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