I've just learned about value-parametrized unit tests in googletest and would like to use them in my project.
I wrote a simple parametrized test.
Header:
#include <gtest/gtest.h>
namespace EnsembleClustering {
class ParametrizedGTest: public testing::TestWithParam<int> {
public:
ParametrizedGTest();
virtual ~ParametrizedGTest();
};
} /* namespace EnsembleClustering */
Source:
#include "ParametrizedGTest.h"
namespace EnsembleClustering {
ParametrizedGTest::ParametrizedGTest() {
// TODO Auto-generated constructor stub
}
ParametrizedGTest::~ParametrizedGTest() {
// TODO Auto-generated destructor stub
}
TEST_P(ParametrizedGTest, testParameter) {
int n = GetParam();
EXPECT_EQ(n, GetParam());
}
INSTANTIATE_TEST_CASE_P(ParametrizedGTestInstance,
ParametrizedGTest,
::testing::Values(100));
} /* namespace EnsembleClustering */
Now, when I run googletest as usual, the program crashes without any output. The gdb stack trace is
EnsembleClustering-D [C/C++ Application]
EnsembleClustering
Thread [1] (Suspended : Signal : EXC_BAD_ACCESS:Could not access memory)
__gnu_debug::_Safe_sequence_base::_M_attach_single() at 0x100528add
__gnu_debug::_Safe_sequence_base::_M_attach() at 0x100528a74
__gnu_debug::_Safe_iterator_base::_M_attach() at 0x100528bfe
__gnu_debug::_Safe_iterator_base::_Safe_iterator_base() at safe_base.h:90 0x1000016e9
__gnu_debug::_Safe_iterator<__gnu_cxx::__normal_iterator<testing::internal::ParameterizedTestCaseInfoBase**, std::__cxx1998::vector<testing::internal::ParameterizedTestCaseInfoBase*, std::allocator<testing::internal::ParameterizedTestCaseInfoBase*> > >, std::__debug::vector<testing::internal::ParameterizedTestCaseInfoBase*, std::allocator<testing::internal::ParameterizedTestCaseInfoBase*> > >::_Safe_iterator() at safe_iterator.h:154 0x100002e9c
std::__debug::vector<testing::internal::ParameterizedTestCaseInfoBase*, std::allocator<testing::internal::ParameterizedTestCaseInfoBase*> >::begin() at vector:207 0x100001fbe
testing::internal::ParameterizedTestCaseRegistry::GetTestCasePatternHolder<EnsembleClustering::ParametrizedGTest>() at gtest-param-util.h:574 0x1000025b0
EnsembleClustering::ParametrizedGTest_testParameter_Test::AddToRegistry() at ParametrizedGTest.cpp:22 0x100001d3f
__static_initialization_and_destruction_0() at ParametrizedGTest.cpp:22 0x100001349
_GLOBAL__sub_I_ParametrizedGTest.cpp() at ParametrizedGTest.cpp:32 0x100001424
<...more frames...>
gdb
Am I doing something wrong or is this a bug in googletest? Can you reproduce this error?
EDIT: I am on Mac OS X 10.8.
From looking at the source code of gtest the only case if there are no parametrized tests available is on Windows using VC7.1 with disabled exceptions:
// We don't support MSVC 7.1 with exceptions disabled now. Therefore
// all the compilers we care about are adequate for supporting
// value-parameterized tests.
#define GTEST_HAS_PARAM_TEST 1
So, you'll need to check how your MinGW was built and probably update it? And can you run the gtest unit tests to see if they execute the typed parameters test?
More information on MinGW:
On their FAQ they report that when using MinGW the following compile option for building gtest is required: PATH/TO/configure CC="gcc -mno-cygwin" CXX="g++ -mno-cygwin"
.
Complete Example:
#include <gtest/gtest.h>
namespace EnsembleClustering {
class ParametrizedGTest: public testing::TestWithParam<int> {
public:
ParametrizedGTest();
virtual ~ParametrizedGTest();
};
ParametrizedGTest::ParametrizedGTest() {
}
ParametrizedGTest::~ParametrizedGTest() {
}
TEST_P(ParametrizedGTest, testParameter) {
int n = GetParam();
EXPECT_EQ(n, GetParam());
}
INSTANTIATE_TEST_CASE_P(ParametrizedGTestInstance,
ParametrizedGTest,
::testing::Values(100));
} /* namespace EnsembleClustering */
int main(int argc, char* argv[]) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
I compiled this code using the following compiler call on Mac OS X 10.8:
g++ -IGTEST_INCLUDE_DIR -LGTEST_LIB_DIR -lgtest -o tt2 tt2.cpp
Where GTEST_INCLUDE_DIR
and GTEST_LIB_DIR
are the path where header and library files are stored. When you compile and execute, what happens?