| // Copyright 2017 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/fxcrt/fx_random.h" |
| |
| #include <array> |
| #include <set> |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| TEST(FX_Random, GenerateMT3600times) { |
| // Prove this doesn't spin wait for a second each time. |
| // Since our global seeds are sequential, they wont't collide once |
| // seeded until 2^32 calls, and if the PNRG is any good, we won't |
| // get the same sequence from different seeds, esp. with this few |
| // iterations. |
| std::set<std::array<uint32_t, 16>> seen; |
| std::array<uint32_t, 16> current; |
| for (int i = 0; i < 3600; ++i) { |
| FX_Random_GenerateMT(current.data(), 16); |
| EXPECT_TRUE(seen.insert(current).second); |
| } |
| } |