These two tests cover the extended boundary option for the blur node. One with single value input and another with variable input. They mirror the non-extended gaussian tests. Coverage: - Function: 86.36% -> 90.91% - Line: 91.95% -> 96.90% - Region: 83.51% -> 96.63% - Branch: 84.00% -> 95.65% Pull Request: https://projects.blender.org/blender/blender/pulls/141528