cppcheck/test/testunusedvar.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki and Cppcheck team.
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*
* 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/>.
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*/
// Check for unused variables..
#include "testsuite.h"
#include "../src/tokenize.h"
#include "../src/checkother.h"
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#include <sstream>
extern std::ostringstream errout;
class TestUnusedVar : public TestFixture
{
public:
TestUnusedVar() : TestFixture("TestUnusedVar")
{ }
private:
void check(const char code[])
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{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
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// Clear the error buffer..
errout.str("");
// Check for unused variables..
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Settings settings;
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.checkStructMemberUsage();
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}
void run()
{
TEST_CASE(structmember1);
TEST_CASE(structmember2);
TEST_CASE(structmember3);
TEST_CASE(structmember4);
TEST_CASE(structmember5);
TEST_CASE(structmember6);
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}
void structmember1()
{
check("struct abc\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n");
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ASSERT_EQUALS(std::string("[test.cpp:3]: (style) struct or union member 'abc::a' is never used\n"
"[test.cpp:4]: (style) struct or union member 'abc::b' is never used\n"
"[test.cpp:5]: (style) struct or union member 'abc::c' is never used\n"), errout.str());
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}
void structmember2()
{
check("struct ABC\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" struct ABC abc;\n"
" int a = abc.a;\n"
" int b = abc.b;\n"
" int c = abc.c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
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}
void structmember3()
{
check("struct ABC\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n"
"\n"
"static struct ABC abc[] = { {1, 2, 3} };\n"
"\n"
"void foo()\n"
"{\n"
" int a = abc[0].a;\n"
" int b = abc[0].b;\n"
" int c = abc[0].c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember4()
{
check("struct ABC\n"
"{\n"
" const int a;\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" ABC abc;\n"
" if (abc.a == 2);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember5()
{
check("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
" void reset()\n"
" {\n"
" a = 1;\n"
" b = 2;\n"
" }\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" struct AB ab;\n"
" ab.reset();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
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}
void structmember6()
{
check("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(char *buf)\n"
"{\n"
" struct AB *ab = (struct AB *)&buf[10];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(char *buf)\n"
"{\n"
" struct AB *ab = (AB *)&buf[10];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
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};
REGISTER_TEST(TestUnusedVar)
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