src/components/policy/core/common/async_policy_provider_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/policy/core/common/async_policy_provider.h"
   6
   7 #include "base/callback.h"
   8 #include "base/memory/ref_counted.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/message_loop/message_loop_proxy.h"
  11 #include "base/sequenced_task_runner.h"
  12 #include "base/values.h"
  13 #include "components/policy/core/common/async_policy_loader.h"
  14 #include "components/policy/core/common/external_data_fetcher.h"
  15 #include "components/policy/core/common/mock_configuration_policy_provider.h"
  16 #include "components/policy/core/common/schema_registry.h"
  17 #include "testing/gmock/include/gmock/gmock.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 using testing::Mock;
  21 using testing::Return;
  22 using testing::Sequence;
  23
  24 namespace policy {
  25
  26 namespace {
  27
  28 // Helper to write a policy in |bundle| with less code.
  29 void SetPolicy(PolicyBundle* bundle,
  30                const std::string& name,
  31                const std::string& value) {
  32   bundle->Get(PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))
  33       .Set(name,
  34            POLICY_LEVEL_MANDATORY,
  35            POLICY_SCOPE_USER,
  36            new base::StringValue(value),
  37            NULL);
  38 }
  39
  40 class MockPolicyLoader : public AsyncPolicyLoader {
  41  public:
  42   explicit MockPolicyLoader(
  43       scoped_refptr<base::SequencedTaskRunner> task_runner);
  44   virtual ~MockPolicyLoader();
  45
  46   // Load() returns a scoped_ptr<PolicyBundle> but it can't be mocked because
  47   // scoped_ptr is moveable but not copyable. This override forwards the
  48   // call to MockLoad() which returns a PolicyBundle*, and returns a copy
  49   // wrapped in a passed scoped_ptr.
  50   virtual scoped_ptr<PolicyBundle> Load() override;
  51
  52   MOCK_METHOD0(MockLoad, const PolicyBundle*());
  53   MOCK_METHOD0(InitOnBackgroundThread, void());
  54   MOCK_METHOD0(LastModificationTime, base::Time());
  55
  56  private:
  57   DISALLOW_COPY_AND_ASSIGN(MockPolicyLoader);
  58 };
  59
  60 MockPolicyLoader::MockPolicyLoader(
  61     scoped_refptr<base::SequencedTaskRunner> task_runner)
  62     : AsyncPolicyLoader(task_runner) {}
  63
  64 MockPolicyLoader::~MockPolicyLoader() {}
  65
  66 scoped_ptr<PolicyBundle> MockPolicyLoader::Load() {
  67   scoped_ptr<PolicyBundle> bundle;
  68   const PolicyBundle* loaded = MockLoad();
  69   if (loaded) {
  70     bundle.reset(new PolicyBundle());
  71     bundle->CopyFrom(*loaded);
  72   }
  73   return bundle.Pass();
  74 }
  75
  76 }  // namespace
  77
  78 class AsyncPolicyProviderTest : public testing::Test {
  79  protected:
  80   AsyncPolicyProviderTest();
  81   ~AsyncPolicyProviderTest() override;
  82
  83   void SetUp() override;
  84   void TearDown() override;
  85
  86   base::MessageLoop loop_;
  87   SchemaRegistry schema_registry_;
  88   PolicyBundle initial_bundle_;
  89   MockPolicyLoader* loader_;
  90   scoped_ptr<AsyncPolicyProvider> provider_;
  91
  92  private:
  93   DISALLOW_COPY_AND_ASSIGN(AsyncPolicyProviderTest);
  94 };
  95
  96 AsyncPolicyProviderTest::AsyncPolicyProviderTest() {}
  97
  98 AsyncPolicyProviderTest::~AsyncPolicyProviderTest() {}
  99
 100 void AsyncPolicyProviderTest::SetUp() {
 101   SetPolicy(&initial_bundle_, "policy", "initial");
 102   loader_ = new MockPolicyLoader(loop_.message_loop_proxy());
 103   EXPECT_CALL(*loader_, LastModificationTime())
 104       .WillRepeatedly(Return(base::Time()));
 105   EXPECT_CALL(*loader_, InitOnBackgroundThread()).Times(1);
 106   EXPECT_CALL(*loader_, MockLoad()).WillOnce(Return(&initial_bundle_));
 107
 108   provider_.reset(new AsyncPolicyProvider(
 109       &schema_registry_, scoped_ptr<AsyncPolicyLoader>(loader_)));
 110   provider_->Init(&schema_registry_);
 111   // Verify that the initial load is done synchronously:
 112   EXPECT_TRUE(provider_->policies().Equals(initial_bundle_));
 113
 114   loop_.RunUntilIdle();
 115   Mock::VerifyAndClearExpectations(loader_);
 116
 117   EXPECT_CALL(*loader_, LastModificationTime())
 118       .WillRepeatedly(Return(base::Time()));
 119 }
 120
 121 void AsyncPolicyProviderTest::TearDown() {
 122   if (provider_) {
 123     provider_->Shutdown();
 124     provider_.reset();
 125   }
 126   loop_.RunUntilIdle();
 127 }
 128
 129 TEST_F(AsyncPolicyProviderTest, RefreshPolicies) {
 130   PolicyBundle refreshed_bundle;
 131   SetPolicy(&refreshed_bundle, "policy", "refreshed");
 132   EXPECT_CALL(*loader_, MockLoad()).WillOnce(Return(&refreshed_bundle));
 133
 134   MockConfigurationPolicyObserver observer;
 135   provider_->AddObserver(&observer);
 136   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
 137   provider_->RefreshPolicies();
 138   loop_.RunUntilIdle();
 139   // The refreshed policies are now provided.
