(new TestingProfile());
    CHECK(profile_->GetPrefs());
    SetUpRegistry(true);
    test_protocol_handler_ =
        CreateProtocolHandler("test", GURL("http://test.com/%s"));
  }

  void TearDown() override { TeadDownRegistry(); }

 private:
  content::TestBrowserThreadBundle test_browser_thread_bundle_;

  std::unique_ptr<TestingProfile> profile_;
  FakeDelegate* delegate_;  // Registry assumes ownership of delegate_.
  std::unique_ptr<ProtocolHandlerRegistry> registry_;
  ProtocolHandler test_protocol_handler_;
};

TEST_F(ProtocolHandlerRegistryTest, AcceptProtocolHandlerHandlesProtocol) {
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, DeniedProtocolIsntHandledUntilAccepted) {
  registry()->OnDenyRegisterProtocolHandler(test_protocol_handler());
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, ClearDefaultMakesProtocolNotHandled) {
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  registry()->ClearDefault("test");
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
  ASSERT_TRUE(registry()->GetHandlerFor("test").IsEmpty());
}

TEST_F(ProtocolHandlerRegistryTest, DisableDeregistersProtocolHandlers) {
  ASSERT_FALSE(delegate()->IsExternalHandlerRegistered("test"));
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(delegate()->IsExternalHandlerRegistered("test"));

  registry()->Disable();
  ASSERT_FALSE(delegate()->IsExternalHandlerRegistered("test"));
  registry()->Enable();
  ASSERT_TRUE(delegate()->IsExternalHandlerRegistered("test"));
}

TEST_F(ProtocolHandlerRegistryTest, IgnoreProtocolHandler) {
  registry()->OnIgnoreRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->IsIgnored(test_protocol_handler()));

  registry()->RemoveIgnoredHandler(test_protocol_handler());
  ASSERT_FALSE(registry()->IsIgnored(test_protocol_handler()));
}

TEST_F(ProtocolHandlerRegistryTest, IgnoreEquivalentProtocolHandler) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", GURL("http://test/%s"));
  ProtocolHandler ph2 = CreateProtocolHandler("test", GURL("http://test/%s"));

  registry()->OnIgnoreRegisterProtocolHandler(ph1);
  ASSERT_TRUE(registry()->IsIgnored(ph1));
  ASSERT_TRUE(registry()->HasIgnoredEquivalent(ph2));

  registry()->RemoveIgnoredHandler(ph1);
  ASSERT_FALSE(registry()->IsIgnored(ph1));
  ASSERT_FALSE(registry()->HasIgnoredEquivalent(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, SaveAndLoad) {
  ProtocolHandler stuff_protocol_handler(
      CreateProtocolHandler("stuff", "stuff"));
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  registry()->OnIgnoreRegisterProtocolHandler(stuff_protocol_handler);

  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
  ASSERT_TRUE(registry()->IsIgnored(stuff_protocol_handler));
  delegate()->Reset();
  RecreateRegistry(true);
  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
  ASSERT_TRUE(registry()->IsIgnored(stuff_protocol_handler));
}

TEST_F(ProtocolHandlerRegistryTest, TestEnabledDisabled) {
  registry()->Disable();
  ASSERT_FALSE(registry()->enabled());
  registry()->Enable();
  ASSERT_TRUE(registry()->enabled());
}

TEST_F(ProtocolHandlerRegistryTest,
    DisallowRegisteringExternallyHandledProtocols) {
  delegate()->RegisterExternalHandler("test");
  ASSERT_FALSE(registry()->CanSchemeBeOverridden("test"));
}

TEST_F(ProtocolHandlerRegistryTest, RemovingHandlerMeansItCanBeAddedAgain) {
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->CanSchemeBeOverridden("test"));
  registry()->RemoveHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->CanSchemeBeOverridden("test"));
}

TEST_F(ProtocolHandlerRegistryTest, TestStartsAsDefault) {
  registry()->OnAcceptRegisterProtocolHandler(test_protocol_handler());
  ASSERT_TRUE(registry()->IsDefault(test_protocol_handler()));
}

