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+// Copyright 2005 Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// ----
+// Author: lar@google.com (Laramie Leavitt)
+//
+// These tests are really compile time tests.
+// If you try to step through this in a debugger
+// you will not see any evaluations, merely that
+// value is assigned true or false sequentially.
+
+#include <google/protobuf/stubs/template_util.h>
+
+#include <google/protobuf/testing/googletest.h>
+#include <gtest/gtest.h>
+
+namespace GOOGLE_NAMESPACE = google::protobuf::internal;
+
+namespace google {
+namespace protobuf {
+namespace internal {
+namespace {
+
+TEST(TemplateUtilTest, TestSize) {
+ EXPECT_GT(sizeof(GOOGLE_NAMESPACE::big_), sizeof(GOOGLE_NAMESPACE::small_));
+}
+
+TEST(TemplateUtilTest, TestIntegralConstants) {
+ // test the built-in types.
+ EXPECT_TRUE(true_type::value);
+ EXPECT_FALSE(false_type::value);
+
+ typedef integral_constant<int, 1> one_type;
+ EXPECT_EQ(1, one_type::value);
+}
+
+TEST(TemplateUtilTest, TestTemplateIf) {
+ typedef if_<true, true_type, false_type>::type if_true;
+ EXPECT_TRUE(if_true::value);
+
+ typedef if_<false, true_type, false_type>::type if_false;
+ EXPECT_FALSE(if_false::value);
+}
+
+TEST(TemplateUtilTest, TestTemplateTypeEquals) {
+ // Check that the TemplateTypeEquals works correctly.
+ bool value = false;
+
+ // Test the same type is true.
+ value = type_equals_<int, int>::value;
+ EXPECT_TRUE(value);
+
+ // Test different types are false.
+ value = type_equals_<float, int>::value;
+ EXPECT_FALSE(value);
+
+ // Test type aliasing.
+ typedef const int foo;
+ value = type_equals_<const foo, const int>::value;
+ EXPECT_TRUE(value);
+}
+
+TEST(TemplateUtilTest, TestTemplateAndOr) {
+ // Check that the TemplateTypeEquals works correctly.
+ bool value = false;
+
+ // Yes && Yes == true.
+ value = and_<true_, true_>::value;
+ EXPECT_TRUE(value);
+ // Yes && No == false.
+ value = and_<true_, false_>::value;
+ EXPECT_FALSE(value);
+ // No && Yes == false.
+ value = and_<false_, true_>::value;
+ EXPECT_FALSE(value);
+ // No && No == false.
+ value = and_<false_, false_>::value;
+ EXPECT_FALSE(value);
+
+ // Yes || Yes == true.
+ value = or_<true_, true_>::value;
+ EXPECT_TRUE(value);
+ // Yes || No == true.
+ value = or_<true_, false_>::value;
+ EXPECT_TRUE(value);
+ // No || Yes == true.
+ value = or_<false_, true_>::value;
+ EXPECT_TRUE(value);
+ // No || No == false.
+ value = or_<false_, false_>::value;
+ EXPECT_FALSE(value);
+}
+
+TEST(TemplateUtilTest, TestIdentity) {
+ EXPECT_TRUE(
+ (type_equals_<GOOGLE_NAMESPACE::identity_<int>::type, int>::value));
+ EXPECT_TRUE(
+ (type_equals_<GOOGLE_NAMESPACE::identity_<void>::type, void>::value));
+}
+
+} // anonymous namespace
+} // namespace internal
+} // namespace protobuf
+} // namespace google