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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "storage/browser/file_system/file_stream_test_utils.h"
#include <string>
#include <utility>
#include "base/types/expected.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "storage/browser/file_system/file_stream_reader.h"
#include "storage/browser/file_system/file_stream_writer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace storage {
base::expected<std::string, net::Error> ReadFromReader(FileStreamReader& reader,
size_t bytes_to_read) {
std::string result;
size_t total_bytes_read = 0;
while (total_bytes_read < bytes_to_read) {
scoped_refptr<net::IOBufferWithSize> buf(
base::MakeRefCounted<net::IOBufferWithSize>(bytes_to_read -
total_bytes_read));
net::TestCompletionCallback callback;
int rv = reader.Read(buf.get(), buf->size(), callback.callback());
if (rv == net::ERR_IO_PENDING) {
rv = callback.WaitForResult();
}
if (rv < 0) {
return base::unexpected(static_cast<net::Error>(rv));
} else if (rv == 0) {
break;
}
total_bytes_read += rv;
result.append(buf->data(), rv);
}
return result;
}
int64_t GetLengthFromReader(FileStreamReader* reader) {
EXPECT_NE(nullptr, reader);
net::TestInt64CompletionCallback callback;
int rv = reader->GetLength(callback.callback());
return callback.GetResult(rv);
}
int WriteStringToWriter(FileStreamWriter* writer, const std::string& data) {
scoped_refptr<net::StringIOBuffer> buffer =
base::MakeRefCounted<net::StringIOBuffer>(data);
scoped_refptr<net::DrainableIOBuffer> drainable =
base::MakeRefCounted<net::DrainableIOBuffer>(std::move(buffer),
data.size());
while (drainable->BytesRemaining() > 0) {
net::TestCompletionCallback callback;
int result = writer->Write(drainable.get(), drainable->BytesRemaining(),
callback.callback());
if (result == net::ERR_IO_PENDING)
result = callback.WaitForResult();
if (result <= 0)
return result;
drainable->DidConsume(result);
}
return net::OK;
}
} // namespace storage
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