TEST_F(ProtocolHandlerRegistryTest, TestClearDefault) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->ClearDefault("test");
  ASSERT_FALSE(registry()->IsDefault(ph1));
  ASSERT_FALSE(registry()->IsDefault(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, TestGetHandlerFor) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);

  registry()->OnAcceptRegisterProtocolHandler(ph2);
  ASSERT_EQ(ph2, registry()->GetHandlerFor("test"));
  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, TestMostRecentHandlerIsDefault) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);
  ASSERT_FALSE(registry()->IsDefault(ph1));
  ASSERT_TRUE(registry()->IsDefault(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, TestOnAcceptRegisterProtocolHandler) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(registry()->IsDefault(ph1));
  ASSERT_FALSE(registry()->IsDefault(ph2));

  registry()->OnAcceptRegisterProtocolHandler(ph2);
  ASSERT_FALSE(registry()->IsDefault(ph1));
  ASSERT_TRUE(registry()->IsDefault(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, TestDefaultSaveLoad) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnDenyRegisterProtocolHandler(ph1);
  registry()->OnDenyRegisterProtocolHandler(ph2);

  registry()->OnAcceptRegisterProtocolHandler(ph2);
  registry()->Disable();

  RecreateRegistry(true);

  ASSERT_FALSE(registry()->enabled());
  registry()->Enable();
  ASSERT_FALSE(registry()->IsDefault(ph1));
  ASSERT_TRUE(registry()->IsDefault(ph2));

  RecreateRegistry(true);
  ASSERT_TRUE(registry()->enabled());
}

TEST_F(ProtocolHandlerRegistryTest, TestRemoveHandler) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph1);

  registry()->RemoveHandler(ph1);
  ASSERT_FALSE(registry()->IsRegistered(ph1));
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, TestIsRegistered) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);

  ASSERT_TRUE(registry()->IsRegistered(ph1));
}

TEST_F(ProtocolHandlerRegistryTest, TestIsEquivalentRegistered) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", GURL("http://test/%s"));
  ProtocolHandler ph2 = CreateProtocolHandler("test", GURL("http://test/%s"));
  registry()->OnAcceptRegisterProtocolHandler(ph1);

  ASSERT_TRUE(registry()->IsRegistered(ph1));
  ASSERT_TRUE(registry()->HasRegisteredEquivalent(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, TestSilentlyRegisterHandler) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", GURL("http://test/1/%s"));
  ProtocolHandler ph2 = CreateProtocolHandler("test", GURL("http://test/2/%s"));
  ProtocolHandler ph3 = CreateProtocolHandler("ignore", GURL("http://test/%s"));
  ProtocolHandler ph4 = CreateProtocolHandler("ignore", GURL("http://test/%s"));

  ASSERT_FALSE(registry()->SilentlyHandleRegisterHandlerRequest(ph1));
  ASSERT_FALSE(registry()->IsRegistered(ph1));

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(registry()->IsRegistered(ph1));

  ASSERT_TRUE(registry()->SilentlyHandleRegisterHandlerRequest(ph2));
  ASSERT_FALSE(registry()->IsRegistered(ph1));
  ASSERT_TRUE(registry()->IsRegistered(ph2));

  ASSERT_FALSE(registry()->SilentlyHandleRegisterHandlerRequest(ph3));
  ASSERT_FALSE(registry()->IsRegistered(ph3));

  registry()->OnIgnoreRegisterProtocolHandler(ph3);
  ASSERT_FALSE(registry()->IsRegistered(ph3));
  ASSERT_TRUE(registry()->IsIgnored(ph3));

  ASSERT_TRUE(registry()->SilentlyHandleRegisterHandlerRequest(ph4));
  ASSERT_FALSE(registry()->IsRegistered(ph4));
  ASSERT_TRUE(registry()->HasIgnoredEquivalent(ph4));
}

TEST_F(ProtocolHandlerRegistryTest, TestRemoveHandlerRemovesDefault) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  ProtocolHandler ph3 = CreateProtocolHandler("test", "test3");

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);
  registry()->OnAcceptRegisterProtocolHandler(ph3);

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->RemoveHandler(ph1);
  ASSERT_FALSE(registry()->IsDefault(ph1));
}

