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/*
* libnbt++ - A library for the Minecraft Named Binary Tag format.
* Copyright (C) 2013, 2015 ljfa-ag
*
* This file is part of libnbt++.
*
* libnbt++ is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libnbt++ 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
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libnbt++. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cxxtest/TestSuite.h>
#include "io/stream_reader.h"
#include "nbt_tags.h"
#include <iostream>
#include <fstream>
#include <sstream>
using namespace nbt;
class read_test : public CxxTest::TestSuite
{
public:
void test_stream_reader_big()
{
std::string input{
1, //tag_type::Byte
0, //tag_type::End
11, //tag_type::Int_Array
0x0a, 0x0b, 0x0c, 0x0d, //0x0a0b0c0d in Big Endian
0x00, 0x06, //String length in Big Endian
'f', 'o', 'o', 'b', 'a', 'r',
0 //tag_type::End (invalid with allow_end = false)
};
std::istringstream is(input);
nbt::io::stream_reader reader(is);
TS_ASSERT_EQUALS(&reader.get_istr(), &is);
TS_ASSERT_EQUALS(reader.get_endian(), endian::big);
TS_ASSERT_EQUALS(reader.read_type(), tag_type::Byte);
TS_ASSERT_EQUALS(reader.read_type(true), tag_type::End);
TS_ASSERT_EQUALS(reader.read_type(false), tag_type::Int_Array);
int32_t i;
reader.read_num(i);
TS_ASSERT_EQUALS(i, 0x0a0b0c0d);
TS_ASSERT_EQUALS(reader.read_string(), "foobar");
TS_ASSERT_THROWS(reader.read_type(false), io::input_error);
TS_ASSERT(!is);
is.clear();
//Test for invalid tag type 12
is.str("\x0c");
TS_ASSERT_THROWS(reader.read_type(), io::input_error);
TS_ASSERT(!is);
is.clear();
//Test for unexpcted EOF on numbers (input too short for int32_t)
is.str("\x03\x04");
reader.read_num(i);
TS_ASSERT(!is);
}
void test_stream_reader_little()
{
std::string input{
0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, //0x0d0c0b0a09080706 in Little Endian
0x06, 0x00, //String length in Little Endian
'f', 'o', 'o', 'b', 'a', 'r',
0x10, 0x00, //String length (intentionally too large)
'a', 'b', 'c', 'd' //unexpected EOF
};
std::istringstream is(input);
nbt::io::stream_reader reader(is, endian::little);
TS_ASSERT_EQUALS(reader.get_endian(), endian::little);
int64_t i;
reader.read_num(i);
TS_ASSERT_EQUALS(i, 0x0d0c0b0a09080706);
TS_ASSERT_EQUALS(reader.read_string(), "foobar");
TS_ASSERT_THROWS(reader.read_string(), io::input_error);
TS_ASSERT(!is);
}
//Tests if comp equals an extended variant of Notch's bigtest NBT
void verify_bigtest_structure(const tag_compound& comp)
{
TS_ASSERT_EQUALS(comp.size(), 13u);
TS_ASSERT(comp.at("byteTest") == tag_byte(127));
TS_ASSERT(comp.at("shortTest") == tag_short(32767));
TS_ASSERT(comp.at("intTest") == tag_int(2147483647));
TS_ASSERT(comp.at("longTest") == tag_long(9223372036854775807));
TS_ASSERT(comp.at("floatTest") == tag_float(std::stof("0xff1832p-25"))); //0.4982315
TS_ASSERT(comp.at("doubleTest") == tag_double(std::stod("0x1f8f6bbbff6a5ep-54"))); //0.493128713218231
//From bigtest.nbt: "the first 1000 values of (n*n*255+n*7)%100, starting with n=0 (0, 62, 34, 16, 8, ...)"
tag_byte_array byteArrayTest;
for(int n = 0; n < 1000; ++n)
byteArrayTest.push_back((n*n*255 + n*7) % 100);
TS_ASSERT(comp.at("byteArrayTest (the first 1000 values of (n*n*255+n*7)%100, starting with n=0 (0, 62, 34, 16, 8, ...))") == byteArrayTest);
TS_ASSERT(comp.at("stringTest") == tag_string("HELLO WORLD THIS IS A TEST STRING \u00C5\u00C4\u00D6!"));
TS_ASSERT(comp.at("listTest (compound)") == tag_list::of<tag_compound>({
{{"created-on", tag_long(1264099775885)}, {"name", "Compound tag #0"}},
{{"created-on", tag_long(1264099775885)}, {"name", "Compound tag #1"}}
}));
TS_ASSERT(comp.at("listTest (long)") == tag_list::of<tag_long>({11, 12, 13, 14, 15}));
TS_ASSERT(comp.at("listTest (end)") == tag_list());
TS_ASSERT((comp.at("nested compound test") == tag_compound{
{"egg", tag_compound{{"value", 0.5f}, {"name", "Eggbert"}}},
{"ham", tag_compound{{"value", 0.75f}, {"name", "Hampus"}}}
}));
TS_ASSERT(comp.at("intArrayTest") == tag_int_array(
{0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f}));
}
void test_read_bigtest()
{
//Uses an extended variant of Notch's original bigtest file
std::ifstream file("bigtest_uncompr", std::ios::binary);
TS_ASSERT(file);
auto pair = nbt::io::read_compound(file);
TS_ASSERT_EQUALS(pair.first, "Level");
verify_bigtest_structure(*pair.second);
}
void test_read_littletest()
{
//Same as bigtest, but little endian
std::ifstream file("littletest_uncompr", std::ios::binary);
TS_ASSERT(file);
auto pair = nbt::io::read_compound(file, endian::little);
TS_ASSERT_EQUALS(pair.first, "Level");
TS_ASSERT_EQUALS(pair.second->get_type(), tag_type::Compound);
verify_bigtest_structure(*pair.second);
}
void test_read_errors()
{
std::ifstream file;
nbt::io::stream_reader reader(file);
//EOF within a tag_double payload
file.open("errortest_eof1", std::ios::binary);
TS_ASSERT(file);
TS_ASSERT_THROWS(reader.read_tag(), io::input_error);
TS_ASSERT(!file);
//EOF within a key in a compound
file.close();
file.open("errortest_eof2", std::ios::binary);
TS_ASSERT(file);
TS_ASSERT_THROWS(reader.read_tag(), io::input_error);
TS_ASSERT(!file);
//Missing tag_end
file.close();
file.open("errortest_noend", std::ios::binary);
TS_ASSERT(file);
TS_ASSERT_THROWS(reader.read_tag(), io::input_error);
TS_ASSERT(!file);
//Negative list length
file.close();
file.open("errortest_neg_length", std::ios::binary);
TS_ASSERT(file);
TS_ASSERT_THROWS(reader.read_tag(), io::input_error);
TS_ASSERT(!file);
}
void test_read_misc()
{
std::ifstream file;
nbt::io::stream_reader reader(file);
//Toplevel tag other than compound
file.open("toplevel_string", std::ios::binary);
TS_ASSERT(file);
TS_ASSERT_THROWS(reader.read_compound(), io::input_error);
TS_ASSERT(!file);
//Rewind and try again with read_tag
file.clear();
TS_ASSERT(file.seekg(0));
auto pair = reader.read_tag();
TS_ASSERT_EQUALS(pair.first, "Test (toplevel tag_string)");
TS_ASSERT(*pair.second == tag_string(
"Even though unprovided for by NBT, the library should also handle "
"the case where the file consists of something else than tag_compound"));
}
};
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