I have the following CMakeLists.txt file:
cmake_minimum_required(VERSION 3.16)
project(first_coverage)
set(CXX_STANDARD 20)
set(CXX_STANDARD_REQUIRED True)
set(CMAKE_BUILD_TYPE Debug)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(CMAKE_CXX_OUTPUT_EXTENSION_REPLACE ON)
include (FetchContent)
enable_testing()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --coverage -O0 -fprofile-arcs -fprofile-abs-path -ftest-coverage -fno-inline -fno-inline-small-functions -fno-default-inline")
file(GLOB_RECURSE sources "src/**.cpp")
file(GLOB_RECURSE test_cases "test/**.cpp")
message(flags: ${CMAKE_CXX_FLAGS})
add_library(first_coverage_deps INTERFACE)
target_link_libraries(first_coverage_deps INTERFACE
${CONAN_LIBS}
)
target_compile_options(first_coverage_deps INTERFACE
-Werror=return-type
-Werror=unused
-Werror=pessimizing-move
-Werror=redundant-move
)
target_include_directories(first_coverage_deps
INTERFACE src
INTERFACE external
)
add_library(first_coverage
${sources}
)
set(FETCHCONTENT_BASE_DIR "${CMAKE_SOURCE_DIR}/external/")
FetchContent_Declare(
googletest
URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
)
FetchContent_MakeAvailable(googletest)
add_executable(first_coverage_test
${test_cases}
)
target_link_libraries(first_coverage first_coverage_deps)
target_link_libraries(first_coverage_test first_coverage gtest_main)
include(GoogleTest)
gtest_discover_tests(first_coverage_test)
and a src folder with a header and a source file: QuickMaths.hpp:
#include <cstdint>
using size_t = std::size_t;
size_t
multiply(size_t a, size_t b);
inline size_t
add(size_t a, size_t b)
{
return a + b;
}
class QuickMaths
{
public:
size_t operator*() const;
friend QuickMaths operator+(QuickMaths const&, QuickMaths const&);
QuickMaths(size_t x);
private:
size_t x;
};
and
#include "QuickMaths.hpp"
size_t
multiply(size_t a, size_t b)
{
return a * b;
}
size_t
QuickMaths::operator*() const
{
return x;
}
QuickMaths::QuickMaths(size_t x)
: x(x)
{}
QuickMaths
operator+(QuickMaths const& a, QuickMaths const& b)
{
return a.x + b.x;
}
I have a test folder with a QuickMaths.cpp file:
#include <gtest/gtest.h>
#include <QuickMaths.hpp>
TEST(AddTest, shouldAdd)
{
EXPECT_EQ(add(1UL, 1UL), 2UL);
}
TEST(MultiplyTest, shouldMultiply)
{
EXPECT_EQ(multiply(2UL, 4UL), 8UL);
}
TEST(QuickMathTest, haveValue)
{
auto v = QuickMaths{ 4UL };
EXPECT_EQ(*v, 4UL);
}
Steps I use to build the project, run test, generate coverage are as following:
mkdir external && mkdir build && cd build
cmake ../
make && make test
gcovr -r ../ .
It successfully creates coverage output, however the coverage only shows executed lines for the external/gtest as well as the file in test, but shows 0 lines executed for the files that I really want to test, which are the header and the source-file in the src directory.
The output of make test is as follows:
Running tests...
Test project /home/pete/dev/sandbox/coverage_sbs/first_coverage/build
Start 1: AddTest.shouldAdd
1/3 Test #1: AddTest.shouldAdd ................ Passed 0.01 sec
Start 2: MultiplyTest.shouldMultiply
2/3 Test #2: MultiplyTest.shouldMultiply ...... Passed 0.00 sec
Start 3: QuickMathTest.haveValue
3/3 Test #3: QuickMathTest.haveValue .......... Passed 0.00 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 0.03 sec
And here's the output of gcovr -r ../ .
------------------------------------------------------------------------------
GCC Code Coverage Report
Directory: ../
------------------------------------------------------------------------------
File Lines Exec Cover Missing
------------------------------------------------------------------------------
external/googletest-src/googletest/include/gtest/gtest-printers.h
20 0 0% 212,215,306,312,333-334,413,415,440-441,665,674,833-834,902,906,942-945
external/googletest-src/googletest/include/gtest/gtest.h
17 0 0% 324,333-334,337,427,435,440-441,522,1522,1529,1541,1545-1546,1549,1561,1564
external/googletest-src/googletest/include/gtest/internal/gtest-internal.h
19 1 5% 454,461,493-494,506,508,521,525,527,529,532,534,542,546,548,550,553,555
external/googletest-src/googletest/include/gtest/internal/gtest-port.h
1 0 0% 970
src/QuickMaths.cpp 8 0 0% 4,6,10,12,15-16,20,22
src/QuickMaths.hpp 2 0 0% 9,11
test/QuickMaths.cpp 7 3 42% 7,12,17-18
------------------------------------------------------------------------------
TOTAL 74 4 5%
------------------------------------------------------------------------------
How do I get the coverage to be correctly recognized for these files?