TEST_F(ProtocolHandlerRegistryTest, TestGetHandlersFor) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");
  ProtocolHandler ph3 = CreateProtocolHandler("test", "test3");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);
  registry()->OnAcceptRegisterProtocolHandler(ph3);

  ProtocolHandlerRegistry::ProtocolHandlerList handlers =
      registry()->GetHandlersFor("test");
  ASSERT_EQ(static_cast<size_t>(3), handlers.size());

  ASSERT_EQ(ph3, handlers[0]);
  ASSERT_EQ(ph2, handlers[1]);
  ASSERT_EQ(ph1, handlers[2]);
}

TEST_F(ProtocolHandlerRegistryTest, TestGetRegisteredProtocols) {
  std::vector<std::string> protocols;
  registry()->GetRegisteredProtocols(&protocols);
  ASSERT_EQ(static_cast<size_t>(0), protocols.size());

  registry()->GetHandlersFor("test");

  protocols.clear();
  registry()->GetRegisteredProtocols(&protocols);
  ASSERT_EQ(static_cast<size_t>(0), protocols.size());
}

TEST_F(ProtocolHandlerRegistryTest, TestIsHandledProtocol) {
  registry()->GetHandlersFor("test");
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, TestNotifications) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  NotificationCounter counter(profile());

  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(counter.notified());
  counter.Clear();

  registry()->Disable();
  ASSERT_TRUE(counter.notified());
  counter.Clear();

  registry()->Enable();
  ASSERT_TRUE(counter.notified());
  counter.Clear();

  registry()->RemoveHandler(ph1);
  ASSERT_TRUE(counter.notified());
  counter.Clear();
}

TEST_F(ProtocolHandlerRegistryTest, TestReentrantNotifications) {
  QueryProtocolHandlerOnChange queryer(profile(), registry());
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(queryer.called_);
}

TEST_F(ProtocolHandlerRegistryTest, TestProtocolsWithNoDefaultAreHandled) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->ClearDefault("test");
  std::vector<std::string> handled_protocols;
  registry()->GetRegisteredProtocols(&handled_protocols);
  ASSERT_EQ(static_cast<size_t>(1), handled_protocols.size());
  ASSERT_EQ("test", handled_protocols[0]);
}

TEST_F(ProtocolHandlerRegistryTest, TestDisablePreventsHandling) {
  ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(registry()->IsHandledProtocol("test"));
  registry()->Disable();
  ASSERT_FALSE(registry()->IsHandledProtocol("test"));
}

TEST_F(ProtocolHandlerRegistryTest, TestOSRegistration) {
  ProtocolHandler ph_do1 = CreateProtocolHandler("do", "test1");
  ProtocolHandler ph_do2 = CreateProtocolHandler("do", "test2");
  ProtocolHandler ph_dont = CreateProtocolHandler("dont", "test");

  ASSERT_FALSE(delegate()->IsFakeRegisteredWithOS("do"));
  ASSERT_FALSE(delegate()->IsFakeRegisteredWithOS("dont"));

  registry()->OnAcceptRegisterProtocolHandler(ph_do1);
  registry()->OnDenyRegisterProtocolHandler(ph_dont);
  base::RunLoop().RunUntilIdle();

  ASSERT_TRUE(delegate()->IsFakeRegisteredWithOS("do"));
  ASSERT_FALSE(delegate()->IsFakeRegisteredWithOS("dont"));

  // This should not register with the OS, if it does the delegate
  // will assert for us. We don't need to wait for the message loop
  // as it should not go through to the shell worker.
  registry()->OnAcceptRegisterProtocolHandler(ph_do2);
}

#if defined(OS_LINUX)
// TODO(benwells): When Linux support is more reliable and
// http://crbug.com/88255 is fixed this test will pass.
#define MAYBE_TestOSRegistrationFailure DISABLED_TestOSRegistrationFailure
#else
#define MAYBE_TestOSRegistrationFailure TestOSRegistrationFailure
#endif

TEST_F(ProtocolHandlerRegistryTest, MAYBE_TestOSRegistrationFailure) {
  ProtocolHandler ph_do = CreateProtocolHandler("do", "test1");
  ProtocolHandler ph_dont = CreateProtocolHandler("dont", "test");

