1 // Copyright 2016 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "base/unguessable_token.h"
11 #include "base/hash/hash.h"
12 #include "base/values.h"
13 #include "testing/gtest/include/gtest/gtest.h"
17 void TestSmallerThanOperator(const UnguessableToken& a,
18 const UnguessableToken& b) {
23 TEST(UnguessableTokenTest, VerifyEveryBit) {
24 absl::optional<UnguessableToken> token = UnguessableToken::Deserialize(1, 2);
25 ASSERT_TRUE(token.has_value());
29 for (uint64_t bit = 1; bit != 0; bit <<= 1) {
30 uint64_t new_high = high ^ bit;
31 absl::optional<UnguessableToken> new_token =
32 UnguessableToken::Deserialize(new_high, low);
33 ASSERT_TRUE(new_token.has_value());
34 EXPECT_FALSE(*token == *new_token);
37 for (uint64_t bit = 1; bit != 0; bit <<= 1) {
38 uint64_t new_low = low ^ bit;
39 absl::optional<UnguessableToken> new_token =
40 UnguessableToken::Deserialize(high, new_low);
41 ASSERT_TRUE(new_token.has_value());
42 EXPECT_FALSE(*token == *new_token);
46 TEST(UnguessableTokenTest, VerifyEqualityOperators) {
47 // Deserialize is used for testing purposes.
48 // Use UnguessableToken::Create() in production code instead.
49 UnguessableToken token = UnguessableToken::Deserialize(1, 2).value();
50 UnguessableToken same_token = UnguessableToken::Deserialize(1, 2).value();
51 UnguessableToken diff_token = UnguessableToken::Deserialize(1, 3).value();
52 UnguessableToken empty_token;
54 EXPECT_TRUE(token == token);
55 EXPECT_FALSE(token != token);
57 EXPECT_TRUE(token == same_token);
58 EXPECT_FALSE(token != same_token);
60 EXPECT_FALSE(token == diff_token);
61 EXPECT_FALSE(diff_token == token);
62 EXPECT_TRUE(token != diff_token);
63 EXPECT_TRUE(diff_token != token);
65 EXPECT_TRUE(empty_token == empty_token);
66 EXPECT_FALSE(empty_token != empty_token);
67 for (const UnguessableToken& this_token : {token, same_token, diff_token}) {
68 EXPECT_FALSE(this_token == empty_token);
69 EXPECT_TRUE(this_token != empty_token);
73 TEST(UnguessableTokenTest, VerifyConstructors) {
74 UnguessableToken token = UnguessableToken::Create();
75 EXPECT_FALSE(token.is_empty());
78 UnguessableToken copied_token(token);
79 EXPECT_TRUE(copied_token);
80 EXPECT_EQ(token, copied_token);
82 UnguessableToken uninitialized;
83 EXPECT_TRUE(uninitialized.is_empty());
84 EXPECT_FALSE(uninitialized);
86 EXPECT_TRUE(UnguessableToken().is_empty());
87 EXPECT_FALSE(UnguessableToken());
90 TEST(UnguessableTokenTest, VerifySerialization) {
91 UnguessableToken token = UnguessableToken::Create();
93 uint64_t high = token.GetHighForSerialization();
94 uint64_t low = token.GetLowForSerialization();
99 absl::optional<UnguessableToken> Deserialized =
100 UnguessableToken::Deserialize(high, low);
101 ASSERT_TRUE(Deserialized.has_value());
102 EXPECT_EQ(token, *Deserialized);
105 // Common case (~88% of the time) - no leading zeroes in high_ nor low_.
106 TEST(UnguessableTokenTest, VerifyToString1) {
107 UnguessableToken token =
108 UnguessableToken::Deserialize(0x1234567890ABCDEF, 0xFEDCBA0987654321)
110 std::string expected = "1234567890ABCDEFFEDCBA0987654321";
112 EXPECT_EQ(expected, token.ToString());
114 std::string expected_stream = "(1234567890ABCDEFFEDCBA0987654321)";
115 std::stringstream stream;
117 EXPECT_EQ(expected_stream, stream.str());
120 // Less common case - leading zeroes in high_ or low_ (testing with both).
121 TEST(UnguessableTokenTest, VerifyToString2) {
122 UnguessableToken token = UnguessableToken::Deserialize(0x123, 0xABC).value();
123 std::string expected = "00000000000001230000000000000ABC";
125 EXPECT_EQ(expected, token.ToString());
127 std::string expected_stream = "(00000000000001230000000000000ABC)";
128 std::stringstream stream;
130 EXPECT_EQ(expected_stream, stream.str());
133 TEST(UnguessableTokenTest, VerifyToStringUniqueness) {
134 const UnguessableToken token1 =
135 UnguessableToken::Deserialize(0x0000000012345678, 0x0000000123456789)
137 const UnguessableToken token2 =
138 UnguessableToken::Deserialize(0x0000000123456781, 0x0000000023456789)
140 EXPECT_NE(token1.ToString(), token2.ToString());
143 TEST(UnguessableTokenTest, VerifyDeserializeZeroes) {
144 absl::optional<UnguessableToken> token = UnguessableToken::Deserialize(0, 0);
146 EXPECT_FALSE(token.has_value());
149 TEST(UnguessableTokenTest, VerifySmallerThanOperator) {
150 // Deserialize is used for testing purposes.
151 // Use UnguessableToken::Create() in production code instead.
153 SCOPED_TRACE("a.low < b.low and a.high == b.high.");
154 TestSmallerThanOperator(UnguessableToken::Deserialize(0, 1).value(),
155 UnguessableToken::Deserialize(0, 5).value());
158 SCOPED_TRACE("a.low == b.low and a.high < b.high.");
159 TestSmallerThanOperator(UnguessableToken::Deserialize(1, 0).value(),
160 UnguessableToken::Deserialize(5, 0).value());
163 SCOPED_TRACE("a.low < b.low and a.high < b.high.");
164 TestSmallerThanOperator(UnguessableToken::Deserialize(1, 1).value(),
165 UnguessableToken::Deserialize(5, 5).value());
168 SCOPED_TRACE("a.low > b.low and a.high < b.high.");
169 TestSmallerThanOperator(UnguessableToken::Deserialize(1, 10).value(),
170 UnguessableToken::Deserialize(10, 1).value());
174 TEST(UnguessableTokenTest, VerifyHash) {
175 UnguessableToken token = UnguessableToken::Create();
177 EXPECT_EQ(base::HashInts64(token.GetHighForSerialization(),
178 token.GetLowForSerialization()),
179 UnguessableTokenHash()(token));
182 TEST(UnguessableTokenTest, VerifyBasicUniqueness) {
183 EXPECT_NE(UnguessableToken::Create(), UnguessableToken::Create());
185 UnguessableToken token = UnguessableToken::Create();
186 EXPECT_NE(token.GetHighForSerialization(), token.GetLowForSerialization());