[SOLVED] ctest complains "No test configuration file found!"

ctest complains "No test configuration file found!"

With CMake I try to execute a simple test using CTest. I have this configuration all in one directory (${CMAKE_SOURCE_DIR}):

~$ cat hello.cpp
#include <iostream>

int main() {
    std::cout << "hello world\n";
    return(0);
}

~$ cat CMakeLists.txt
cmake_minimum_required(VERSION 3.18)
project(TEST_CTEST)

enable_testing()
add_executable(test_ctest hello.cpp)
add_test(my_test ./build/test_ctest)

Then I execute:

~$ rm -rf Testing/ build/
~$ cmake -S . -B build
~$ cmake --build build
~$ ./build/test_ctest
hello world

~$ ctest
*********************************
No test configuration file found!
*********************************
Usage

  ctest [options]

The only hint I have found in other Q&A is to place enable_testing() into the root CMakeLists.txt. I feel like I just missed a little thing, but I can't find what.

How do I run a test with CTest?

Solution

The answer from @Tsyvarev is not entierly true. You have to execute ctest not only from the build directory, but also from the relative folder inside your build-directory, where enable_testing() was called relatively to the CMAKE_SOURCE_DIR directory.

So, e.g. when the CMakeLists.txt, which calls enable_testing() is located at proj/tests and your build directory is proj/build. Then you have to run ctest in proj/build/tests.