  ASSERT_FALSE(registry()->IsHandledProtocol("do"));
  ASSERT_FALSE(registry()->IsHandledProtocol("dont"));

  registry()->OnAcceptRegisterProtocolHandler(ph_do);
  base::RunLoop().RunUntilIdle();

  delegate()->set_force_os_failure(true);
  registry()->OnAcceptRegisterProtocolHandler(ph_dont);
  base::RunLoop().RunUntilIdle();

  ASSERT_TRUE(registry()->IsHandledProtocol("do"));
  ASSERT_EQ(static_cast<size_t>(1), registry()->GetHandlersFor("do").size());
  ASSERT_FALSE(registry()->IsHandledProtocol("dont"));
  ASSERT_EQ(static_cast<size_t>(1), registry()->GetHandlersFor("dont").size());
}

TEST_F(ProtocolHandlerRegistryTest, TestMaybeCreateTaskWorksFromIOThread) {
  ProtocolHandler ph1 = CreateProtocolHandler("mailto", "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  GURL url("mailto:someone@something.com");

  std::unique_ptr<net::URLRequestJobFactory> interceptor(
      registry()->CreateJobInterceptorFactory());
  AssertIntercepted(url, interceptor.get());
}

TEST_F(ProtocolHandlerRegistryTest,
       TestIsHandledProtocolWorksOnIOThread) {
  std::string scheme("mailto");
  ProtocolHandler ph1 = CreateProtocolHandler(scheme, "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);

  std::unique_ptr<ProtocolHandlerRegistry::JobInterceptorFactory> interceptor(
      registry()->CreateJobInterceptorFactory());
  AssertWillHandle(scheme, true, interceptor.get());
}

TEST_F(ProtocolHandlerRegistryTest, TestRemovingDefaultFallsBackToOldDefault) {
  ProtocolHandler ph1 = CreateProtocolHandler("mailto", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("mailto", "test2");
  ProtocolHandler ph3 = CreateProtocolHandler("mailto", "test3");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);
  registry()->OnAcceptRegisterProtocolHandler(ph3);

  ASSERT_TRUE(registry()->IsDefault(ph3));
  registry()->RemoveHandler(ph3);
  ASSERT_TRUE(registry()->IsDefault(ph2));
  registry()->OnAcceptRegisterProtocolHandler(ph3);
  ASSERT_TRUE(registry()->IsDefault(ph3));
  registry()->RemoveHandler(ph2);
  ASSERT_TRUE(registry()->IsDefault(ph3));
  registry()->RemoveHandler(ph3);
  ASSERT_TRUE(registry()->IsDefault(ph1));
}

TEST_F(ProtocolHandlerRegistryTest, TestRemovingDefaultDoesntChangeHandlers) {
  ProtocolHandler ph1 = CreateProtocolHandler("mailto", "test1");
  ProtocolHandler ph2 = CreateProtocolHandler("mailto", "test2");
  ProtocolHandler ph3 = CreateProtocolHandler("mailto", "test3");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);
  registry()->OnAcceptRegisterProtocolHandler(ph3);
  registry()->RemoveHandler(ph3);

  ProtocolHandlerRegistry::ProtocolHandlerList handlers =
      registry()->GetHandlersFor("mailto");
  ASSERT_EQ(static_cast<size_t>(2), handlers.size());

  ASSERT_EQ(ph2, handlers[0]);
  ASSERT_EQ(ph1, handlers[1]);
}

TEST_F(ProtocolHandlerRegistryTest, TestClearDefaultGetsPropagatedToIO) {
  std::string scheme("mailto");
  ProtocolHandler ph1 = CreateProtocolHandler(scheme, "test1");
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->ClearDefault(scheme);

  std::unique_ptr<ProtocolHandlerRegistry::JobInterceptorFactory> interceptor(
      registry()->CreateJobInterceptorFactory());
  AssertWillHandle(scheme, false, interceptor.get());
}

