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30
31// Author: kenton@google.com (Kenton Varda)
32
33#ifndef GOOGLE_PROTOBUF_COMPILER_MOCK_CODE_GENERATOR_H__
34#define GOOGLE_PROTOBUF_COMPILER_MOCK_CODE_GENERATOR_H__
35
36#include <string>
37#include <google/protobuf/compiler/code_generator.h>
38
39namespace google {
40namespace protobuf {
41namespace compiler {
42
43// A mock CodeGenerator, used by command_line_interface_unittest.  This is in
44// its own file so that it can be used both directly and as a plugin.
45//
46// Generate() produces some output which can be checked by ExpectCalled().  The
47// generator can run in a different process (e.g. a plugin).
48//
49// If the parameter is "insert=NAMES", the MockCodeGenerator will insert lines
50// into the files generated by other MockCodeGenerators instead of creating
51// its own file.  NAMES is a comma-separated list of the names of those other
52// MockCodeGenerators.
53//
54// MockCodeGenerator will also modify its behavior slightly if the input file
55// contains a message type with one of the following names:
56//   MockCodeGenerator_Error:  Causes Generate() to return false and set the
57//     error message to "Saw message type MockCodeGenerator_Error."
58//   MockCodeGenerator_Exit:  Generate() prints "Saw message type
59//     MockCodeGenerator_Exit." to stderr and then calls exit(123).
60//   MockCodeGenerator_Abort:  Generate() prints "Saw message type
61//     MockCodeGenerator_Abort." to stderr and then calls abort().
62class MockCodeGenerator : public CodeGenerator {
63 public:
64  MockCodeGenerator(const string& name);
65  virtual ~MockCodeGenerator();
66
67  // Expect (via gTest) that a MockCodeGenerator with the given name was called
68  // with the given parameters by inspecting the output location.
69  //
70  // |insertions| is a comma-separated list of names of MockCodeGenerators which
71  // should have inserted lines into this file.
72  static void ExpectGenerated(const string& name,
73                              const string& parameter,
74                              const string& insertions,
75                              const string& file,
76                              const string& first_message_name,
77                              const string& output_directory);
78
79  // Get the name of the file which would be written by the given generator.
80  static string GetOutputFileName(const string& generator_name,
81                                  const FileDescriptor* file);
82  static string GetOutputFileName(const string& generator_name,
83                                  const string& file);
84
85  // implements CodeGenerator ----------------------------------------
86
87  virtual bool Generate(const FileDescriptor* file,
88                        const string& parameter,
89                        OutputDirectory* output_directory,
90                        string* error) const;
91
92 private:
93  string name_;
94
95  static string GetOutputFileContent(const string& generator_name,
96                                     const string& parameter,
97                                     const FileDescriptor* file);
98  static string GetOutputFileContent(const string& generator_name,
99                                     const string& parameter,
100                                     const string& file,
101                                     const string& first_message_name);
102};
103
104}  // namespace compiler
105}  // namespace protobuf
106
107}  // namespace google
108#endif  // GOOGLE_PROTOBUF_COMPILER_MOCK_CODE_GENERATOR_H__
109