Add base::UnguessableToken

base/unguessable_token_unittest.cc

Index: base/unguessable_token_unittest.cc
diff --git a/base/unguessable_token_unittest.cc b/base/unguessable_token_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c4c435fed835b8de41f182c441801aa6bbce5b3b
--- /dev/null
+++ b/base/unguessable_token_unittest.cc
@@ -0,0 +1,114 @@
+// 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/unguessable_token.h"
+
+#include <type_traits>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+void TestSmallerThanOperator(const UnguessableToken& a,
+                             const UnguessableToken& b) {
+  EXPECT_TRUE(a < b);
+  EXPECT_FALSE(b < a);
+}
+
+TEST(UnguessableTokenTest, VerifyEqualityOperators) {
+  // Deserialize is used for testing purposes.
+  // Use UnguessableToken::Create() in production code instead.
+  UnguessableToken token = UnguessableToken::Deserialize(1, 2);
+  UnguessableToken same_token = UnguessableToken::Deserialize(1, 2);
+  UnguessableToken diff_token = UnguessableToken::Deserialize(1, 3);
+
+  EXPECT_TRUE(token == token);
+  EXPECT_FALSE(token != token);
+
+  EXPECT_TRUE(token == same_token);
+  EXPECT_FALSE(token != same_token);
+
+  EXPECT_FALSE(token == diff_token);
+  EXPECT_FALSE(diff_token == token);
+  EXPECT_TRUE(token != diff_token);
+  EXPECT_TRUE(diff_token != token);
+}
+
+TEST(UnguessableTokenTest, VerifyConstructors) {
+  UnguessableToken token = UnguessableToken::Create();
+  EXPECT_FALSE(token.is_empty());
+  EXPECT_TRUE(token);
+
+  UnguessableToken copied_token(token);
+  EXPECT_TRUE(copied_token);
+  EXPECT_EQ(token, copied_token);
+
+  UnguessableToken uninitialized;
+  EXPECT_TRUE(uninitialized.is_empty());
+  EXPECT_FALSE(uninitialized);
+
+  EXPECT_TRUE(UnguessableToken().is_empty());
+  EXPECT_FALSE(UnguessableToken());
+}
+
+TEST(UnguessableTokenTest, VerifySerialization) {
+  UnguessableToken token = UnguessableToken::Create();
+
+  uint64_t high = token.GetHighForSerialization();
+  uint64_t low = token.GetLowForSerialization();
+
+  EXPECT_TRUE(high);
+  EXPECT_TRUE(low);
+
+  UnguessableToken Deserialized = UnguessableToken::Deserialize(high, low);
+  EXPECT_EQ(token, Deserialized);
+}
+
+TEST(UnguessableTokenTest, VerifyToString) {
+  UnguessableToken token = UnguessableToken::Deserialize(0x123, 0xABC);
+  std::string expected = "(0000012300000ABC)";
+
+  EXPECT_EQ(expected, token.ToString());
+}
+
+TEST(UnguessableTokenTest, VerifySmallerThanOperator) {
+  // Deserialize is used for testing purposes.
+  // Use UnguessableToken::Create() in production code instead.
+  {
+    SCOPED_TRACE("a.low < b.low and a.high == b.high.");
+    TestSmallerThanOperator(UnguessableToken::Deserialize(0, 1),
+                            UnguessableToken::Deserialize(0, 5));
+  }
+  {
+    SCOPED_TRACE("a.low == b.low and a.high < b.high.");
+    TestSmallerThanOperator(UnguessableToken::Deserialize(1, 0),
+                            UnguessableToken::Deserialize(5, 0));
+  }
+  {
+    SCOPED_TRACE("a.low < b.low and a.high < b.high.");
+    TestSmallerThanOperator(UnguessableToken::Deserialize(1, 1),
+                            UnguessableToken::Deserialize(5, 5));
+  }
+  {
+    SCOPED_TRACE("a.low > b.low and a.high < b.high.");
+    TestSmallerThanOperator(UnguessableToken::Deserialize(1, 10),
+                            UnguessableToken::Deserialize(10, 1));
+  }
+}
+
+TEST(UnguessableTokenTest, VerifyHash) {
+  UnguessableToken token = UnguessableToken::Create();
+
+  EXPECT_EQ(base::HashInts64(token.GetHighForSerialization(),
+                             token.GetLowForSerialization()),
+            UnguessableTokenHash()(token));
+}
+
+TEST(UnguessableTokenTest, VerifyBasicUniqueness) {
+  EXPECT_NE(UnguessableToken::Create(), UnguessableToken::Create());
+
+  UnguessableToken token = UnguessableToken::Create();
+  EXPECT_NE(token.GetHighForSerialization(), token.GetLowForSerialization());
+}
+}