Fix chromeos::ProxyConfigService starting with the wrong ProxyConfig.

chromeos/network/proxy/proxy_config_service_impl_unittest.cc

+// Copyright 2017 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 "chromeos/network/proxy/proxy_config_service_impl.h"
+
+#include <memory>
+
+#include "base/memory/ptr_util.h"
+#include "base/test/scoped_task_environment.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "base/values.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/network/network_handler.h"
+#include "chromeos/network/network_state_test.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/testing_pref_service.h"
+#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
+#include "components/proxy_config/proxy_config_pref_names.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+namespace {
+
+const char kFixedPacUrl[] = "http://fixed/";
+

[stevenjb, 2017/06/21 19:38:02]

I don't think we usually put the entire test suite in an anon namespace?

[mmenke, 2017/06/21 19:44:18]

In net/ we often do, but I don't have strong feelings about it.  I've reduced
the scope of the namespace to end just above the test fixture class.

+// Testing proxy config service that allows us to fire notifications at will.
+class TestProxyConfigService : public net::ProxyConfigService {
+ public:
+  TestProxyConfigService(const net::ProxyConfig& config,
+                         ConfigAvailability availability)
+      : config_(config), availability_(availability) {}
+
+ private:
+  void AddObserver(net::ProxyConfigService::Observer* observer) override {}
+

[stevenjb, 2017/06/21 19:38:02]

nit: no blank line here

[mmenke, 2017/06/21 19:44:18]

Done.

+  void RemoveObserver(net::ProxyConfigService::Observer* observer) override {}
+
+  net::ProxyConfigService::ConfigAvailability GetLatestProxyConfig(
+      net::ProxyConfig* config) override {
+    *config = config_;
+    return availability_;
+  }
+
+  net::ProxyConfig config_;
+  ConfigAvailability availability_;
+};
+
+class ProxyConfigServiceImplTest : public NetworkStateTest {
+  void SetUp() override {
+    DBusThreadManager::Initialize();
+    chromeos::NetworkHandler::Initialize();
+    NetworkStateTest::SetUp();
+  }
+
+  void TearDown() override {
+    NetworkStateTest::TearDown();
+    chromeos::NetworkHandler::Shutdown();
+    DBusThreadManager::Shutdown();
+  }
+
+ protected:
+  base::test::ScopedTaskEnvironment environment_;
+};
+
+// By default, ProxyConfigServiceImpl should ignore the state of the nested
+// ProxyConfigService.
+TEST_F(ProxyConfigServiceImplTest, IgnoresNestedProxyConfigServiceByDefault) {
+  TestingPrefServiceSimple profile_prefs;
+  PrefProxyConfigTrackerImpl::RegisterProfilePrefs(profile_prefs.registry());
+  TestingPrefServiceSimple local_state_prefs;
+
+  net::ProxyConfig fixed_config;
+  fixed_config.set_pac_url(GURL(kFixedPacUrl));
+  std::unique_ptr<TestProxyConfigService> nested_service =
+      base::MakeUnique<TestProxyConfigService>(
+          fixed_config, net::ProxyConfigService::CONFIG_VALID);
+
+  ProxyConfigServiceImpl proxy_tracker(&profile_prefs, &local_state_prefs,
+                                       base::ThreadTaskRunnerHandle::Get());
+
+  std::unique_ptr<net::ProxyConfigService> proxy_service =
+      proxy_tracker.CreateTrackingProxyConfigService(std::move(nested_service));
+
+  net::ProxyConfig config;
+  EXPECT_EQ(net::ProxyConfigService::CONFIG_VALID,
+            proxy_service->GetLatestProxyConfig(&config));
+  EXPECT_TRUE(config.Equals(net::ProxyConfig::CreateDirect()));
+
+  environment_.RunUntilIdle();
+  EXPECT_EQ(net::ProxyConfigService::CONFIG_VALID,
+            proxy_service->GetLatestProxyConfig(&config));
+  EXPECT_TRUE(config.Equals(net::ProxyConfig::CreateDirect()));
+
+  proxy_tracker.DetachFromPrefService();
+}
+
+// Sets proxy_config::prefs::kUseSharedProxies to true, and makes sure the
+// nested ProxyConfigService is used.
+TEST_F(ProxyConfigServiceImplTest, UsesNestedProxyConfigService) {
+  TestingPrefServiceSimple profile_prefs;
+  PrefProxyConfigTrackerImpl::RegisterProfilePrefs(profile_prefs.registry());
+  TestingPrefServiceSimple local_state_prefs;
+  profile_prefs.SetUserPref(proxy_config::prefs::kUseSharedProxies,
+                            base::MakeUnique<base::Value>(true));
+
+  net::ProxyConfig fixed_config;
+  fixed_config.set_pac_url(GURL(kFixedPacUrl));
+  std::unique_ptr<TestProxyConfigService> nested_service =
+      base::MakeUnique<TestProxyConfigService>(
+          fixed_config, net::ProxyConfigService::CONFIG_VALID);
+
+  ProxyConfigServiceImpl proxy_tracker(&profile_prefs, &local_state_prefs,
+                                       base::ThreadTaskRunnerHandle::Get());
+
+  std::unique_ptr<net::ProxyConfigService> proxy_service =
+      proxy_tracker.CreateTrackingProxyConfigService(std::move(nested_service));
+
+  net::ProxyConfig config;
+  EXPECT_EQ(net::ProxyConfigService::CONFIG_VALID,
+            proxy_service->GetLatestProxyConfig(&config));
+  EXPECT_TRUE(config.Equals(fixed_config));
+
+  environment_.RunUntilIdle();
+  EXPECT_EQ(net::ProxyConfigService::CONFIG_VALID,
+            proxy_service->GetLatestProxyConfig(&config));
+  EXPECT_TRUE(config.Equals(fixed_config));
+
+  proxy_tracker.DetachFromPrefService();
+}
+
+}  // namespace
+}  // namespace chromeos