java_plugin_unittest.cc

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// 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/java/java_generator.h>
#include <google/protobuf/compiler/command_line_interface.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/zero_copy_stream.h>
 
#include <google/protobuf/testing/file.h>
#include <google/protobuf/testing/file.h>
#include <google/protobuf/testing/googletest.h>
#include <gtest/gtest.h>
 
namespace google {
namespace protobuf {
namespace compiler {
namespace java {
namespace {
 
class TestGenerator : public CodeGenerator {
 public:
  TestGenerator() {}
  ~TestGenerator() {}
 
  virtual bool Generate(const FileDescriptor* file,
                        const std::string& parameter, GeneratorContext* context,
                        std::string* error) const {
    std::string filename = "Test.java";
    TryInsert(filename, "outer_class_scope", context);
    TryInsert(filename, "class_scope:foo.Bar", context);
    TryInsert(filename, "class_scope:foo.Bar.Baz", context);
    TryInsert(filename, "builder_scope:foo.Bar", context);
    TryInsert(filename, "builder_scope:foo.Bar.Baz", context);
    TryInsert(filename, "enum_scope:foo.Qux", context);
    return true;
  }
 
  void TryInsert(const std::string& filename,
                 const std::string& insertion_point,
                 GeneratorContext* context) const {
    std::unique_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(JavaPluginTest, PluginTest) {
  GOOGLE_CHECK_OK(File::SetContents(TestTempDir() + "/test.proto",
                             "syntax = \"proto2\";\n"
                             "package foo;\n"
                             "option java_package = \"\";\n"
                             "option java_outer_classname = \"Test\";\n"
                             "message Bar {\n"
                             "  message Baz {}\n"
                             "}\n"
                             "enum Qux { BLAH = 1; }\n",
                             true));
 
  CommandLineInterface cli;
  cli.SetInputsAreProtoPathRelative(true);
 
  JavaGenerator java_generator;
  TestGenerator test_generator;
  cli.RegisterGenerator("--java_out", &java_generator, "");
  cli.RegisterGenerator("--test_out", &test_generator, "");
 
  std::string proto_path = "-I" + TestTempDir();
  std::string java_out = "--java_out=" + TestTempDir();
  std::string test_out = "--test_out=" + TestTempDir();
 
  const char* argv[] = {"protoc", proto_path.c_str(), java_out.c_str(),
                        test_out.c_str(), "test.proto"};
 
  EXPECT_EQ(0, cli.Run(5, argv));
}
 
}  // namespace
}  // namespace java
}  // namespace compiler
}  // namespace protobuf
}  // namespace google