230 lines
7.4 KiB
C++
230 lines
7.4 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2014 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "tokenize.h"
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#include "checkassert.h"
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#include "testsuite.h"
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#include <sstream>
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extern std::ostringstream errout;
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class TestAssert : public TestFixture {
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public:
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TestAssert() : TestFixture("TestAssert") {}
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private:
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void check(
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const char code[],
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const char *filename = NULL) {
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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settings.addEnabled("style");
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settings.addEnabled("warning");
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settings.addEnabled("portability");
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settings.addEnabled("performance");
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// Tokenize..
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Tokenizer tokenizer(&settings, this);
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std::istringstream istr(code);
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tokenizer.tokenize(istr, filename ? filename : "test.cpp");
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// Check..
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CheckAssert checkAssert(&tokenizer, &settings, this);
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checkAssert.runSimplifiedChecks(&tokenizer, &settings, this);
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}
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void run() {
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TEST_CASE(assignmentInAssert);
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TEST_CASE(functionCallInAssert);
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TEST_CASE(memberFunctionCallInAssert);
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TEST_CASE(safeFunctionCallInAssert);
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}
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void safeFunctionCallInAssert() {
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check(
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"int a;\n"
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"bool b = false;\n"
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"int foo() {\n"
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" if (b) { a = 1+2 };\n"
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" return a;\n"
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"}\n"
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"assert(foo() == 3); \n"
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);
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ASSERT_EQUALS("", errout.str());
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check(
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"int foo(int a) {\n"
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" int b=a+1;\n"
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" return b;\n"
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"}\n"
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"assert(foo(1) == 2); \n"
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);
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ASSERT_EQUALS("", errout.str());
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}
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void functionCallInAssert() {
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check(
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"int a;\n"
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"int foo() {\n"
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" a = 1+2;\n"
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" return a;\n"
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"}\n"
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"assert(foo() == 3); \n"
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);
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ASSERT_EQUALS("[test.cpp:6]: (warning) Assert statement calls a function which may have desired side effects: 'foo'.\n", errout.str());
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// Ticket #4937 "false positive: Assert calls a function which may have desired side effects"
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check("struct SquarePack {\n"
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" static bool isRank1Or8( Square sq ) {\n"
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" sq &= 0x38;\n"
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" return sq == 0 || sq == 0x38;\n"
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" }\n"
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"};\n"
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"void foo() {\n"
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" assert( !SquarePack::isRank1Or8(push2) );\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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check("struct SquarePack {\n"
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" static bool isRank1Or8( Square &sq ) {\n"
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" sq &= 0x38;\n"
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" return sq == 0 || sq == 0x38;\n"
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" }\n"
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"};\n"
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"void foo() {\n"
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" assert( !SquarePack::isRank1Or8(push2) );\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (warning) Assert statement calls a function which may have desired side effects: 'isRank1Or8'.\n", errout.str());
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check("struct SquarePack {\n"
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" static bool isRank1Or8( Square *sq ) {\n"
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" *sq &= 0x38;\n"
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" return *sq == 0 || *sq == 0x38;\n"
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" }\n"
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"};\n"
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"void foo() {\n"
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" assert( !SquarePack::isRank1Or8(push2) );\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (warning) Assert statement calls a function which may have desired side effects: 'isRank1Or8'.\n", errout.str());
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check("struct SquarePack {\n"
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" static bool isRank1Or8( Square *sq ) {\n"
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" sq &= 0x38;\n"
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" return sq == 0 || sq == 0x38;\n"
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" }\n"
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"};\n"
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"void foo() {\n"
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" assert( !SquarePack::isRank1Or8(push2) );\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void memberFunctionCallInAssert() {
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check("struct SquarePack {\n"
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" void Foo();\n"
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"};\n"
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"void foo(SquarePack s) {\n"
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" assert( s.Foo(); );\n"
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"}");
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ASSERT_EQUALS("[test.cpp:5]: (warning) Assert statement calls a function which may have desired side effects: 'Foo'.\n", errout.str());
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check("struct SquarePack {\n"
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" void Foo() const;\n"
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"};\n"
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"void foo(SquarePack* s) {\n"
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" assert( s->Foo(); );\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("struct SquarePack {\n"
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" static void Foo();\n"
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"};\n"
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"void foo(SquarePack* s) {\n"
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" assert( s->Foo(); );\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("struct SquarePack {\n"
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"};\n"
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"void foo(SquarePack* s) {\n"
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" assert( s->Foo(); );\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void assignmentInAssert() {
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check("void f() {\n"
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" int a; a = 0;\n"
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" assert(a = 2);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
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check("void f(int a) {\n"
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" assert(a == 2);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("", errout.str());
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check("void f(int a, int b) {\n"
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" assert(a == 2 && b = 1);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("[test.cpp:2]: (warning) Assert statement modifies 'b'.\n", errout.str());
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check("void f() {\n"
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" int a; a = 0;\n"
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" assert(a += 2);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
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check("void f() {\n"
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" int a; a = 0;\n"
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" assert(a *= 2);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
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check("void f() {\n"
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" int a; a = 0;\n"
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" assert(a -= 2);\n"
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" return a;\n"
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"}\n"
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);
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ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
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check("void f() {\n"
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" int a = 0;\n"
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" assert(a--);\n"
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" return a;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
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}
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};
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REGISTER_TEST(TestAssert)
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