 140   EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
 141   provider_->RemoveObserver(&observer);
 142 }
 143
 144 TEST_F(AsyncPolicyProviderTest, RefreshPoliciesTwice) {
 145   PolicyBundle refreshed_bundle;
 146   SetPolicy(&refreshed_bundle, "policy", "refreshed");
 147   EXPECT_CALL(*loader_, MockLoad()).WillRepeatedly(Return(&refreshed_bundle));
 148
 149   MockConfigurationPolicyObserver observer;
 150   provider_->AddObserver(&observer);
 151   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 152   provider_->RefreshPolicies();
 153   // Doesn't refresh before going through the background thread.
 154   Mock::VerifyAndClearExpectations(&observer);
 155
 156   // Doesn't refresh if another RefreshPolicies request is made.
 157   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 158   provider_->RefreshPolicies();
 159   Mock::VerifyAndClearExpectations(&observer);
 160
 161   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
 162   loop_.RunUntilIdle();
 163   // The refreshed policies are now provided.
 164   EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
 165   Mock::VerifyAndClearExpectations(&observer);
 166   provider_->RemoveObserver(&observer);
 167 }
 168
 169 TEST_F(AsyncPolicyProviderTest, RefreshPoliciesDuringReload) {
 170   PolicyBundle reloaded_bundle;
 171   SetPolicy(&reloaded_bundle, "policy", "reloaded");
 172   PolicyBundle refreshed_bundle;
 173   SetPolicy(&refreshed_bundle, "policy", "refreshed");
 174
 175   Sequence load_sequence;
 176   // Reload.
 177   EXPECT_CALL(*loader_, MockLoad()).InSequence(load_sequence)
 178                                    .WillOnce(Return(&reloaded_bundle));
 179   // RefreshPolicies.
 180   EXPECT_CALL(*loader_, MockLoad()).InSequence(load_sequence)
 181                                    .WillOnce(Return(&refreshed_bundle));
 182
 183   MockConfigurationPolicyObserver observer;
 184   provider_->AddObserver(&observer);
 185   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 186
 187   // A Reload is triggered before RefreshPolicies, and it shouldn't trigger
 188   // notifications.
 189   loader_->Reload(true);
 190   Mock::VerifyAndClearExpectations(&observer);
 191
 192   // Doesn't refresh before going through the background thread.
 193   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 194   provider_->RefreshPolicies();
 195   Mock::VerifyAndClearExpectations(&observer);
 196
 197   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
 198   loop_.RunUntilIdle();
 199   // The refreshed policies are now provided, and the |reloaded_bundle| was
 200   // dropped.
 201   EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
 202   Mock::VerifyAndClearExpectations(&observer);
 203   provider_->RemoveObserver(&observer);
 204 }
 205
 206 TEST_F(AsyncPolicyProviderTest, Shutdown) {
 207   EXPECT_CALL(*loader_, MockLoad()).WillRepeatedly(Return(&initial_bundle_));
 208
 209   MockConfigurationPolicyObserver observer;
 210   provider_->AddObserver(&observer);
 211
 212   // Though there is a pending Reload, the provider and the loader can be
 213   // deleted at any time.
 214   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 215   loader_->Reload(true);
 216   Mock::VerifyAndClearExpectations(&observer);
 217
 218   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
 219   provider_->Shutdown();
 220   loop_.RunUntilIdle();
 221   Mock::VerifyAndClearExpectations(&observer);
 222
 223   provider_->RemoveObserver(&observer);
 224   provider_.reset();
 225 }
 226
 227 }  // namespace policy