// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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//
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// This file defines a protocol for running the conformance test suite
// in-process.  In other words, the suite itself will run in the same process as
// the code under test.
//
// For pros and cons of this approach, please see conformance.proto.

#ifndef CONFORMANCE_CONFORMANCE_TEST_H
#define CONFORMANCE_CONFORMANCE_TEST_H

#include <string>
#include <google/protobuf/wire_format_lite.h>

namespace conformance {
class ConformanceRequest;
class ConformanceResponse;
}  // namespace conformance

namespace google {
namespace protobuf {

class ConformanceTestRunner {
 public:
  // Call to run a single conformance test.
  //
  // "input" is a serialized conformance.ConformanceRequest.
  // "output" should be set to a serialized conformance.ConformanceResponse.
  //
  // If there is any error in running the test itself, set "runtime_error" in
  // the response.
  virtual void RunTest(const std::string& input, std::string* output) = 0;
};

// Class representing the test suite itself.  To run it, implement your own
// class derived from ConformanceTestRunner and then write code like:
//
//    class MyConformanceTestRunner : public ConformanceTestRunner {
//     public:
//      virtual void RunTest(...) {
//        // INSERT YOUR FRAMEWORK-SPECIFIC CODE HERE.
//      }
//    };
//
//    int main() {
//      MyConformanceTestRunner runner;
//      google::protobuf::ConformanceTestSuite suite;
//
//      std::string output;
//      suite.RunSuite(&runner, &output);
//    }
//
class ConformanceTestSuite {
 public:
  ConformanceTestSuite() : verbose_(false) {}

  // Sets the list of tests that are expected to fail when RunSuite() is called.
  // RunSuite() will fail unless the set of failing tests is exactly the same
  // as this list.
  void SetFailureList(const std::vector<std::string>& failure_list);

  // Run all the conformance tests against the given test runner.
  // Test output will be stored in "output".
  //
  // Returns true if the set of failing tests was exactly the same as the
  // failure list.  If SetFailureList() was not called, returns true if all
  // tests passed.
  bool RunSuite(ConformanceTestRunner* runner, std::string* output);

 private:
  void ReportSuccess(const std::string& test_name);
  void ReportFailure(const std::string& test_name, const char* fmt, ...);
  void RunTest(const std::string& test_name,
               const conformance::ConformanceRequest& request,
               conformance::ConformanceResponse* response);
  void ExpectParseFailureForProto(const std::string& proto,
                                  const std::string& test_name);
  void ExpectHardParseFailureForProto(const std::string& proto,
                                      const std::string& test_name);
  void TestPrematureEOFForType(google::protobuf::FieldDescriptor::Type type);
  bool CheckSetEmpty(const set<string>& set_to_check, const char* msg);
  ConformanceTestRunner* runner_;
  int successes_;
  int failures_;
  bool verbose_;
  std::string output_;

  // The set of test names that are expected to fail in this run, but haven't
  // failed yet.
  std::set<std::string> expected_to_fail_;

  // The set of test names that have been run.  Used to ensure that there are no
  // duplicate names in the suite.
  std::set<std::string> test_names_;

  // The set of tests that failed, but weren't expected to.
  std::set<std::string> unexpected_failing_tests_;

  // The set of tests that succeeded, but weren't expected to.
  std::set<std::string> unexpected_succeeding_tests_;
};

}  // namespace protobuf
}  // namespace google

#endif  // CONFORMANCE_CONFORMANCE_TEST_H