cmake: Fix running test in build directory on Windows

Author: jorisv

example/CMakeLists.txt

@@ -1,4 +1,15 @@
+function(ADD_WINDOWS_DLL_PATH_TO_TEST TEST_NAME)
+  if(WIN32)
+    get_test_property(${TEST_NAME} ENVIRONMENT ENV_VARIABLES)
+    list(APPEND ENV_VARIABLES
+         "PYCPPAD_WINDOWS_DLL_PATH=$<TARGET_FILE_DIR:${PROJECT_NAME}>")
+    set_tests_properties(${TEST_NAME} PROPERTIES ENVIRONMENT "${ENV_VARIABLES}")
+  endif()
+endfunction()
+
 ADD_PYTHON_UNIT_TEST("${PROJECT_NAME}-add_eq" "example/add_eq.py" "python")
+ADD_WINDOWS_DLL_PATH_TO_TEST(${PROJECT_NAME}-add_eq)
 IF(BUILD_WITH_CPPAD_CODEGEN_BINDINGS)
   ADD_PYTHON_UNIT_TEST("${PROJECT_NAME}-cppadcg_c_codegen" "example/cppadcg_c_codegen.py" "python")
+  ADD_WINDOWS_DLL_PATH_TO_TEST(${PROJECT_NAME}-cppadcg_c_codegen)
 ENDIF()

python/pycppad/__init__.py

@@ -2,9 +2,6 @@
 # Copyright 2021 INRIA
 #
 
-from .pycppad_pywrap import *
-from .pycppad_pywrap import __version__, __raw_version__
-
 # On Windows, if pycppad.dll is not in the same directory than
 # the .pyd, it will not be loaded.
 # We first try to load pycppad, then, if it fail and we are on Windows: