Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 1 | // Copyright (c) 2014 The Chromium OS 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 | |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 5 | #include <gtest/gtest.h> |
| 6 | |
Ben Chan | 02f7c1d | 2014-10-18 15:18:02 -0700 | [diff] [blame] | 7 | #include <memory> |
| 8 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 9 | #include "update_engine/update_manager/real_random_provider.h" |
| 10 | #include "update_engine/update_manager/umtest_utils.h" |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 11 | |
| 12 | using base::TimeDelta; |
Ben Chan | 02f7c1d | 2014-10-18 15:18:02 -0700 | [diff] [blame] | 13 | using std::unique_ptr; |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 14 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 15 | namespace chromeos_update_manager { |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 16 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 17 | class UmRealRandomProviderTest : public ::testing::Test { |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 18 | protected: |
| 19 | virtual void SetUp() { |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 20 | // The provider initializes correctly. |
Gilad Arnold | 0244f46 | 2014-03-14 17:53:59 -0700 | [diff] [blame] | 21 | provider_.reset(new RealRandomProvider()); |
Alex Vakulenko | 88b591f | 2014-08-28 16:48:57 -0700 | [diff] [blame] | 22 | ASSERT_NE(nullptr, provider_.get()); |
Gilad Arnold | 0244f46 | 2014-03-14 17:53:59 -0700 | [diff] [blame] | 23 | ASSERT_TRUE(provider_->Init()); |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 24 | |
Gilad Arnold | 0244f46 | 2014-03-14 17:53:59 -0700 | [diff] [blame] | 25 | provider_->var_seed(); |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 26 | } |
| 27 | |
Ben Chan | 02f7c1d | 2014-10-18 15:18:02 -0700 | [diff] [blame] | 28 | unique_ptr<RealRandomProvider> provider_; |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 29 | }; |
| 30 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 31 | TEST_F(UmRealRandomProviderTest, InitFinalize) { |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 32 | // The provider initializes all variables with valid objects. |
Alex Vakulenko | 88b591f | 2014-08-28 16:48:57 -0700 | [diff] [blame] | 33 | EXPECT_NE(nullptr, provider_->var_seed()); |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 34 | } |
| 35 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 36 | TEST_F(UmRealRandomProviderTest, GetRandomValues) { |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 37 | // Should not return the same random seed repeatedly. |
Ben Chan | 02f7c1d | 2014-10-18 15:18:02 -0700 | [diff] [blame] | 38 | unique_ptr<const uint64_t> value( |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 39 | provider_->var_seed()->GetValue(UmTestUtils::DefaultTimeout(), nullptr)); |
Alex Vakulenko | 88b591f | 2014-08-28 16:48:57 -0700 | [diff] [blame] | 40 | ASSERT_NE(nullptr, value.get()); |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 41 | |
| 42 | // Test that at least the returned values are different. This test fails, |
| 43 | // by design, once every 2^320 runs. |
| 44 | bool is_same_value = true; |
| 45 | for (int i = 0; i < 5; i++) { |
Ben Chan | 02f7c1d | 2014-10-18 15:18:02 -0700 | [diff] [blame] | 46 | unique_ptr<const uint64_t> other_value( |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 47 | provider_->var_seed()->GetValue(UmTestUtils::DefaultTimeout(), |
Gilad Arnold | 67ed78d | 2014-04-23 13:17:46 -0700 | [diff] [blame] | 48 | nullptr)); |
Alex Vakulenko | 88b591f | 2014-08-28 16:48:57 -0700 | [diff] [blame] | 49 | ASSERT_NE(nullptr, other_value.get()); |
Alex Deymo | bb019fe | 2014-02-03 20:12:17 -0800 | [diff] [blame] | 50 | is_same_value = is_same_value && *other_value == *value; |
| 51 | } |
| 52 | EXPECT_FALSE(is_same_value); |
| 53 | } |
| 54 | |
Alex Deymo | 63784a5 | 2014-05-28 10:46:14 -0700 | [diff] [blame] | 55 | } // namespace chromeos_update_manager |