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67 lines
2.1 KiB
67 lines
2.1 KiB
// |
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// Copyright (C) 2014 The Android Open Source Project |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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#include "update_engine/update_manager/real_random_provider.h" |
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#include <gtest/gtest.h> |
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#include <memory> |
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#include "update_engine/update_manager/umtest_utils.h" |
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using std::unique_ptr; |
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namespace chromeos_update_manager { |
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class UmRealRandomProviderTest : public ::testing::Test { |
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protected: |
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void SetUp() override { |
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// The provider initializes correctly. |
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provider_.reset(new RealRandomProvider()); |
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ASSERT_NE(nullptr, provider_.get()); |
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ASSERT_TRUE(provider_->Init()); |
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provider_->var_seed(); |
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} |
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unique_ptr<RealRandomProvider> provider_; |
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}; |
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TEST_F(UmRealRandomProviderTest, InitFinalize) { |
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// The provider initializes all variables with valid objects. |
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EXPECT_NE(nullptr, provider_->var_seed()); |
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} |
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TEST_F(UmRealRandomProviderTest, GetRandomValues) { |
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// Should not return the same random seed repeatedly. |
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unique_ptr<const uint64_t> value( |
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provider_->var_seed()->GetValue(UmTestUtils::DefaultTimeout(), nullptr)); |
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ASSERT_NE(nullptr, value.get()); |
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// Test that at least the returned values are different. This test fails, |
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// by design, once every 2^320 runs. |
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bool is_same_value = true; |
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for (int i = 0; i < 5; i++) { |
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unique_ptr<const uint64_t> other_value( |
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provider_->var_seed()->GetValue(UmTestUtils::DefaultTimeout(), |
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nullptr)); |
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ASSERT_NE(nullptr, other_value.get()); |
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is_same_value = is_same_value && *other_value == *value; |
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} |
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EXPECT_FALSE(is_same_value); |
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} |
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} // namespace chromeos_update_manager
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