Add base::UnguessableToken

base/nonce_unittest.cc

+// Copyright (c) 2016 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 "base/nonce.h"
+
+#include <type_traits>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+void TestSmallerThanOperator(const Nonce& a, const Nonce& b) {
+  EXPECT_TRUE(a < b);
+  EXPECT_FALSE(b < a);
+}
+
+TEST(NonceTest, VerifyEqualityOperators) {
+  // Deserialize is used for testing purposes.
+  // Use Nonce::Generate() to generate nonces in productions code instead.
+  Nonce nonce = Nonce::Deserialize(1, 2);
+  Nonce same_nonce = Nonce::Deserialize(1, 2);
+  Nonce diff_nonce = Nonce::Deserialize(1, 3);
+
+  EXPECT_TRUE(nonce == nonce);
+  EXPECT_FALSE(nonce != nonce);
+
+  EXPECT_TRUE(nonce == same_nonce);
+  EXPECT_FALSE(nonce != same_nonce);
+
+  EXPECT_FALSE(nonce == diff_nonce);
+  EXPECT_FALSE(diff_nonce == nonce);
+  EXPECT_TRUE(nonce != diff_nonce);
+  EXPECT_TRUE(diff_nonce != nonce);
+}
+
+TEST(NonceTest, VerifyConstructors) {
+  Nonce nonce = Nonce::Generate();
+  EXPECT_FALSE(nonce.is_null());
+
+  EXPECT_EQ(nonce, Nonce::Deserialize(nonce.high(), nonce.low()));
+  EXPECT_EQ(nonce, Nonce(nonce));
+
+  EXPECT_TRUE(Nonce().is_null());
+}
+
+TEST(NonceTest, VerifySmallerThanOperator) {
+  // Deserialize is used for testing purposes.
+  // Use Nonce::Generate() to generate nonces in productions code instead.
+
+  // a.low < b.low and a.high == b.high.
+  TestSmallerThanOperator(Nonce::Deserialize(0, 1), Nonce::Deserialize(0, 5));
+
+  // a.low == b.low and a.high < b.high.
+  TestSmallerThanOperator(Nonce::Deserialize(1, 0), Nonce::Deserialize(5, 0));
+
+  // a.low < b.low and a.high < b.high.
+  TestSmallerThanOperator(Nonce::Deserialize(1, 1), Nonce::Deserialize(5, 5));
+
+  // a.low > b.low and a.high < b.high.
+  TestSmallerThanOperator(Nonce::Deserialize(1, 10), Nonce::Deserialize(10, 1));
+}
+
+TEST(NonceTest, VerifyHash) {
+  Nonce nonce = Nonce::Generate();
+  EXPECT_EQ(base::HashInts64(nonce.high(), nonce.low()), NonceHash{}(nonce));
+}
+
+TEST(NonceTest, VerifyBasicUniqueness) {
+  EXPECT_NE(Nonce::Generate(), Nonce::Generate());
+}
+}