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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
/**
* Unit tests of the unittest framework itself.
*/
#include "mongo/logger/console.h"
#include "mongo/unittest/unittest.h"
#include <iostream>
#include <ostream>
#include <sstream>
#include <string>
namespace {
using std::cout;
using std::endl;
using std::ostream;
using std::string;
using std::stringstream;
TEST(ConsoleTest, testUtf8) {
// this constant should match ConsoleStreamBuffer::bufferSize in console.cpp
const size_t bufferSize = 1024U;
mongo::Console console;
ostream& out = console.out();
// example unicode code points are from:
// http://en.wikipedia.org/wiki/UTF-8#Examples
struct {
size_t length;
const char* utf8CodePoint;
} data[] = {
{2U, "\xc2\xa2"}, // U+0024
{3U, "\xe2\x82\xac"}, // U+20AC
{4U, "\xf0\xa4\xad\xa2"}, // U+24B62
{0, "unused"},
};
// generate strings with unicode point located near end of buffer
// to see how console stream handles incomplete unicode multi-byte sequences
// to see these multibtye code points in the Windows terminal, set the console font
// to Lucida. Currently the 4-byte sequence used in the test data is still not being
// displayed properly.
for (int i = 0; data[i].length > 0; i++) {
for (size_t prefixLength = 0; prefixLength <= data[i].length; prefixLength++) {
stringstream descriptionStream;
descriptionStream << "ConsoleTest::testUtf8 - checking handling of "
<< "multi-byte sequence. This line contains " << prefixLength
<< " of " << data[i].length << "-byte sequence "
<< "before the end of the console's internal " << bufferSize
<< "-byte buffer";
string description = descriptionStream.str();
size_t padLength = bufferSize - prefixLength;
string padding(padLength - description.length(), '.');
string line = description + padding + data[i].utf8CodePoint;
out << line << endl;
}
}
// check if out is std::cout
out << "ConsoleTest::testUtf8 - Console::out() is using "
<< (out.rdbuf() == cout.rdbuf() ? "std::cout" : "custom output stream") << endl;
}
} // namespace
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