cppcheck/test/testastutils.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2017 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/>.
*/
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#include "astutils.h"
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#include "settings.h"
#include "testsuite.h"
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#include "token.h"
#include "tokenize.h"
#include "tokenlist.h"
class TestAstUtils : public TestFixture {
public:
TestAstUtils() : TestFixture("TestAstUtils") {
}
private:
void run() {
TEST_CASE(isReturnScope);
TEST_CASE(isVariableChanged);
TEST_CASE(isVariableChangedByFunctionCall);
}
bool isReturnScope(const char code[], int offset) {
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Settings settings;
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
const Token * const tok = (offset < 0)
? tokenizer.list.back()->tokAt(1+offset)
: tokenizer.tokens()->tokAt(offset);
return ::isReturnScope(tok);
}
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void isReturnScope() {
ASSERT_EQUALS(true, isReturnScope("void f() { if (a) { return; } }", -2));
ASSERT_EQUALS(true, isReturnScope("void f() { if (a) { return (ab){0}; } }", -2)); // #7103
ASSERT_EQUALS(false, isReturnScope("void f() { if (a) { return (ab){0}; } }", -4)); // #7103
ASSERT_EQUALS(true, isReturnScope("void f() { if (a) { {throw new string(x);}; } }", -4)); // #7144
ASSERT_EQUALS(true, isReturnScope("void f() { if (a) { {throw new string(x);}; } }", -2)); // #7144
}
bool isVariableChanged(const char code[], const char startPattern[], const char endPattern[]) {
Settings settings;
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
const Token * const tok1 = Token::findsimplematch(tokenizer.tokens(), startPattern);
const Token * const tok2 = Token::findsimplematch(tokenizer.tokens(), endPattern);
return ::isVariableChanged(tok1,tok2,1,false,&settings,true);
}
void isVariableChanged() {
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// #8211 - no lhs for >> , do not crash
isVariableChanged("void f() {\n"
" int b;\n"
" if (b) { (int)((INTOF(8))result >> b); }\n"
"}", "if", "}");
}
bool isVariableChangedByFunctionCall(const char code[], const char pattern[], bool *inconclusive) {
Settings settings;
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
const Token * const argtok = Token::findmatch(tokenizer.tokens(), pattern);
return ::isVariableChangedByFunctionCall(argtok, &settings, inconclusive);
}
void isVariableChangedByFunctionCall() {
const char *code;
bool inconclusive;
// #8271 - template method
code = "void f(int x) {\n"
" a<int>(x);\n"
"}";
inconclusive = false;
ASSERT_EQUALS(false, isVariableChangedByFunctionCall(code, "x ) ;", &inconclusive));
ASSERT_EQUALS(true, inconclusive);
}
};
REGISTER_TEST(TestAstUtils)