Tutorial: Update step 5 style

This commit is contained in:
Markus Ferrell
2022-09-19 17:27:03 -04:00
parent cadcb6a5f0
commit 92edbce342
16 changed files with 317 additions and 61 deletions

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@@ -21,7 +21,7 @@ in ``MathFunctions/CMakeLists.txt`` to look like:
:caption: MathFunctions/CMakeLists.txt
:name: MathFunctions/CMakeLists.txt-install-TARGETS-EXPORT
:language: cmake
:start-after: # install rules
:start-after: # install libs
Now that we have ``MathFunctions`` being exported, we also need to explicitly
install the generated ``MathFunctionsTargets.cmake`` file. This is done by

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@@ -158,6 +158,7 @@ and this:
:name: MathFunctions-CMakeLists.txt-target_link_libraries-step4
:language: cmake
:start-after: # link our compiler flags interface library
:end-before: # TODO 1
.. raw:: html

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@@ -30,7 +30,7 @@ If available, use :command:`target_compile_definitions` to specify
:name: MathFunctions/CMakeLists.txt-target_compile_definitions
:language: cmake
:start-after: # add compile definitions
:end-before: # install rules
:end-before: # install libs
If ``log`` and ``exp`` are available on the system, then we will use them to
compute the square root in the ``mysqrt`` function. Add the following code to

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@@ -62,7 +62,7 @@ directories so that ``Table.h`` can be found and included by ``mysqrt.cxx``.
:name: MathFunctions/CMakeLists.txt-target_include_directories-Table.h
:language: cmake
:start-after: # state that we depend on our bin
:end-before: # install rules
:end-before: # install libs
Now let's use the generated table. First, modify ``mysqrt.cxx`` to include
``Table.h``. Next, we can rewrite the ``mysqrt`` function to use the table:

