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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "crypto/random.h"
- #include <stddef.h>
- #include <string>
- #include "base/strings/string_util.h"
- #include "testing/gtest/include/gtest/gtest.h"
- // Basic functionality tests. Does NOT test the security of the random data.
- // Ensures we don't have all trivial data, i.e. that the data is indeed random.
- // Currently, that means the bytes cannot be all the same (e.g. all zeros).
- bool IsTrivial(const std::string& bytes) {
- for (size_t i = 0; i < bytes.size(); i++) {
- if (bytes[i] != bytes[0]) {
- return false;
- }
- }
- return true;
- }
- TEST(RandBytes, RandBytes) {
- std::string bytes(16, '\0');
- crypto::RandBytes(base::WriteInto(&bytes, bytes.size()), bytes.size());
- EXPECT_TRUE(!IsTrivial(bytes));
- }
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