/***
* ==++==
*
* Copyright (c) Microsoft Corporation. All rights reserved. 
* 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.
*
* ==--==
* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
*
* Fuzzing tests for streams read operations that involve parsing of data.
*
* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
****/
#include "stdafx.h"

using namespace concurrency::streams;

namespace tests { namespace functional { namespace streams {

using namespace utility;
using namespace ::pplx;

SUITE(streams_fuzz_tests)
{
std::string get_fuzzed_file_path(std::string requires_str)
{
    std::string ipfile;

    if(UnitTest::GlobalSettings::Has(requires_str))
    {
        ipfile = UnitTest::GlobalSettings::Get(requires_str);
    }

    return ipfile;
}

concurrency::streams::basic_istream<char> get_input_stream(std::string requires_str)
{
    utility::string_t ipfile = utility::conversions::to_string_t(get_fuzzed_file_path(requires_str));
    concurrency::streams::basic_istream<char> ifs;

    if (true == ipfile.empty())
    {
        VERIFY_IS_TRUE(false, "Input file is empty");
        return ifs; 
    }

    ifs = concurrency::streams::file_stream<char>::open_istream(ipfile, std::ios::in).get();

    // Look for UTF-8 BOM
    if (ifs.read().get() != 0xEF || ifs.read().get() != 0xBB || ifs.read().get() != 0xBF)
    {
        VERIFY_IS_TRUE(false, "Input file encoding is not UTF-8. Test will not parse the file.");
        ifs.close().get();
    }
    return ifs;
}

TEST(fuzz_read_line, "Requires", "fuzz_read_line_ipfile", "Timeout", "600000")
{
    auto ifs = get_input_stream("fuzz_read_line_ipfile");
    if(!ifs.is_valid() || !ifs.is_open())
        return;

    size_t num_lines = 0;
    while(false == ifs.is_eof())
    {
        container_buffer<std::vector<uint8_t>> buf;
        ifs.read_line(buf).get();
        num_lines++;
    }
    ifs.close().get();
    std::wcout << U("Number of lines read:") << num_lines;
}

template <class T>
void extract(const basic_istream<char> & ifs)
{
    try
    {
       ifs.extract<T>().get();      
    }
    catch(std::exception)
    {
    }
    return;
}

TEST(fuzz_extract, "Requires", "fuzz_extract_ipfile", "Timeout", "600000")
{
    auto ifs = get_input_stream("fuzz_extract_ipfile");
    if(!ifs.is_valid() || !ifs.is_open())
        return;

    int num_lines = 0;
    while(false == ifs.is_eof())
    {
        extract<std::string>(ifs);
        extract<std::string>(ifs);
        extract<unsigned int>(ifs);
        extract<uint64_t>(ifs);
        extract<bool>(ifs);
        extract<std::string>(ifs);
        extract<int>(ifs);
        container_buffer<std::vector<uint8_t>> buf;
        ifs.read_line(buf).get();
        num_lines++;
    }
    ifs.close().get();
    std::wcout << L"Number of lines read:" << num_lines << std::endl;
}

} // SUITE(streams_fuzz_tests)

}}}