
Runs tests based on blend files with minimum python interaction. Developed as part of GSoC 2021 - Regression Testing of Geometry Nodes. Earlier, tests were built from scratch by adding a modifier/operation from the Python API. Now, tests can also be created inside blender and are compared using Python script. Features: Automatically adding expected object if it doesn't exist. This patch adds tests for the following Geometry Nodes category: * Curves * Geometry * Mesh * Points The implemented UML diagram for refactoring of mesh test framework. {F10225906} Technical Changes: SpecMeshTest: It adds the modifier/operation based on the Spec provided. BlendFileTest: It applies already existing modifier/operation from the blend file. Test folders hierarchy with tests. This folder should be extracted to `lib\tests\modeling` {F10240651} Note: The `geometry_nodes` folder might lie under another `geometry_nodes` folder while extracting, please double check. Use the inner-most one. The hierarchy should be: -`lib\tests\modeling\geometry_nodes\mesh` -`lib\tests\modeling\geometry_nodes\points` and so on. * From `ctest` the tests should be run as `ctest -R geo_node -C [Configuration]` on Windows. * Each single test can be run with its entire name e..g `ctest -R geo_node_geometry_join_geometry`.(just an example). Run `ctest -N -R geo_node` to see all tests. * From blender, the tests can be run `blender -b path\to\blend\file --python path\to\geo_node_test.py` Reviewed By: zazizizou, JacquesLucke Differential Revision: https://developer.blender.org/D11611