cpp_plugin_unittest.cc revision d0332953cda33fb4f8e24ebff9c49159b69c43d6 
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30
31// Author: kenton@google.com (Kenton Varda)
32//
33// TODO(kenton):  Share code with the versions of this test in other languages?
34//   It seemed like parameterizing it would add more complexity than it is
35//   worth.
36
37#include <google/protobuf/compiler/cpp/cpp_generator.h>
38#include <google/protobuf/compiler/command_line_interface.h>
39#include <google/protobuf/io/zero_copy_stream.h>
40#include <google/protobuf/io/printer.h>
41
42#include <google/protobuf/testing/googletest.h>
43#include <gtest/gtest.h>
44#include <google/protobuf/testing/file.h>
45
46namespace google {
47namespace protobuf {
48namespace compiler {
49namespace cpp {
50namespace {
51
52class TestGenerator : public CodeGenerator {
53 public:
54  TestGenerator() {}
55  ~TestGenerator() {}
56
57  virtual bool Generate(const FileDescriptor* file,
58                        const string& parameter,
59                        OutputDirectory* output_directory,
60                        string* error) const {
61    TryInsert("test.pb.h", "includes", output_directory);
62    TryInsert("test.pb.h", "namespace_scope", output_directory);
63    TryInsert("test.pb.h", "global_scope", output_directory);
64    TryInsert("test.pb.h", "class_scope:foo.Bar", output_directory);
65    TryInsert("test.pb.h", "class_scope:foo.Bar.Baz", output_directory);
66
67    TryInsert("test.pb.cc", "includes", output_directory);
68    TryInsert("test.pb.cc", "namespace_scope", output_directory);
69    TryInsert("test.pb.cc", "global_scope", output_directory);
70    return true;
71  }
72
73  void TryInsert(const string& filename, const string& insertion_point,
74                 OutputDirectory* output_directory) const {
75    scoped_ptr<io::ZeroCopyOutputStream> output(
76      output_directory->OpenForInsert(filename, insertion_point));
77    io::Printer printer(output.get(), '$');
78    printer.Print("// inserted $name$\n", "name", insertion_point);
79  }
80};
81
82// This test verifies that all the expected insertion points exist.  It does
83// not verify that they are correctly-placed; that would require actually
84// compiling the output which is a bit more than I care to do for this test.
85TEST(CppPluginTest, PluginTest) {
86  File::WriteStringToFileOrDie(
87      "syntax = \"proto2\";\n"
88      "package foo;\n"
89      "message Bar {\n"
90      "  message Baz {}\n"
91      "}\n",
92      TestTempDir() + "/test.proto");
93
94  google::protobuf::compiler::CommandLineInterface cli;
95  cli.SetInputsAreProtoPathRelative(true);
96
97  CppGenerator cpp_generator;
98  TestGenerator test_generator;
99  cli.RegisterGenerator("--cpp_out", &cpp_generator, "");
100  cli.RegisterGenerator("--test_out", &test_generator, "");
101
102  string proto_path = "-I" + TestTempDir();
103  string cpp_out = "--cpp_out=" + TestTempDir();
104  string test_out = "--test_out=" + TestTempDir();
105
106  const char* argv[] = {
107    "protoc",
108    proto_path.c_str(),
109    cpp_out.c_str(),
110    test_out.c_str(),
111    "test.proto"
112  };
113
114  EXPECT_EQ(0, cli.Run(5, argv));
115}
116
117}  // namespace
118}  // namespace cpp
119}  // namespace compiler
120}  // namespace protobuf
121}  // namespace google
122