simple_printing_event_handler.h

// Copyright 2019 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
 
#pragma once
 
#include <cstddef>
#include <string_view>
 
#include "pw_preprocessor/compiler.h"
#include "pw_unit_test/event_handler.h"
#include "pw_unit_test/googletest_style_event_handler.h"
 
namespace pw::unit_test {
 
class SimplePrintingEventHandler : public GoogleTestStyleEventHandler {
 public:
  // Function for writing output as a string.
  using WriteFunction = void (*)(std::string_view string, bool append_newline);
 
  // Instantiates an event handler with a function to which to output results.
  // If verbose is set, information for successful tests is written as well as
  // failures.
  constexpr SimplePrintingEventHandler(WriteFunction write_function,
                                       bool verbose = false)
      : GoogleTestStyleEventHandler(verbose),
        write_(write_function),
        buffer_{} {}
 
 private:
  void WriteLine(const char* format, ...) override PW_PRINTF_FORMAT(2, 3);
 
  void Write(const char* content) override { write_(content, false); }
 
  WriteFunction write_;
  char buffer_[512];
};
 
}  // namespace pw::unit_test