cppcheck/test/testcharvar.cpp

108 lines
2.8 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam,
* Leandro Penz, Kimmo Varis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/
*/
#define UNIT_TESTING
#include "../src/tokenize.h"
#include "../src/checkother.h"
#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
class TestCharVar : public TestFixture
{
public:
TestCharVar() : TestFixture("TestCharVar")
{ }
private:
void run()
{
TEST_CASE(array_index);
TEST_CASE(bitop1);
TEST_CASE(bitop2);
}
void check(const char code[])
{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
// Clear the error buffer..
errout.str("");
// Check char variable usage..
CheckOther checkOther(&tokenizer, Settings(), this);
checkOther.CheckCharVariable();
}
void array_index()
{
check("void foo()\n"
"{\n"
" unsigned char ch = 0x80;\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS(std::string(""), errout.str());
check("void foo()\n"
"{\n"
" char ch = 0x80;\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS(std::string("[test.cpp:4]: Warning - using char variable as array index\n"), errout.str());
check("void foo(char ch)\n"
"{\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS(std::string("[test.cpp:3]: Warning - using char variable as array index\n"), errout.str());
}
void bitop1()
{
check("void foo()\n"
"{\n"
" char ch;\n"
" result = a | ch;\n"
"}\n");
ASSERT_EQUALS(std::string("[test.cpp:4]: Warning - using char variable in bit operation\n"), errout.str());
}
void bitop2()
{
check("void foo()\n"
"{\n"
" char ch;\n"
" func(&ch);\n"
"}\n");
ASSERT_EQUALS(std::string(""), errout.str());
}
};
REGISTER_TEST(TestCharVar)