New file: test/domains/continuum/test_helpers.jl
Helper functions:
- create_test_mesh_tet4(n) - generates n-element Tet4 mesh
- create_test_kernel() - creates LinearElastic kernel
- create_test_cache() - creates COOCache
- setup_assembly_test(n) - complete setup in one call
Purpose:
- Reduce code duplication across test files
- Provide consistent test data
- Make tests more readable
- Easy to extend for other element types
Used by test_full_assembly.jl, test_compute_block.jl, etc.
Jukka Aho