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modern-cmake/chapters/testing.md
Henry Fredrick Schreiner e589556d29 Adding module
2018-04-05 14:54:25 +02:00

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# Testing
## General Testing Information
In your main CMakeLists.txt you need to add the following function call (not in a subfolder):
```cmake
enable_testing()
```
You can register targets with:
```cmake
add_test(NAME TestName COMMAND TargetName)
```
If you put something else besides a target name after COMMAND, it will register as a command line to run. It would also be valid to put the generator expression:
```cmake
add_test(NAME TestName COMMAND $<TARGET_FILE:${TESTNAME}>)
```
which would use the output location (thus, the executable) of the produced target.
## Building as part of a test
If you want to run CMake to build a project as part of a test, you can do that too (in fact, this is how CMake tests itself). For example, if your master project was called `MyProject` and you had an `examples/simple` project that could build by itself, this would look like:
```cmake
add_test(
NAME
ExampleCMakeBuild
COMMAND
"${CMAKE_CTEST_COMMAND}"
--build-and-test "${My_SOURCE_DIR}/examples/simple"
"${CMAKE_CURRENT_BINARY_DIR}/simple"
--build-generator "${CMAKE_GENERATOR}"
--test-command "${CMAKE_CTEST_COMMAND}"
)
```
## Testing Frameworks
Look at the subchapters for recipes for popular frameworks.