Make sure CI install pytest (via pip3) and wrap pytest invocation with CMake option

Author: hyi18

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
         shell: bash
         run: |
             sudo yum install --setopt=tsflags=nodocs -y eigen3-devel ceres-solver-devel json-devel
-            sudo python -m pip install nanobind
+            sudo python -m pip3 install nanobind pytest
 
       - name: Configure CMake
         # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
@@ -153,7 +153,7 @@ jobs:
         shell: bash
         run: |
             sudo yum install --setopt=tsflags=nodocs -y eigen3-devel ceres-solver-devel json-devel
-            sudo python -m pip install nanobind
+            sudo python -m pip3 install nanobind pytest
 
       - name: Configure CMake
         # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.

tests/CMakeLists.txt

@@ -202,18 +202,20 @@ add_test ( NAME Test_ImageConverter COMMAND Test_ImageConverter )
 
 ################################################################################
 # Python tests
-find_program(PYTHON_EXECUTABLE python3)
-if(PYTHON_EXECUTABLE)
-    add_test(
-        NAME Test_Python_ImageConverter
-        COMMAND ${PYTHON_EXECUTABLE} -m pytest ${CMAKE_CURRENT_SOURCE_DIR}/python/test_image_converter.py -v
-        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
-    )
-
-    # Set environment for Python test to find the compiled module
-    set_tests_properties(Test_Python_ImageConverter PROPERTIES
-        ENVIRONMENT "PYTHONPATH=${CMAKE_BINARY_DIR}/src/bindings:$ENV{PYTHONPATH}"
-    )
+if(RTA_BUILD_PYTHON_BINDINGS)
+    find_program(PYTHON_EXECUTABLE python3)
+    if(PYTHON_EXECUTABLE)
+        add_test(
+            NAME Test_Python_ImageConverter
+            COMMAND ${PYTHON_EXECUTABLE} -m pytest ${CMAKE_CURRENT_SOURCE_DIR}/python/test_image_converter.py -v
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+
+        # Set environment for Python test to find the compiled module
+        set_tests_properties(Test_Python_ImageConverter PROPERTIES
+            ENVIRONMENT "PYTHONPATH=${CMAKE_BINARY_DIR}/src/bindings:$ENV{PYTHONPATH}"
+        )
+    endif()
 endif()
 
 ################################################################################