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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
//
// This test insures that google/protobuf/descriptor.pb.{h,cc} match exactly
// what would be generated by the protocol compiler. These files are not
// generated automatically at build time because they are compiled into the
// protocol compiler itself. So, if they were auto-generated, you'd have a
// chicken-and-egg problem.
//
// If this test fails, run the script
// "generate_descriptor_proto.sh" and add
// descriptor.pb.{h,cc} to your changelist.
#include <map>
#include <google/protobuf/compiler/cpp/cpp_generator.h>
#include <google/protobuf/compiler/importer.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/stubs/stl_util-inl.h>
#include <google/protobuf/stubs/map-util.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/stubs/substitute.h>
#include <google/protobuf/testing/file.h>
#include <google/protobuf/testing/googletest.h>
#include <gtest/gtest.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
namespace {
class MockErrorCollector : public MultiFileErrorCollector {
public:
MockErrorCollector() {}
~MockErrorCollector() {}
string text_;
// implements ErrorCollector ---------------------------------------
void AddError(const string& filename, int line, int column,
const string& message) {
strings::SubstituteAndAppend(&text_, "$0:$1:$2: $3\n",
filename, line, column, message);
}
};
class MockOutputDirectory : public OutputDirectory {
public:
MockOutputDirectory() {}
~MockOutputDirectory() {
STLDeleteValues(&files_);
}
void ExpectFileMatches(const string& virtual_filename,
const string& physical_filename) {
string* expected_contents = FindPtrOrNull(files_, virtual_filename);
ASSERT_TRUE(expected_contents != NULL)
<< "Generator failed to generate file: " << virtual_filename;
string actual_contents;
File::ReadFileToStringOrDie(
TestSourceDir() + "/" + physical_filename,
&actual_contents);
EXPECT_TRUE(actual_contents == *expected_contents)
<< physical_filename << " needs to be regenerated. Please run "
"generate_descriptor_proto.sh and add this file "
"to your CL.";
}
// implements OutputDirectory --------------------------------------
virtual io::ZeroCopyOutputStream* Open(const string& filename) {
string** map_slot = &files_[filename];
if (*map_slot != NULL) delete *map_slot;
*map_slot = new string;
return new io::StringOutputStream(*map_slot);
}
private:
map<string, string*> files_;
};
TEST(BootstrapTest, GeneratedDescriptorMatches) {
MockErrorCollector error_collector;
DiskSourceTree source_tree;
source_tree.MapPath("", TestSourceDir());
Importer importer(&source_tree, &error_collector);
const FileDescriptor* proto_file =
importer.Import("google/protobuf/descriptor.proto");
EXPECT_EQ("", error_collector.text_);
ASSERT_TRUE(proto_file != NULL);
CppGenerator generator;
MockOutputDirectory output_directory;
string error;
string parameter;
parameter = "dllexport_decl=LIBPROTOBUF_EXPORT";
ASSERT_TRUE(generator.Generate(proto_file, parameter,
&output_directory, &error));
output_directory.ExpectFileMatches("google/protobuf/descriptor.pb.h",
"google/protobuf/descriptor.pb.h");
output_directory.ExpectFileMatches("google/protobuf/descriptor.pb.cc",
"google/protobuf/descriptor.pb.cc");
}
} // namespace
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
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