In order to add test cases in CMake, you can use the add_test function provided by CMake. This function allows you to specify a name for the test case, as well as the command to run the test. You can add test cases to your CMake project by calling the add_test function in your CMakeLists.txt file. This will add the test case to CMake's testing framework, and you can then run the test cases using the ctest command. By adding test cases to your CMake project, you can ensure that your code is thoroughly tested and identify any bugs or issues early in the development process.
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How to group test cases in CMake?
In CMake, test cases can be grouped by using the ctest_add_tests command. This command allows you to group together multiple test cases and specify a name for the test group. Here is an example of how you can use ctest_add_tests to group test cases in CMake:
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# Add test cases add_test(test_case_1 test_case_1) add_test(test_case_2 test_case_2) add_test(test_case_3 test_case_3) # Group test cases set(test_group_name "Group_Name") set(test_list test_case_1 test_case_2 test_case_3) ctest_add_tests(TEST_GROUP ${test_group_name} COMMAND "" ${test_list}) |
In this example, we first define three test cases test_case_1, test_case_2, and test_case_3 using the add_test command. Then, we create a list test_list containing the names of the test cases we want to group together. Finally, we use ctest_add_tests to group the test cases in test_list under the name Group_Name.
You can run the grouped test cases with the following command:
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ctest -R Group_Name
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This will run all the test cases in the group Group_Name.
How to pass command-line arguments to a test case in CMake?
To pass command-line arguments to a test case in CMake, you can use the add_test command along with the COMMAND option. Here is an example:
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# Add a test case with command-line arguments add_test( NAME my_test COMMAND my_test_executable arg1 arg2 arg3 ) |
In this example, my_test_executable is the executable file for the test case and arg1, arg2, and arg3 are the command-line arguments that will be passed to the test case. You can replace these with your own executable file and arguments.
You can also use variables or generator expressions to set command-line arguments dynamically. For example:
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set(MY_TEST_ARGS arg1 arg2 arg3) add_test( NAME my_test COMMAND my_test_executable ${MY_TEST_ARGS} ) |
In this case, the MY_TEST_ARGS variable contains the command-line arguments that will be passed to the test case.
Remember to build and run your test cases using the ctest command after generating the build system with CMake.
How to organize test binaries in CMake?
One common way to organize test binaries in CMake is to create a separate CMake target for each test binary. You can use the add_executable() function to create an executable for each test binary, and then use the target_link_libraries() function to link the necessary libraries to each test binary.
Here is an example of how you can organize test binaries in CMake:
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# Add test executables add_executable(test1 test1.cpp) target_link_libraries(test1 my_library) add_executable(test2 test2.cpp) target_link_libraries(test2 my_library) # Define tests add_test(NAME test1 COMMAND test1) add_test(NAME test2 COMMAND test2) |
In this example, we have two test binaries test1 and test2, which are built from test1.cpp and test2.cpp respectively. We link the my_library library to each test binary using target_link_libraries(). Finally, we define the tests using the add_test() function, specifying the test binary as the command to run for each test.
By organizing your test binaries in this way, you can easily add new tests as separate CMake targets, making it easy to maintain and update your test suite.
How to add dependencies between test cases in CMake?
To add dependencies between test cases in CMake, you can use the add_dependencies function. Here's an example of how you can do this:
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# Create test cases add_test(test_case1 test_case1) add_test(test_case2 test_case2) add_test(test_case3 test_case3) # Add dependencies between test cases add_dependencies(test_case2 test_case1) add_dependencies(test_case3 test_case2) |
In this example, test_case2 depends on test_case1, and test_case3 depends on test_case2. This means that when you run test_case3, CMake will ensure that test_case2 has been run first, and when you run test_case2, CMake will ensure that test_case1 has been run first.
You can add as many dependencies as needed between test cases by adding more add_dependencies calls.
How to customize the output format for test results in CMake?
You can customize the output format for test results in CMake by using the CTEST_CUSTOM_MAXIMUM_COVER_TIME variable. This variable allows you to set the maximum time that a test can take before it is considered to have timed out. You can set this variable in your CMakeLists.txt file like this:
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set(CTEST_CUSTOM_MAXIMUM_COVER_TIME 60)
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This will set the maximum test time to 60 seconds. You can also customize other test result settings by using other variables such as CTEST_CUSTOM_PRE_TEST and CTEST_CUSTOM_POST_TEST. These variables allow you to specify commands to run before and after each test, allowing you to customize the test environment as needed.
Additionally, you can use the ctest command-line tool to run your tests and view the results in various formats. For example, you can use the -VV flag to display more detailed test output, or the -T flag to display test results in a tabular format. You can also use the --output-on-failure flag to only display test output when a test fails.
Overall, by using these variables and command-line options, you can customize the output format for test results in CMake to suit your needs.
How to set up parallel testing in CMake?
To set up parallel testing in CMake, you can use the add_test command to define each test in your CMakeLists.txt file and then use the add_custom_target command to group these tests together as a test suite. Here's an example of how you can set up parallel testing in CMake:
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# Define your test cases add_test(NAME test1 COMMAND my_test1) add_test(NAME test2 COMMAND my_test2) add_test(NAME test3 COMMAND my_test3) # Create a test suite add_custom_target(my_tests) add_dependencies(my_tests test1 test2 test3) # Set the test properties set_tests_properties(test1 test2 test3 PROPERTIES RUN_SERIAL FALSE) |
In this example, my_test1, my_test2, and my_test3 are the executables for your test cases. The add_test command is used to define each test case, and the add_custom_target command is used to group these tests together as a test suite named my_tests. The add_dependencies command is used to specify the dependencies of the my_tests target, which are the individual test cases.
Finally, the set_tests_properties command is used to set the RUN_SERIAL property to FALSE for each test case, which allows CTest to run the test cases in parallel.
After setting up your CMake file with the parallel testing configuration, you can run your tests using CTest by running ctest -j<N>, where <N> is the number of parallel testing jobs you want to run.
