CppUnit, very simple test code crashed, why?
I am learning CppUnit, and my code coredumped when calling TestRunner::run(). That's line 34 in the below code. I can not see anything wrong. It is almost identical to the sample code in the CppUnit cookbook.
#include <iostream>
#include <cppunit/TestCaller.h>
#include <cppunit/TestSuite.h>
#include <cppunit/ui/text/TestRunner.h>
using namespace std;
//class MyFixture: public CppUnit::TestFixture {
class MyFixture{
public:
MyFixture() {cout<<"MyFixture:: ctor()"<<endl;}
~MyFixture() {cout<<"MyFixture:: dtor()"<<endl;}
void setUp() {cout<<"MyFixture::Setup()"<<endl;}
void tearDown() {cout<<"MyFixture::tearDown()"<<endl;}
void testFunc1() {cout<<"MyFixture::testFunc1()"<<endl; m=1; CPPUNIT_ASSERT(m==1);}
void testFunc2() {cout<<"MyFixture::testFunc2()"<<endl; m=2;}
int m;
static CppUnit::TestSuite * CreateSuite();
};
CppUnit::TestSuite * MyFixture::CreateSuite()
{
CppUnit::TestSuite * suite = new CppUnit::TestSuite("My TestSuite for MyFixture");
suite->addTest(new CppUnit::TestCaller<MyFixture>("MyFixture::testFunc1", &MyFixture::testFunc1));
suite->addTest(new CppUnit::TestCaller<MyFixture>("MyFixture::testFunc2", &MyFixture::testFunc2));
}
int main()
{
cout<<"point 1000"<<endl;
CppUnit::TextUi::TestRunner runner;
runner.addTest(MyFixture::CreateSuite());
cout<<"point 7000"<<endl;
/*Line34*/ runner.run();
cout<<"point 8000"<<endl;
}
The output:
cppunit$ ./test_runner
point 1000
MyFixture:: ctor()
MyFixture:: ctor()
point 7000
Segmentation fault (core dumped)
The stack trace:
(gdb)bt
-0 0x00733cc9 in CppUnit::TestRunner::WrappingSuite::run(CppUnit::TestResult*) ()
from /usr/lib/libcppunit-1.12.so.1
-1 0x0073170a in CppUnit::TestResult::runTest(CppUnit::Test*) () from /usr/lib/libcppunit-1.12.so.1
-2 0x00733af0 in CppUnit::TestRunner::run(CppUnit::TestResult&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) () from /usr/lib/libcppunit-1.12.so.1
-3 0x00736d2b in CppUnit::TextTestRunner::run(CppUnit::TestResult&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) () from /usr/lib/libcppunit-1.12.so.1
-4 0x00736da2 in CppUnit::TextTestRunner::run(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, bool, bool) () from /usr/lib/libcppunit-开发者_如何学Go1.12.so.1
-5 0x080494dd in main () at test_runner.cpp:34
The compile line: g++ -g -o -Wall test_runner test_runner.cpp -lcppunit
It compile successfully without any warning. If I turned on "-Wall", it gave error:......
(.data+0x4): multiple definition of `__dso_handle'
/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.2/crtbegin.o:(.data+0x0): first defined here
test_runner: In function `_init':
(.init+0x0): multiple definition of `_init'
/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.2/../../../crti.o:(.init+0x0): first defined here
/tmp/ccgzqvu9.o: In function `MyFixture::CreateSuite()':
/home/fzhao/temp/cppunit/test_runner.cpp:22: multiple definition of `MyFixture::CreateSuite()'
test_runner:/home/fzhao/temp/cppunit/test_runner.cpp:22: first defined here
/tmp/ccgzqvu9.o: In function `main':
/home/fzhao/temp/cppunit/test_runner.cpp:29: multiple definition of `main'
test_runner:/home/fzhao/temp/cppunit/test_runner.cpp:29: first defined here
/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.2/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__'
test_runner:(.dtors+0x4): first defined here
/usr/bin/ld: warning: Cannot create .eh_frame_hdr section, --eh-frame-hdr ignored.
/usr/bin/ld: error in test_runner(.eh_frame); no .eh_frame_hdr table will be created.
collect2: ld returned 1 exit status
make: *** [test_runner] Error 1
Given that the signature for the function is:
CppUnit::TestSuite * MyFixture::CreateSuite()
shouldn't you be returning something (suite
would be my first guess)?
By not returning anything, the line:
runner.addTest(MyFixture::CreateSuite());
is going to add a very dodgy pointer to your runner
.
And the reason you're probably getting those errors when you insert -Wall
is because:
g++ -g -o -Wall test_runner test_runner.cpp -lcppunit
\______/ \___________________________________/
will try to output your executable to the file -Wall
by linking together test_runner
, test_runner.cpp
and the cppunit
library. Perhaps you meant to type:
g++ -g -Wall -o test_runner test_runner.cpp -lcppunit
\____________/ \_______________________/
(I'm assuming here that the compile line you gave was the one where the errors occurred since it actually has -Wall
in it ).
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