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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/crypto_random.h"
#include <string.h>
#include <cstdint>
#include <cstring>
#include <memory>
#include <string>
#include <utility>
#include "rtc_base/buffer.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
using ::testing::_;
using ::testing::DoAll;
using ::testing::Invoke;
using ::testing::IsEmpty;
using ::testing::Not;
using ::testing::Return;
using ::testing::WithArg;
using ::testing::WithArgs;
TEST(RandomTest, TestCreateRandomId) {
CreateRandomId();
}
TEST(RandomTest, TestCreateRandomDouble) {
for (int i = 0; i < 100; ++i) {
double r = CreateRandomDouble();
EXPECT_GE(r, 0.0);
EXPECT_LT(r, 1.0);
}
}
TEST(RandomTest, TestCreateNonZeroRandomId) {
EXPECT_NE(0U, CreateRandomNonZeroId());
}
TEST(RandomTest, TestCreateRandomString) {
std::string random = CreateRandomString(256);
EXPECT_EQ(256U, random.size());
std::string random2;
EXPECT_TRUE(CreateRandomString(256, &random2));
EXPECT_NE(random, random2);
EXPECT_EQ(256U, random2.size());
}
TEST(RandomTest, TestCreateRandomData) {
static size_t kRandomDataLength = 32;
std::string random1;
std::string random2;
EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random1));
EXPECT_EQ(kRandomDataLength, random1.size());
EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random2));
EXPECT_EQ(kRandomDataLength, random2.size());
EXPECT_NE(0, memcmp(random1.data(), random2.data(), kRandomDataLength));
}
TEST(RandomTest, TestCreateRandomStringEvenlyDivideTable) {
static std::string kUnbiasedTable("01234567");
std::string random;
EXPECT_TRUE(CreateRandomString(256, kUnbiasedTable, &random));
EXPECT_EQ(256U, random.size());
static std::string kBiasedTable("0123456789");
EXPECT_FALSE(CreateRandomString(256, kBiasedTable, &random));
EXPECT_EQ(0U, random.size());
}
TEST(RandomTest, TestCreateRandomUuid) {
std::string random = CreateRandomUuid();
EXPECT_EQ(36U, random.size());
}
TEST(RandomTest, TestCreateRandomForTest) {
// Make sure we get the output we expect.
SetRandomTestMode(true);
EXPECT_EQ(2154761789U, CreateRandomId());
EXPECT_EQ("h0ISP4S5SJKH/9EY", CreateRandomString(16));
EXPECT_EQ("41706e92-cdd3-46d9-a22d-8ff1737ffb11", CreateRandomUuid());
static size_t kRandomDataLength = 32;
std::string random;
EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random));
EXPECT_EQ(kRandomDataLength, random.size());
Buffer expected(
"\xbd\x52\x2a\x4b\x97\x93\x2f\x1c"
"\xc4\x72\xab\xa2\x88\x68\x3e\xcc"
"\xa3\x8d\xaf\x13\x3b\xbc\x83\xbb"
"\x16\xf1\xcf\x56\x0c\xf5\x4a\x8b",
kRandomDataLength);
EXPECT_EQ(0, memcmp(expected.data(), random.data(), kRandomDataLength));
// Reset and make sure we get the same output.
SetRandomTestMode(true);
EXPECT_EQ(2154761789U, CreateRandomId());
EXPECT_EQ("h0ISP4S5SJKH/9EY", CreateRandomString(16));
EXPECT_EQ("41706e92-cdd3-46d9-a22d-8ff1737ffb11", CreateRandomUuid());
EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random));
EXPECT_EQ(kRandomDataLength, random.size());
EXPECT_EQ(0, memcmp(expected.data(), random.data(), kRandomDataLength));
// Test different character sets.
SetRandomTestMode(true);
std::string str;
EXPECT_TRUE(CreateRandomString(16, "a", &str));
EXPECT_EQ("aaaaaaaaaaaaaaaa", str);
EXPECT_TRUE(CreateRandomString(16, "abcd", &str));
EXPECT_EQ("dbaaabdaccbcabbd", str);
// Turn off test mode for other tests.
SetRandomTestMode(false);
}
class MockRandomGenerator : public RandomGenerator {
public:
MOCK_METHOD(void, Die, ());
~MockRandomGenerator() override { Die(); }
MOCK_METHOD(bool, Init, (const void* seed, size_t len), (override));
MOCK_METHOD(bool, Generate, (void* buf, size_t len), (override));
};
TEST(RandomTest, TestSetRandomGenerator) {
std::unique_ptr<MockRandomGenerator> will_move =
std::make_unique<MockRandomGenerator>();
MockRandomGenerator* generator = will_move.get();
SetRandomGenerator(std::move(will_move));
EXPECT_CALL(*generator, Init(_, sizeof(int))).WillOnce(Return(true));
EXPECT_TRUE(InitRandom(5));
std::string seed = "seed";
EXPECT_CALL(*generator, Init(seed.data(), seed.size()))
.WillOnce(Return(true));
EXPECT_TRUE(InitRandom(seed.data(), seed.size()));
uint32_t id = 4658;
EXPECT_CALL(*generator, Generate(_, sizeof(uint32_t)))
.WillOnce(DoAll(WithArg<0>(Invoke([&id](void* p) {
std::memcpy(p, &id, sizeof(uint32_t));
})),
Return(true)));
EXPECT_EQ(CreateRandomId(), id);
EXPECT_CALL(*generator, Generate)
.WillOnce(DoAll(
WithArgs<0, 1>([](void* p, size_t len) { std::memset(p, 0, len); }),
Return(true)));
EXPECT_THAT(CreateRandomUuid(), Not(IsEmpty()));
// Set the default random generator, and expect that mock generator is
// not used beyond this point.
EXPECT_CALL(*generator, Die);
EXPECT_CALL(*generator, Generate).Times(0);
SetDefaultRandomGenerator();
EXPECT_THAT(CreateRandomUuid(), Not(IsEmpty()));
}
} // namespace
} // namespace webrtc
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