text: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
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  // modification, are permitted provided that the following conditions are
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  //
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  // 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.
  //
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  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Author: kenton@google.com (Kenton Varda)
  //
  // TODO(kenton):  Share code with the versions of this test in other languages?
  //   It seemed like parameterizing it would add more complexity than it is
  //   worth.
  
  #include <memory>
  
  #include <google/protobuf/compiler/cpp/cpp_generator.h>
  #include <google/protobuf/compiler/command_line_interface.h>
  #include <google/protobuf/io/zero_copy_stream.h>
  #include <google/protobuf/io/printer.h>
  
  #include <google/protobuf/testing/googletest.h>
  #include <gtest/gtest.h>
  #include <google/protobuf/testing/file.h>
  
  namespace google {
  namespace protobuf {
  namespace compiler {
  namespace cpp {
  namespace {
  
  class TestGenerator : public CodeGenerator {
   public:
    TestGenerator() {}
    ~TestGenerator() {}
  
    virtual bool Generate(const FileDescriptor* file,
                          const string& parameter,
                          GeneratorContext* context,
                          string* error) const {
      TryInsert("test.pb.h", "includes", context);
      TryInsert("test.pb.h", "namespace_scope", context);
      TryInsert("test.pb.h", "global_scope", context);
      TryInsert("test.pb.h", "class_scope:foo.Bar", context);
      TryInsert("test.pb.h", "class_scope:foo.Bar.Baz", context);
  
      TryInsert("test.pb.cc", "includes", context);
      TryInsert("test.pb.cc", "namespace_scope", context);
      TryInsert("test.pb.cc", "global_scope", context);
      return true;
    }
  
    void TryInsert(const string& filename, const string& insertion_point,
                   GeneratorContext* context) const {
      scoped_ptr<io::ZeroCopyOutputStream> output(
          context->OpenForInsert(filename, insertion_point));
      io::Printer printer(output.get(), '$');
      printer.Print("// inserted $name$\n", "name", insertion_point);
    }
  };
  
  // This test verifies that all the expected insertion points exist.  It does
  // not verify that they are correctly-placed; that would require actually
  // compiling the output which is a bit more than I care to do for this test.
  TEST(CppPluginTest, PluginTest) {
    GOOGLE_CHECK_OK(File::SetContents(TestTempDir() + "/test.proto",
                               "syntax = \"proto2\";\n"
                               "package foo;\n"
                               "message Bar {\n"
                               "  message Baz {}\n"
                               "}\n",
                               true));
  
    google::protobuf::compiler::CommandLineInterface cli;
    cli.SetInputsAreProtoPathRelative(true);
  
    CppGenerator cpp_generator;
    TestGenerator test_generator;
    cli.RegisterGenerator("--cpp_out", &cpp_generator, "");
    cli.RegisterGenerator("--test_out", &test_generator, "");
  
    string proto_path = "-I" + TestTempDir();
    string cpp_out = "--cpp_out=" + TestTempDir();
    string test_out = "--test_out=" + TestTempDir();
  
    const char* argv[] = {
      "protoc",
      proto_path.c_str(),
      cpp_out.c_str(),
      test_out.c_str(),
      "test.proto"
    };
  
    EXPECT_EQ(0, cli.Run(5, argv));
  }
  
  }  // namespace
  }  // namespace cpp
  }  // namespace compiler
  }  // namespace protobuf
  }  // namespace google
  