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116 lines
3.6 KiB
116 lines
3.6 KiB
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/helpers.h"
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#include <string.h>
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#include <string>
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#include "rtc_base/buffer.h"
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#include "test/gtest.h"
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namespace rtc {
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class RandomTest : public ::testing::Test {};
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TEST_F(RandomTest, TestCreateRandomId) {
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CreateRandomId();
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}
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TEST_F(RandomTest, TestCreateRandomDouble) {
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for (int i = 0; i < 100; ++i) {
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double r = CreateRandomDouble();
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EXPECT_GE(r, 0.0);
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EXPECT_LT(r, 1.0);
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}
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}
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TEST_F(RandomTest, TestCreateNonZeroRandomId) {
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EXPECT_NE(0U, CreateRandomNonZeroId());
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}
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TEST_F(RandomTest, TestCreateRandomString) {
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std::string random = CreateRandomString(256);
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EXPECT_EQ(256U, random.size());
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std::string random2;
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EXPECT_TRUE(CreateRandomString(256, &random2));
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EXPECT_NE(random, random2);
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EXPECT_EQ(256U, random2.size());
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}
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TEST_F(RandomTest, TestCreateRandomData) {
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static size_t kRandomDataLength = 32;
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std::string random1;
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std::string random2;
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EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random1));
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EXPECT_EQ(kRandomDataLength, random1.size());
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EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random2));
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EXPECT_EQ(kRandomDataLength, random2.size());
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EXPECT_NE(0, memcmp(random1.data(), random2.data(), kRandomDataLength));
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}
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TEST_F(RandomTest, TestCreateRandomStringEvenlyDivideTable) {
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static std::string kUnbiasedTable("01234567");
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std::string random;
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EXPECT_TRUE(CreateRandomString(256, kUnbiasedTable, &random));
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EXPECT_EQ(256U, random.size());
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static std::string kBiasedTable("0123456789");
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EXPECT_FALSE(CreateRandomString(256, kBiasedTable, &random));
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EXPECT_EQ(0U, random.size());
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}
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TEST_F(RandomTest, TestCreateRandomUuid) {
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std::string random = CreateRandomUuid();
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EXPECT_EQ(36U, random.size());
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}
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TEST_F(RandomTest, TestCreateRandomForTest) {
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// Make sure we get the output we expect.
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SetRandomTestMode(true);
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EXPECT_EQ(2154761789U, CreateRandomId());
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EXPECT_EQ("h0ISP4S5SJKH/9EY", CreateRandomString(16));
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EXPECT_EQ("41706e92-cdd3-46d9-a22d-8ff1737ffb11", CreateRandomUuid());
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static size_t kRandomDataLength = 32;
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std::string random;
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EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random));
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EXPECT_EQ(kRandomDataLength, random.size());
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Buffer expected(
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"\xbd\x52\x2a\x4b\x97\x93\x2f\x1c"
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"\xc4\x72\xab\xa2\x88\x68\x3e\xcc"
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"\xa3\x8d\xaf\x13\x3b\xbc\x83\xbb"
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"\x16\xf1\xcf\x56\x0c\xf5\x4a\x8b",
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kRandomDataLength);
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EXPECT_EQ(0, memcmp(expected.data(), random.data(), kRandomDataLength));
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// Reset and make sure we get the same output.
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SetRandomTestMode(true);
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EXPECT_EQ(2154761789U, CreateRandomId());
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EXPECT_EQ("h0ISP4S5SJKH/9EY", CreateRandomString(16));
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EXPECT_EQ("41706e92-cdd3-46d9-a22d-8ff1737ffb11", CreateRandomUuid());
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EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random));
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EXPECT_EQ(kRandomDataLength, random.size());
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EXPECT_EQ(0, memcmp(expected.data(), random.data(), kRandomDataLength));
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// Test different character sets.
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SetRandomTestMode(true);
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std::string str;
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EXPECT_TRUE(CreateRandomString(16, "a", &str));
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EXPECT_EQ("aaaaaaaaaaaaaaaa", str);
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EXPECT_TRUE(CreateRandomString(16, "abcd", &str));
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EXPECT_EQ("dbaaabdaccbcabbd", str);
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// Turn off test mode for other tests.
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SetRandomTestMode(false);
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}
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} // namespace rtc
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