first try with CppUnit: undefined reference to `TestCalculator::TestCalculator()

[longii]

Hi,

I'm a newcomer to CppUnit and for that, I followed a basic introduction at http://linuxtortures.blogspot.de/2012/04/unit-testing-with-cppunit-and-eclipse.html

Unfortunately at the linking stage I get the error
undefined reference to `TestCalculator::TestCalculator()
Seems to be related to linking, but I have no clue why.

Any help is appreciated! Many thanks!!!

IDE is Eclipse

11:58:57 * Incremental Build of configuration Debug for project CppUnit_Test_no1 *
Info: Internal Builder is used for build
g++ "-LC:\Users\jumo\.eclipse\cppunit-1.12.1\src\cppunit\.libs" -o CppUnit_Test_no1.exe "src\Test_MainRunner.o" "src\TestCalculator.o" "src\Calculator.o" -lcppunit
src\Test_MainRunner.o: In function main': C:\Users\jumo\workspace\CppUnit_Test_no1\Debug/../src/Test_MainRunner.cpp:36: undefined reference toTestCalculator::TestCalculator()'

Test_MainRunner.cpp:

int main() {
cout << "CppUnit My Test no1" << endl;
CppUnit::TextUi::TestRunner runner;
runner.addTest( new TestCalculator() ); <== here the error comes
...

TestCalculator.h:

...
class TestCalculator : public CppUnit::TestCase {
public:
TestCalculator();
virtual ~TestCalculator();
void runTest() {
Calculator myCalculator;
CPPUNIT_ASSERT( myCalculator.add(3,6)==9 );
}
...

TestCalculator.cpp

inline TestCalculator::TestCalculator() {}

[longii]

Problem solved: missing declaration (not related anyhow to CppUnit)

wrong:
class Calculator {
public:
Calculator();
...

correct:
class Calculator {
public:
Calculator(){};
...