TEST_F(ProtocolHandlerRegistryTest, TestLoadEnabledGetsPropogatedToIO) {
  std::string mailto("mailto");
  ProtocolHandler ph1 = CreateProtocolHandler(mailto, "MailtoHandler");
  registry()->OnAcceptRegisterProtocolHandler(ph1);

  std::unique_ptr<ProtocolHandlerRegistry::JobInterceptorFactory> interceptor(
      registry()->CreateJobInterceptorFactory());
  AssertWillHandle(mailto, true, interceptor.get());
  registry()->Disable();
  AssertWillHandle(mailto, false, interceptor.get());
}

TEST_F(ProtocolHandlerRegistryTest, TestReplaceHandler) {
  ProtocolHandler ph1 =
      CreateProtocolHandler("mailto", GURL("http://test.com/%s"));
  ProtocolHandler ph2 =
      CreateProtocolHandler("mailto", GURL("http://test.com/updated-url/%s"));
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  ASSERT_TRUE(registry()->AttemptReplace(ph2));
  const ProtocolHandler& handler(registry()->GetHandlerFor("mailto"));
  ASSERT_EQ(handler.url(), ph2.url());
}

TEST_F(ProtocolHandlerRegistryTest, TestReplaceNonDefaultHandler) {
  ProtocolHandler ph1 =
      CreateProtocolHandler("mailto", GURL("http://test.com/%s"));
  ProtocolHandler ph2 =
      CreateProtocolHandler("mailto", GURL("http://test.com/updated-url/%s"));
  ProtocolHandler ph3 =
      CreateProtocolHandler("mailto", GURL("http://else.com/%s"));
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph3);
  ASSERT_TRUE(registry()->AttemptReplace(ph2));
  const ProtocolHandler& handler(registry()->GetHandlerFor("mailto"));
  ASSERT_EQ(handler.url(), ph3.url());
}

TEST_F(ProtocolHandlerRegistryTest, TestReplaceRemovesStaleHandlers) {
  ProtocolHandler ph1 =
      CreateProtocolHandler("mailto", GURL("http://test.com/%s"));
  ProtocolHandler ph2 =
      CreateProtocolHandler("mailto", GURL("http://test.com/updated-url/%s"));
  ProtocolHandler ph3 =
      CreateProtocolHandler("mailto", GURL("http://test.com/third/%s"));
  registry()->OnAcceptRegisterProtocolHandler(ph1);
  registry()->OnAcceptRegisterProtocolHandler(ph2);

  // This should replace the previous two handlers.
  ASSERT_TRUE(registry()->AttemptReplace(ph3));
  const ProtocolHandler& handler(registry()->GetHandlerFor("mailto"));
  ASSERT_EQ(handler.url(), ph3.url());
  registry()->RemoveHandler(ph3);
  ASSERT_TRUE(registry()->GetHandlerFor("mailto").IsEmpty());
}

TEST_F(ProtocolHandlerRegistryTest, TestIsSameOrigin) {
  ProtocolHandler ph1 =
      CreateProtocolHandler("mailto", GURL("http://test.com/%s"));
  ProtocolHandler ph2 =
      CreateProtocolHandler("mailto", GURL("http://test.com/updated-url/%s"));
  ProtocolHandler ph3 =
      CreateProtocolHandler("mailto", GURL("http://other.com/%s"));
  ASSERT_EQ(ph1.url().GetOrigin() == ph2.url().GetOrigin(),
      ph1.IsSameOrigin(ph2));
  ASSERT_EQ(ph1.url().GetOrigin() == ph2.url().GetOrigin(),
      ph2.IsSameOrigin(ph1));
  ASSERT_EQ(ph2.url().GetOrigin() == ph3.url().GetOrigin(),
      ph2.IsSameOrigin(ph3));
  ASSERT_EQ(ph3.url().GetOrigin() == ph2.url().GetOrigin(),
      ph3.IsSameOrigin(ph2));
}

TEST_F(ProtocolHandlerRegistryTest, TestInstallDefaultHandler) {
  RecreateRegistry(false);
  registry()->AddPredefinedHandler(
      CreateProtocolHandler("test", GURL("http://test.com/%s")));
  registry()->InitProtocolSettings();
  std::vector<std::string> protocols;
  registry()->GetRegisteredProtocols(&protocols);
  ASSERT_EQ(static_cast<size_t>(1), protocols.size());
}

