cppcheck/test/testbughuntingchecks.cpp

100 lines
3.0 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2020 Cppcheck team.
*
* 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/>.
*/
#include "config.h"
#include "exprengine.h"
#include "settings.h"
#include "tokenize.h"
#include "testsuite.h"
class TestBughuntingChecks : public TestFixture {
public:
TestBughuntingChecks() : TestFixture("TestBughuntingChecks") {
}
private:
void run() OVERRIDE {
#ifdef USE_Z3
TEST_CASE(uninit);
TEST_CASE(ctu);
#endif
}
void check(const char code[]) {
Settings settings;
settings.platform(cppcheck::Platform::Unix64);
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
errout.str("");
ExprEngine::runChecks(this, &tokenizer, &settings);
}
void uninit() {
check("void foo() { int x; x = x + 1; }");
ASSERT_EQUALS("[test.cpp:1]: (error) Cannot determine that 'x' is initialized\n", errout.str());
check("void foo() { int x; int y = x + 1; }");
ASSERT_EQUALS("[test.cpp:1]: (error) Cannot determine that 'x' is initialized\n", errout.str());
check("void foo() { int x; x++; }");
ASSERT_EQUALS("[test.cpp:1]: (error) Cannot determine that 'x' is initialized\n", errout.str());
}
void ctu() {
check("void init(int &x) {\n"
" x = 1;\n"
"}\n"
"\n"
"void foo() {\n"
" int x;\n"
" init(x);\n"
" x++;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void init(int a, int &x) {\n"
" if (a < 10)\n"
" x = 1;\n"
"}\n"
"\n"
"void foo(int a) {\n"
" int x;\n"
" init(a, x);\n"
" x++;\n"
"}");
ASSERT_EQUALS("[test.cpp:9]: (error) Cannot determine that 'x' is initialized\n", errout.str());
check("void init(int a, int &x) {\n"
" if (a < 10)\n"
" x = 1;\n"
" else\n"
" x = 3;\n"
"}\n"
"\n"
"void foo(int a) {\n"
" int x;\n"
" init(a, x);\n"
" x++;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestBughuntingChecks)