K. Moon | 832a694 | 2022-10-31 20:11:31 +0000 | [diff] [blame] | 1 | // Copyright 2017 The PDFium Authors |
Tom Sepez | e8b3e0c | 2017-09-08 10:18:37 -0700 | [diff] [blame] | 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 "core/fxcrt/fx_random.h" |
| 6 | |
| 7 | #include <array> |
| 8 | #include <set> |
| 9 | |
| 10 | #include "testing/gtest/include/gtest/gtest.h" |
| 11 | |
| 12 | TEST(FX_Random, GenerateMT3600times) { |
| 13 | // Prove this doesn't spin wait for a second each time. |
| 14 | // Since our global seeds are sequential, they wont't collide once |
| 15 | // seeded until 2^32 calls, and if the PNRG is any good, we won't |
| 16 | // get the same sequence from different seeds, esp. with this few |
| 17 | // iterations. |
| 18 | std::set<std::array<uint32_t, 16>> seen; |
| 19 | std::array<uint32_t, 16> current; |
| 20 | for (int i = 0; i < 3600; ++i) { |
| 21 | FX_Random_GenerateMT(current.data(), 16); |
| 22 | EXPECT_TRUE(seen.insert(current).second); |
| 23 | } |
| 24 | } |