message: Add CMake option ENABLE_TESTING
diff: @@ -6,6 +6,8 @@ set(CMAKE_CXX_STANDARD 17)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
  +option(ENABLE_TESTING "Enable testing" ON)
  +
  # We use:
  # - InstallBasicPackageFiles
  # (http://robotology.github.io/ycm/gh-pages/v0.8/
  @@ -219,6 +221,8 @@ endif(MSVC)
  # Add the uninstall target
  include(AddUninstallTarget)
  +if (ENABLE_TESTING)
  +
  # Build the test binary
  add_executable(dataframe_tester test/dataframe_tester.cc)
  add_executable(dataframe_tester_2 test/dataframe_tester_2.cc)
  @@ -339,3 +343,5 @@ file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/test/sample_data_string_index.csv
  file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/test/sample_data_string_index.csv
  DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/bin/Release)
  message("-- Copying files for testing - done")
  +
  +endif(ENABLE_TESTING)
  