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@@ -56,7 +56,7 @@ target_compile_definitions(MathFunctions PRIVATE "EXPORTING_MYMATH")
set_property(TARGET MathFunctions PROPERTY VERSION "1.0.0")
set_property(TARGET MathFunctions PROPERTY SOVERSION "1")
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
if(TARGET SqrtLibrary)
list(APPEND installable_libs SqrtLibrary)
@@ -64,4 +64,5 @@ endif()
install(TARGETS ${installable_libs}
EXPORT MathFunctionsTargets
DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -1,50 +1,80 @@
Step 5: Installing and Testing
==============================
Now we can start adding install rules and testing support to our project.
.. _`Tutorial Testing Support`:
Install Rules
Exercise 1 - Install Rules
^^^^^^^^^^^^^^^^^^^^^^^^^^
Often, it is not enough to only build an executable, it should also be
installable. With CMake, we can specify install rules using the
:command:`install` command. Supporting local installations for your builds in
CMake is often as simple as specifying an install location and the targets and
files to be installed.
Goal
----
Install the ``Tutorial`` executable and the ``MathFunctions`` library.
Helpful Materials
-----------------
* :command:`install`
Files to Edit
-------------
The install rules are fairly simple: for ``MathFunctions`` we want to install
the library and header file and for the application we want to install the
executable and configured header.
* ``MathFunctions/CMakeLists.txt``
* ``CMakeLists.txt``
So to the end of ``MathFunctions/CMakeLists.txt`` we add:
Getting Started
---------------
.. literalinclude:: Step6/MathFunctions/CMakeLists.txt
:caption: MathFunctions/CMakeLists.txt
:name: MathFunctions/CMakeLists.txt-install-TARGETS
:language: cmake
:start-after: # install rules
The starting code is provided in the ``Step5`` directory. In this
exercise, complete ``TODO 1`` through ``TODO 4``.
And to the end of the top-level ``CMakeLists.txt`` we add:
First, update ``MathFunctions/CMakeLists.txt`` to install the
``MathFunctions`` and ``tutorial_compiler_flags`` libraries to the ``lib``
directory. In that same file, specify the install rules needed to install
``MathFunctions.h`` to the ``include`` directory.
.. literalinclude:: Step6/CMakeLists.txt
:caption: CMakeLists.txt
:name: CMakeLists.txt-install-TARGETS
:language: cmake
:start-after: # add the install targets
:end-before: # enable testing
Then, update the top level ``CMakeLists.txt`` to install
the ``Tutorial`` executable to the ``bin`` directory. Lastly, any header files
should be installed to the ``include`` directory. Remember that
``TutorialConfig.h`` is in the :variable:`PROJECT_BINARY_DIR`.
That is all that is needed to create a basic local install of the tutorial.
Build and Run
-------------
Now run the :manual:`cmake <cmake(1)>` executable or the
Make a new directory called ``Step5_build``. Run the
:manual:`cmake <cmake(1)>` executable or the
:manual:`cmake-gui <cmake-gui(1)>` to configure the project and then build it
with your chosen build tool.
Then run the install step by using the ``install`` option of the
Then, run the install step by using the ``install`` option of the
:manual:`cmake <cmake(1)>` command (introduced in 3.15, older versions of
CMake must use ``make install``) from the command line. For
multi-configuration tools, don't forget to use the ``--config`` argument to
specify the configuration. If using an IDE, simply build the ``INSTALL``
target. This step will install the appropriate header files, libraries, and
executables. For example:
CMake must use ``make install``) from the command line. This step will
install the appropriate header files, libraries, and executables. For example:
.. code-block:: console
cmake --install .
For multi-configuration tools, don't forget to use the ``--config`` argument to
specify the configuration.
.. code-block:: console
cmake --install . --config Release
If using an IDE, simply build the ``INSTALL`` target. You can build the same
install target from the command line like the following:
.. code-block:: console
cmake --build . --target install --config Debug
The CMake variable :variable:`CMAKE_INSTALL_PREFIX` is used to determine the
root of where the files will be installed. If using the ``cmake --install``
command, the installation prefix can be overridden via the ``--prefix``
@@ -54,42 +84,227 @@ argument. For example:
cmake --install . --prefix "/home/myuser/installdir"
Navigate to the install directory and verify that the installed Tutorial runs.
Navigate to the install directory and verify that the installed ``Tutorial``
runs.
.. _`Tutorial Testing Support`:
Solution
--------
Testing Support
---------------
The install rules for our project are fairly simple:
Next let's test our application. At the end of the top-level ``CMakeLists.txt``
file we can enable testing and then add a number of basic tests to verify that
the application is working correctly.
* For ``MathFunctions``, we want to install the libraries and header file to
the ``lib`` and ``include`` directories respectively.
* For the ``Tutorial`` executable, we want to install the executable and
configured header file to the ``bin`` and ``include`` directories
respectively.
So to the end of ``MathFunctions/CMakeLists.txt`` we add:
.. raw:: html
<details><summary>TODO 1: Click to show/hide answer</summary>
.. literalinclude:: Step6/MathFunctions/CMakeLists.txt
:caption: TODO 1: MathFunctions/CMakeLists.txt
:name: MathFunctions/CMakeLists.txt-install-TARGETS
:language: cmake
:start-after: # install libs
:end-before: # install include headers
.. raw:: html
</details>
and
.. raw:: html
<details><summary>TODO 2: Click to show/hide answer</summary>
.. literalinclude:: Step6/MathFunctions/CMakeLists.txt
:caption: TODO 2: MathFunctions/CMakeLists.txt
:name: MathFunctions/CMakeLists.txt-install-headers
:language: cmake
:start-after: # install include headers
.. raw:: html
</details>
The install rules for the ``Tutorial`` executable and configured header file