#define URL_p1u1 "http://p1u1.com/%s"
#define URL_p1u2 "http://p1u2.com/%s"
#define URL_p1u3 "http://p1u3.com/%s"
#define URL_p2u1 "http://p2u1.com/%s"
#define URL_p2u2 "http://p2u2.com/%s"
#define URL_p3u1 "http://p3u1.com/%s"

TEST_F(ProtocolHandlerRegistryTest, TestPrefPolicyOverlapRegister) {
  base::ListValue handlers_registered_by_pref;
  base::ListValue handlers_registered_by_policy;

  handlers_registered_by_pref.Append(
      GetProtocolHandlerValueWithDefault("p1", URL_p1u2, true));
  handlers_registered_by_pref.Append(
      GetProtocolHandlerValueWithDefault("p1", URL_p1u1, true));
  handlers_registered_by_pref.Append(
      GetProtocolHandlerValueWithDefault("p1", URL_p1u2, false));

  handlers_registered_by_policy.Append(
      GetProtocolHandlerValueWithDefault("p1", URL_p1u1, false));
  handlers_registered_by_policy.Append(
      GetProtocolHandlerValueWithDefault("p3", URL_p3u1, true));

  profile()->GetPrefs()->Set(prefs::kRegisteredProtocolHandlers,
                             handlers_registered_by_pref);
  profile()->GetPrefs()->Set(prefs::kPolicyRegisteredProtocolHandlers,
                             handlers_registered_by_policy);
  registry()->InitProtocolSettings();

  // Duplicate p1u2 eliminated in memory but not yet saved in pref
  ProtocolHandler p1u1 = CreateProtocolHandler("p1", GURL(URL_p1u1));
  ProtocolHandler p1u2 = CreateProtocolHandler("p1", GURL(URL_p1u2));
  ASSERT_EQ(InPrefHandlerCount(), 3);
  ASSERT_EQ(InMemoryHandlerCount(), 3);
  ASSERT_TRUE(registry()->IsDefault(p1u1));
  ASSERT_FALSE(registry()->IsDefault(p1u2));

  ProtocolHandler p2u1 = CreateProtocolHandler("p2", GURL(URL_p2u1));
  registry()->OnDenyRegisterProtocolHandler(p2u1);

  // Duplicate p1u2 saved in pref and a new handler added to pref and memory
  ASSERT_EQ(InPrefHandlerCount(), 3);
  ASSERT_EQ(InMemoryHandlerCount(), 4);
  ASSERT_FALSE(registry()->IsDefault(p2u1));

  registry()->RemoveHandler(p1u1);

  // p1u1 removed from user pref but not from memory due to policy.
  ASSERT_EQ(InPrefHandlerCount(), 2);
  ASSERT_EQ(InMemoryHandlerCount(), 4);
  ASSERT_TRUE(registry()->IsDefault(p1u1));

  ProtocolHandler p3u1 = CreateProtocolHandler("p3", GURL(URL_p3u1));
  registry()->RemoveHandler(p3u1);

  // p3u1 not removed from memory due to policy and it was never in pref.
  ASSERT_EQ(InPrefHandlerCount(), 2);
  ASSERT_EQ(InMemoryHandlerCount(), 4);
  ASSERT_TRUE(registry()->IsDefault(p3u1));

  registry()->RemoveHandler(p1u2);

  // p1u2 removed from user pref and memory.
  ASSERT_EQ(InPrefHandlerCount(), 1);
  ASSERT_EQ(InMemoryHandlerCount(), 3);
  ASSERT_TRUE(registry()->IsDefault(p1u1));

  ProtocolHandler p1u3 = CreateProtocolHandler("p1", GURL(URL_p1u3));
  registry()->OnAcceptRegisterProtocolHandler(p1u3);

  // p1u3 added to pref and memory.
  ASSERT_EQ(InPrefHandlerCount(), 2);
  ASSERT_EQ(InMemoryHandlerCount(), 4);
  ASSERT_FALSE(registry()->IsDefault(p1u1));
  ASSERT_TRUE(registry()->IsDefault(p1u3));

  registry()->RemoveHandler(p1u3);

