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/*
* Copyright 2022 The Android Open Source Project
*
* 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
*
* http://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.
*/
#include <cstddef>
#include <future>
#include <string>
namespace bluetooth {
namespace testing {
class LogCapture {
public:
LogCapture();
~LogCapture();
// Rewind file pointer to start of log
// Returns a |this| pointer for chaining. See |Find|
LogCapture* Rewind();
// Searches from filepointer to end of file for |to_find| string
// Returns true if found, false otherwise
bool Find(std::string to_find);
// Reads and returns the entirety of the backing store into a string
std::string Read();
// Flushes contents of log capture back to |stderr|
void Flush();
// Synchronize buffer contents to file descriptor
void Sync();
// Returns the backing store size in bytes
size_t Size() const;
// Truncates and resets the file pointer discarding all logs up to this point
void Reset();
// Wait until the provided string shows up in the logs
void WaitUntilLogContains(std::promise<void>* promise, std::string text);
private:
std::pair<int, int> create_backing_store() const;
bool set_non_blocking(int fd) const;
void clean_up();
int dup_fd_{-1};
int fd_{-1};
int original_stderr_fd_{-1};
};
} // namespace testing
} // namespace bluetooth
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