are similar. To the end of the top-level ``CMakeLists.txt`` we add:
.. raw:: html
<details><summary>TODO 3,4: Click to show/hide answer</summary>
.. literalinclude:: Step6/CMakeLists.txt
:caption: CMakeLists.txt
:name: CMakeLists.txt-enable_testing
:name: TODO 3,4: CMakeLists.txt-install-TARGETS
:language: cmake
:start-after: # enable testing
:start-after: # add the install targets
:end-before: # enable testing
The first test simply verifies that the application runs, does not segfault or
otherwise crash, and has a zero return value. This is the basic form of a
CTest test.
.. raw:: html
The next test makes use of the :prop_test:`PASS_REGULAR_EXPRESSION` test
property to verify that the output of the test contains certain strings. In
this case, verifying that the usage message is printed when an incorrect number
of arguments are provided.
</details>
Lastly, we have a function called ``do_test`` that runs the application and
verifies that the computed square root is correct for given input. For each
invocation of ``do_test``, another test is added to the project with a name,
input, and expected results based on the passed arguments.
That is all that is needed to create a basic local
install of the tutorial.
Rebuild the application and then cd to the binary directory and run the
Exercise 2 - Testing Support
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
CTest offers a way to easily manage tests for your project. Tests can be
added through the :command:`add_test` command. Although it is not
explicitly covered in this tutorial, there is a lot of compatibility
between CTest and other testing frameworks such as :module:`GoogleTest`.
Goal
----
Create unit tests for our executable using CTest.
Helpful Materials
-----------------
* :command:`enable_testing`
* :command:`add_test`
* :command:`function`
* :command:`set_tests_properties`
* :manual:`ctest <ctest(1)>`
Files to Edit
-------------
* ``CMakeLists.txt``
Getting Started
---------------
The starting source code is provided in the ``Step5`` directory. In this
exercise, complete ``TODO 5`` through ``TODO 9``.
First, we need to enable testing. Next, begin adding tests to our project
using :command:`add_test`. We will work through adding 3 simple tests and
then you can add additional testing as you see fit.
Build and Run
-------------
Navigate to the build directory and rebuild the application. Then, run the
:manual:`ctest <ctest(1)>` executable: ``ctest -N`` and ``ctest -VV``. For
multi-config generators (e.g. Visual Studio), the configuration type must be
specified with the ``-C <mode>`` flag. For example, to run tests in Debug
mode use ``ctest -C Debug -VV`` from the binary directory
mode use ``ctest -C Debug -VV`` from the build directory
(not the Debug subdirectory!). Release mode would be executed from the same
location but with a ``-C Release``. Alternatively, build the ``RUN_TESTS``
location but with a ``-C Release``. Alternatively, build the ``RUN_TESTS``
target from the IDE.
Solution
--------
Let's test our application. At the end of the top-level ``CMakeLists.txt``
file we first need to enable testing with the
:command:`enable_testing` command.
.. raw:: html
<details><summary>TODO 5: Click to show/hide answer</summary>
.. literalinclude:: Step6/CMakeLists.txt
:caption: TODO 5: CMakeLists.txt
:name: CMakeLists.txt-enable_testing
:language: cmake
:start-after: # enable testing
:end-before: # does the application run
.. raw:: html
</details>
With testing enabled, we will add a number of basic tests to verify
that the application is working correctly. First, we create a test using
:command:`add_test` which runs the ``Tutorial`` executable with the
parameter 25 passed in. For this test, we are not going to check the
executable's computed answer. This test will verify that
application runs, does not segfault or otherwise crash, and has a zero
return value. This is the basic form of a CTest test.
.. raw:: html
<details><summary>TODO 6: Click to show/hide answer</summary>
.. literalinclude:: Step6/CMakeLists.txt
:caption: TODO 6: CMakeLists.txt
:name: CMakeLists.txt-test-runs
:language: cmake
:start-after: # does the application run
:end-before: # does the usage message work
.. raw:: html
</details>
Next, let's use the :prop_test:`PASS_REGULAR_EXPRESSION` test property to
verify that the output of the test contains certain strings. In this case,
verifying that the usage message is printed when an incorrect number of
arguments are provided.
.. raw:: html
<details><summary>TODO 7: Click to show/hide answer</summary>
.. literalinclude:: Step6/CMakeLists.txt
:caption: TODO 7: CMakeLists.txt
:name: CMakeLists.txt-test-usage
:language: cmake
:start-after: # does the usage message work?
:end-before: # define a function to simplify adding tests
.. raw:: html
</details>
The next test we will add verifies the computed value is truly the
square root.
.. raw:: html
<details><summary>TODO 8: Click to show/hide answer</summary>
.. code-block:: cmake
:caption: TODO 8: CMakeLists.txt
:name: CMakeLists.txt-test-standard
add_test(NAME StandardUse COMMAND Tutorial 4)
set_tests_properties(StandardUse
PROPERTIES PASS_REGULAR_EXPRESSION "4 is 2"
)
.. raw:: html
</details>
This one test is not enough to give us confidence that it will
work for all values passed in. We should add more tests to verify this.
To easily add more tests, we make a function called ``do_test`` that runs the
application and verifies that the computed square root is correct for
given input. For each invocation of ``do_test``, another test is added to
the project with a name, input, and expected results based on the passed
arguments.
.. raw:: html
<details><summary>TODO 9: Click to show/hide answer</summary>
.. literalinclude:: Step6/CMakeLists.txt
:caption: TODO 9: CMakeLists.txt
:name: CMakeLists.txt-generalized-tests
:language: cmake
:start-after: # define a function to simplify adding tests
.. raw:: html
</details>

