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// Copyright 2020 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 "util/crypto/random_bytes.h"
#include <algorithm>
#include <utility>
#include "gtest/gtest.h"
namespace openscreen {
namespace {
struct NonZero {
NonZero() = default;
bool operator()(int n) const { return n > 0; }
};
} // namespace
TEST(RandomBytesTest, CanGenerateRandomBytes) {
std::array<uint8_t, 4> bytes;
GenerateRandomBytes(bytes.begin(), bytes.size());
NonZero pred;
ASSERT_TRUE(std::any_of(bytes.begin(), bytes.end(), pred));
}
TEST(RandomBytesTest, CanGenerate16RandomBytes) {
std::array<uint8_t, 16> bytes = GenerateRandomBytes16();
NonZero pred;
ASSERT_TRUE(std::any_of(bytes.begin(), bytes.end(), pred));
}
TEST(RandomBytesTest, KeysAreNotIdentical) {
constexpr int kNumKeys = 100;
constexpr int kKeyLength = 100;
std::array<std::array<uint8_t, kKeyLength>, kNumKeys> keys;
for (int i = 0; i < kNumKeys; ++i) {
GenerateRandomBytes(keys[i].begin(), kKeyLength);
}
std::sort(std::begin(keys), std::end(keys));
ASSERT_TRUE(std::adjacent_find(std::begin(keys), std::end(keys)) ==
std::end(keys));
}
} // namespace openscreen
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