  // p1u3 the default handler for p1 removed from user pref and memory.
  ASSERT_EQ(InPrefHandlerCount(), 1);
  ASSERT_EQ(InMemoryHandlerCount(), 3);
  ASSERT_FALSE(registry()->IsDefault(p1u3));
  ASSERT_TRUE(registry()->IsDefault(p1u1));
  ASSERT_TRUE(registry()->IsDefault(p3u1));
  ASSERT_FALSE(registry()->IsDefault(p2u1));
}

TEST_F(ProtocolHandlerRegistryTest, TestPrefPolicyOverlapIgnore) {
  base::ListValue handlers_ignored_by_pref;
  base::ListValue handlers_ignored_by_policy;

  handlers_ignored_by_pref.Append(GetProtocolHandlerValue("p1", URL_p1u1));
  handlers_ignored_by_pref.Append(GetProtocolHandlerValue("p1", URL_p1u2));
  handlers_ignored_by_pref.Append(GetProtocolHandlerValue("p1", URL_p1u2));
  handlers_ignored_by_pref.Append(GetProtocolHandlerValue("p3", URL_p3u1));

  handlers_ignored_by_policy.Append(GetProtocolHandlerValue("p1", URL_p1u2));
  handlers_ignored_by_policy.Append(GetProtocolHandlerValue("p1", URL_p1u3));
  handlers_ignored_by_policy.Append(GetProtocolHandlerValue("p2", URL_p2u1));

  profile()->GetPrefs()->Set(prefs::kIgnoredProtocolHandlers,
                             handlers_ignored_by_pref);
  profile()->GetPrefs()->Set(prefs::kPolicyIgnoredProtocolHandlers,
                             handlers_ignored_by_policy);
  registry()->InitProtocolSettings();

  // Duplicate p1u2 eliminated in memory but not yet saved in pref
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 4);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 5);

  ProtocolHandler p2u2 = CreateProtocolHandler("p2", GURL(URL_p2u2));
  registry()->OnIgnoreRegisterProtocolHandler(p2u2);

  // Duplicate p1u2 eliminated in pref, p2u2 added to pref and memory.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 4);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 6);

  ProtocolHandler p2u1 = CreateProtocolHandler("p2", GURL(URL_p2u1));
  registry()->RemoveIgnoredHandler(p2u1);

  // p2u1 installed by policy so cant be removed.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 4);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 6);

  ProtocolHandler p1u2 = CreateProtocolHandler("p1", GURL(URL_p1u2));
  registry()->RemoveIgnoredHandler(p1u2);

  // p1u2 installed by policy and pref so it is removed from pref and not from
  // memory.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 3);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 6);

  ProtocolHandler p1u1 = CreateProtocolHandler("p1", GURL(URL_p1u1));
  registry()->RemoveIgnoredHandler(p1u1);

  // p1u1 installed by pref so it is removed from pref and memory.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 2);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 5);

  registry()->RemoveIgnoredHandler(p2u2);

  // p2u2 installed by user so it is removed from pref and memory.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 1);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 4);

  registry()->OnIgnoreRegisterProtocolHandler(p2u1);

  // p2u1 installed by user but it is already installed by policy, so it is
  // added to pref.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 2);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 4);

  registry()->RemoveIgnoredHandler(p2u1);

  // p2u1 installed by user and policy, so it is removed from pref alone.
  ASSERT_EQ(InPrefIgnoredHandlerCount(), 1);
  ASSERT_EQ(InMemoryIgnoredHandlerCount(), 4);
}

TEST_F(ProtocolHandlerRegistryTest, TestMultiplePlaceholders) {
  ProtocolHandler ph =
      CreateProtocolHandler("test", GURL("http://example.com/%s/url=%s"));
  registry()->OnAcceptRegisterProtocolHandler(ph);

  GURL translated_url = ph.TranslateUrl(GURL("test:duplicated_placeholders"));

  // When URL contains multiple placeholders, only the first placeholder should
  // be changed to the given URL.
  ASSERT_EQ(translated_url,
            GURL("http://example.com/test%3Aduplicated_placeholders/url=%s"));
}