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@@ -41,7 +41,7 @@ Let's also add version numbering to the ``MathFunctions`` library. In
:name: MathFunctions/CMakeLists.txt-VERSION-properties
:language: cmake
:start-after: # setup the version numbering
:end-before: # install rules
:end-before: # install libs
From the ``Step12`` directory, create ``debug`` and ``release``
subdirectories. The layout will look like:

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@@ -25,7 +25,8 @@ target_include_directories(MathFunctions
# link our compiler flags interface library
target_link_libraries(MathFunctions tutorial_compiler_flags)
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -50,10 +50,11 @@ target_link_libraries(MathFunctions PUBLIC tutorial_compiler_flags)
# building on windows
target_compile_definitions(MathFunctions PRIVATE "EXPORTING_MYMATH")
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
if(TARGET SqrtLibrary)
list(APPEND installable_libs SqrtLibrary)
endif()
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -52,7 +52,7 @@ target_link_libraries(MathFunctions PUBLIC tutorial_compiler_flags)
# building on windows
target_compile_definitions(MathFunctions PRIVATE "EXPORTING_MYMATH")
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
if(TARGET SqrtLibrary)
list(APPEND installable_libs SqrtLibrary)
@@ -60,4 +60,5 @@ endif()
install(TARGETS ${installable_libs}
EXPORT MathFunctionsTargets
DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -38,3 +38,27 @@ target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS} tutorial_compiler_flags)
target_include_directories(Tutorial PUBLIC
"${PROJECT_BINARY_DIR}"
)
# TODO 3: Install Tutorial in the bin directory
# Hint: Use the TARGETS and DESTINATION parameters
# TODO 4: Install Tutorial.h to the include directory
# Hint: Use the FILES and DESTINATION parameters
# TODO 5: Enable testing
# TODO 6: Add a test called Runs which runs the following command:
# $ Tutorial 25
# TODO 7: Add a test called Usage which runs the following command:
# $ Tutorial
# Make sure the expected output is displayed.
# Hint: Use the PASS_REGULAR_EXPRESSION property with "Usage.*number"
# TODO 8: Add a test which runs the following command:
# $ Tutorial 4
# Make sure the result is correct.
# Hint: Use the PASS_REGULAR_EXPRESSION property with "4 is 2"
# TODO 9: Add more tests. Create a function called do_test to avoid copy +
# paste. Test the following values: 4, 9, 5, 7, 25, -25 and 0.00001.

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@@ -8,3 +8,11 @@ target_include_directories(MathFunctions
# link our compiler flags interface library
target_link_libraries(MathFunctions tutorial_compiler_flags)
# TODO 1: Create a variable called installable_libs that is a list of all
# libraries we want to install (e.g. MathFunctions and tutorial_compiler_flags)
# Then install the installable libraries to the lib folder.
# Hint: Use the TARGETS and DESTINATION parameters
# TODO 2: Install the library headers to the include folder.
# Hint: Use the FILES and DESTINATION parameters

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@@ -9,7 +9,8 @@ target_include_directories(MathFunctions
# link our compiler flags interface library
target_link_libraries(MathFunctions tutorial_compiler_flags)
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -9,7 +9,8 @@ target_include_directories(MathFunctions
# link our compiler flags interface library
target_link_libraries(MathFunctions tutorial_compiler_flags)
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -32,7 +32,8 @@ if(HAVE_LOG AND HAVE_EXP)
PRIVATE "HAVE_LOG" "HAVE_EXP")
endif()
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)

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@@ -27,7 +27,8 @@ target_include_directories(MathFunctions
# link our compiler flags interface library
target_link_libraries(MathFunctions tutorial_compiler_flags)
# install rules
# install libs
set(installable_libs MathFunctions tutorial_compiler_flags)
install(TARGETS ${installable_libs} DESTINATION lib)
# install include headers
install(FILES MathFunctions.h DESTINATION include)