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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// http://code.google.com/p/protobuf/
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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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// * 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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// * 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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// 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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// Author: kenton@google.com (Kenton Varda)
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// Based on original Protocol Buffers design by
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// Sanjay Ghemawat, Jeff Dean, and others.
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// This test insures that google/protobuf/descriptor.pb.{h,cc} match exactly
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// what would be generated by the protocol compiler. These files are not
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// generated automatically at build time because they are compiled into the
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// protocol compiler itself. So, if they were auto-generated, you'd have a
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// chicken-and-egg problem.
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// If this test fails, run the script
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// "generate_descriptor_proto.sh" and add
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// descriptor.pb.{h,cc} to your changelist.
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#include <google/protobuf/compiler/cpp/cpp_generator.h>
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#include <google/protobuf/compiler/importer.h>
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#include <google/protobuf/descriptor.h>
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#include <google/protobuf/io/zero_copy_stream_impl.h>
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#include <google/protobuf/stubs/stl_util-inl.h>
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#include <google/protobuf/stubs/map-util.h>
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#include <google/protobuf/stubs/strutil.h>
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#include <google/protobuf/stubs/substitute.h>
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#include <google/protobuf/testing/file.h>
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#include <google/protobuf/testing/googletest.h>
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#include <gtest/gtest.h>
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class MockErrorCollector : public MultiFileErrorCollector {
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MockErrorCollector() {}
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~MockErrorCollector() {}
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// implements ErrorCollector ---------------------------------------
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void AddError(const string& filename, int line, int column,
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const string& message) {
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strings::SubstituteAndAppend(&text_, "$0:$1:$2: $3\n",
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filename, line, column, message);
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class MockOutputDirectory : public OutputDirectory {
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MockOutputDirectory() {}
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~MockOutputDirectory() {
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STLDeleteValues(&files_);
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void ExpectFileMatches(const string& virtual_filename,
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const string& physical_filename) {
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string* expected_contents = FindPtrOrNull(files_, virtual_filename);
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ASSERT_TRUE(expected_contents != NULL)
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<< "Generator failed to generate file: " << virtual_filename;
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string actual_contents;
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File::ReadFileToStringOrDie(
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TestSourceDir() + "/" + physical_filename,
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EXPECT_TRUE(actual_contents == *expected_contents)
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<< physical_filename << " needs to be regenerated. Please run "
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"generate_descriptor_proto.sh and add this file "
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// implements OutputDirectory --------------------------------------
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virtual io::ZeroCopyOutputStream* Open(const string& filename) {
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string** map_slot = &files_[filename];
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if (*map_slot != NULL) delete *map_slot;
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*map_slot = new string;
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return new io::StringOutputStream(*map_slot);
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map<string, string*> files_;
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TEST(BootstrapTest, GeneratedDescriptorMatches) {
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MockErrorCollector error_collector;
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DiskSourceTree source_tree;
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source_tree.MapPath("", TestSourceDir());
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Importer importer(&source_tree, &error_collector);
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const FileDescriptor* proto_file =
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importer.Import("google/protobuf/descriptor.proto");
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const FileDescriptor* plugin_proto_file =
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importer.Import("google/protobuf/compiler/plugin.proto");
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EXPECT_EQ("", error_collector.text_);
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ASSERT_TRUE(proto_file != NULL);
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ASSERT_TRUE(plugin_proto_file != NULL);
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CppGenerator generator;
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MockOutputDirectory output_directory;
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parameter = "dllexport_decl=LIBPROTOBUF_EXPORT";
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ASSERT_TRUE(generator.Generate(proto_file, parameter,
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&output_directory, &error));
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parameter = "dllexport_decl=LIBPROTOC_EXPORT";
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ASSERT_TRUE(generator.Generate(plugin_proto_file, parameter,
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&output_directory, &error));
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output_directory.ExpectFileMatches("google/protobuf/descriptor.pb.h",
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"google/protobuf/descriptor.pb.h");
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output_directory.ExpectFileMatches("google/protobuf/descriptor.pb.cc",
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"google/protobuf/descriptor.pb.cc");
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output_directory.ExpectFileMatches("google/protobuf/compiler/plugin.pb.h",
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"google/protobuf/compiler/plugin.pb.h");
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output_directory.ExpectFileMatches("google/protobuf/compiler/plugin.pb.cc",
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"google/protobuf/compiler/plugin.pb.cc");
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} // namespace compiler
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} // namespace protobuf
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} // namespace google