cppcheck/test/testunusedfunctions.cpp

188 lines
4.8 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 Daniel Marjamäki and 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 "tokenize.h"
#include "testsuite.h"
#include "checkunusedfunctions.h"
#include <sstream>
extern std::ostringstream errout;
class TestUnusedFunctions : public TestFixture
{
public:
TestUnusedFunctions() : TestFixture("TestUnusedFunctions")
{ }
private:
void run()
{
TEST_CASE(incondition);
TEST_CASE(return1);
TEST_CASE(return2);
TEST_CASE(callback1);
TEST_CASE(else1);
TEST_CASE(functionpointer);
TEST_CASE(template1);
TEST_CASE(throwIsNotAFunction);
TEST_CASE(unusedError);
TEST_CASE(initializationIsNotAFunction);
}
void check(const char code[])
{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Clear the error buffer..
errout.str("");
// Check for unused functions..
Settings settings;
settings._checkCodingStyle = true;
CheckUnusedFunctions checkUnusedFunctions(&tokenizer, &settings, this);
checkUnusedFunctions.parseTokens(tokenizer);
checkUnusedFunctions.check(this);
}
void incondition()
{
check("int f1()\n"
"{\n"
" if (f1())\n"
" { }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void return1()
{
check("int f1()\n"
"{\n"
" return f1();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void return2()
{
check("char * foo()\n"
"{\n"
" return *foo();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void callback1()
{
check("void f1()\n"
"{\n"
" void (*f)() = cond ? f1 : NULL;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void else1()
{
check("void f1()\n"
"{\n"
" if (cond) ;\n"
" else f1();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void functionpointer()
{
check("namespace abc {\n"
"void foo() { }\n"
"};\n"
"\n"
"int main()\n"
"{\n"
" f(&abc::foo);\n"
" return 0\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("namespace abc {\n"
"void foo() { }\n"
"};\n"
"\n"
"int main()\n"
"{\n"
" f = &abc::foo;\n"
" return 0\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void template1()
{
check("template<class T> void foo() { }\n"
"\n"
"int main()\n"
"{\n"
" foo<int>();\n"
" return 0\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void throwIsNotAFunction()
{
check("struct A {void f() const throw () {}}; int main() {A a; a.f();}\n");
ASSERT_EQUALS("", errout.str());
}
void unusedError()
{
check("void foo() {}\n"
"int main()\n");
ASSERT_EQUALS("[test.cpp:1]: (style) The function 'foo' is never used\n", errout.str());
check("void foo() const {}\n"
"int main()\n");
ASSERT_EQUALS("[test.cpp:1]: (style) The function 'foo' is never used\n", errout.str());
check("void foo() const throw() {}\n"
"int main()\n");
ASSERT_EQUALS("[test.cpp:1]: (style) The function 'foo' is never used\n", errout.str());
check("void foo() throw() {}\n"
"int main()\n");
ASSERT_EQUALS("[test.cpp:1]: (style) The function 'foo' is never used\n", errout.str());
}
void initializationIsNotAFunction()
{
check("struct B: N::A {\n"
" B(): N::A() {};\n"
"};\n");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestUnusedFunctions)