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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/policy/core/common/async_policy_provider.h"
#include <memory>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/run_loop.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/task_environment.h"
#include "base/values.h"
#include "components/policy/core/common/async_policy_loader.h"
#include "components/policy/core/common/external_data_fetcher.h"
#include "components/policy/core/common/mock_configuration_policy_provider.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/core/common/schema_registry.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::Mock;
using testing::Return;
using testing::Sequence;
namespace policy {
namespace {
// Helper to write a policy in |bundle| with less code.
void SetPolicy(PolicyBundle* bundle,
const std::string& name,
const std::string& value) {
bundle->Get(PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))
.Set(name, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_PLATFORM, base::Value(value), nullptr);
}
class MockPolicyLoader : public AsyncPolicyLoader {
public:
explicit MockPolicyLoader(
scoped_refptr<base::SequencedTaskRunner> task_runner);
MockPolicyLoader(const MockPolicyLoader&) = delete;
MockPolicyLoader& operator=(const MockPolicyLoader&) = delete;
~MockPolicyLoader() override;
// Load() returns a PolicyBundle but it can't be mocked
// because PolicyBundle is moveable but not copyable. This override
// forwards the call to MockLoad() which returns a PolicyBundle*, and returns
// a copy wrapped.
PolicyBundle Load() override;
MOCK_METHOD0(MockLoad, const PolicyBundle*());
MOCK_METHOD0(InitOnBackgroundThread, void());
MOCK_METHOD0(LastModificationTime, base::Time());
};
MockPolicyLoader::MockPolicyLoader(
scoped_refptr<base::SequencedTaskRunner> task_runner)
: AsyncPolicyLoader(task_runner, /*periodic_updates=*/true) {}
MockPolicyLoader::~MockPolicyLoader() = default;
PolicyBundle MockPolicyLoader::Load() {
return MockLoad()->Clone();
}
} // namespace
class AsyncPolicyProviderTest : public testing::Test {
public:
AsyncPolicyProviderTest(const AsyncPolicyProviderTest&) = delete;
AsyncPolicyProviderTest& operator=(const AsyncPolicyProviderTest&) = delete;
protected:
AsyncPolicyProviderTest();
~AsyncPolicyProviderTest() override;
void SetUp() override;
void TearDown() override;
base::test::SingleThreadTaskEnvironment task_environment_;
SchemaRegistry schema_registry_;
PolicyBundle initial_bundle_;
raw_ptr<MockPolicyLoader, AcrossTasksDanglingUntriaged> loader_;
std::unique_ptr<AsyncPolicyProvider> provider_;
};
AsyncPolicyProviderTest::AsyncPolicyProviderTest() = default;
AsyncPolicyProviderTest::~AsyncPolicyProviderTest() = default;
void AsyncPolicyProviderTest::SetUp() {
SetPolicy(&initial_bundle_, "policy", "initial");
loader_ =
new MockPolicyLoader(base::SingleThreadTaskRunner::GetCurrentDefault());
EXPECT_CALL(*loader_, LastModificationTime())
.WillRepeatedly(Return(base::Time()));
EXPECT_CALL(*loader_, InitOnBackgroundThread()).Times(1);
EXPECT_CALL(*loader_, MockLoad()).WillOnce(Return(&initial_bundle_));
provider_ = std::make_unique<AsyncPolicyProvider>(
&schema_registry_, std::unique_ptr<AsyncPolicyLoader>(loader_));
provider_->Init(&schema_registry_);
// Verify that the initial load is done synchronously:
EXPECT_TRUE(provider_->policies().Equals(initial_bundle_));
base::RunLoop().RunUntilIdle();
Mock::VerifyAndClearExpectations(loader_);
EXPECT_CALL(*loader_, LastModificationTime())
.WillRepeatedly(Return(base::Time()));
}
void AsyncPolicyProviderTest::TearDown() {
if (provider_) {
provider_->Shutdown();
provider_.reset();
}
base::RunLoop().RunUntilIdle();
}
TEST_F(AsyncPolicyProviderTest, RefreshPolicies) {
PolicyBundle refreshed_bundle;
SetPolicy(&refreshed_bundle, "policy", "refreshed");
EXPECT_CALL(*loader_, MockLoad()).WillOnce(Return(&refreshed_bundle));
MockConfigurationPolicyObserver observer;
provider_->AddObserver(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
provider_->RefreshPolicies(PolicyFetchReason::kTest);
base::RunLoop().RunUntilIdle();
// The refreshed policies are now provided.
EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
provider_->RemoveObserver(&observer);
}
TEST_F(AsyncPolicyProviderTest, RefreshPoliciesTwice) {
PolicyBundle refreshed_bundle;
SetPolicy(&refreshed_bundle, "policy", "refreshed");
EXPECT_CALL(*loader_, MockLoad()).WillRepeatedly(Return(&refreshed_bundle));
MockConfigurationPolicyObserver observer;
provider_->AddObserver(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
provider_->RefreshPolicies(PolicyFetchReason::kTest);
// Doesn't refresh before going through the background thread.
Mock::VerifyAndClearExpectations(&observer);
// Doesn't refresh if another RefreshPolicies request is made.
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
provider_->RefreshPolicies(PolicyFetchReason::kTest);
Mock::VerifyAndClearExpectations(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
base::RunLoop().RunUntilIdle();
// The refreshed policies are now provided.
EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
Mock::VerifyAndClearExpectations(&observer);
provider_->RemoveObserver(&observer);
}
TEST_F(AsyncPolicyProviderTest, RefreshPoliciesDuringReload) {
PolicyBundle reloaded_bundle;
SetPolicy(&reloaded_bundle, "policy", "reloaded");
PolicyBundle refreshed_bundle;
SetPolicy(&refreshed_bundle, "policy", "refreshed");
Sequence load_sequence;
// Reload.
EXPECT_CALL(*loader_, MockLoad()).InSequence(load_sequence)
.WillOnce(Return(&reloaded_bundle));
// RefreshPolicies.
EXPECT_CALL(*loader_, MockLoad()).InSequence(load_sequence)
.WillOnce(Return(&refreshed_bundle));
MockConfigurationPolicyObserver observer;
provider_->AddObserver(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
// A Reload is triggered before RefreshPolicies, and it shouldn't trigger
// notifications.
loader_->Reload(true);
Mock::VerifyAndClearExpectations(&observer);
// Doesn't refresh before going through the background thread.
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
provider_->RefreshPolicies(PolicyFetchReason::kTest);
Mock::VerifyAndClearExpectations(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(1);
base::RunLoop().RunUntilIdle();
// The refreshed policies are now provided, and the |reloaded_bundle| was
// dropped.
EXPECT_TRUE(provider_->policies().Equals(refreshed_bundle));
Mock::VerifyAndClearExpectations(&observer);
provider_->RemoveObserver(&observer);
}
TEST_F(AsyncPolicyProviderTest, Shutdown) {
EXPECT_CALL(*loader_, MockLoad()).WillRepeatedly(Return(&initial_bundle_));
MockConfigurationPolicyObserver observer;
provider_->AddObserver(&observer);
// Though there is a pending Reload, the provider and the loader can be
// deleted at any time.
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
loader_->Reload(true);
Mock::VerifyAndClearExpectations(&observer);
EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
provider_->Shutdown();
base::RunLoop().RunUntilIdle();
Mock::VerifyAndClearExpectations(&observer);
provider_->RemoveObserver(&observer);
provider_.reset();
}
} // namespace policy
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