Functions
	test_example3_stage1_bfs_finest_first_leaf_distribution ()
	Integration test for the example shown in visualise_tree_split_example3.png.

	test_example3_stage3_promotes_root_and_level1_node ()
	Integration test for the full staged pipeline on example 3.

	test_example3_stage3_can_promote_sparse_mixed_parents_when_enabled ()
	With relaxed Stage III gating, sparse mixed parents in example 3 can be promoted without requiring a complete child set.

Function Documentation

◆ test_example3_stage1_bfs_finest_first_leaf_distribution()

test_splittrees_example3_offline_triple_split.test_example3_stage1_bfs_finest_first_leaf_distribution ( )

Integration test for the example shown in visualise_tree_split_example3.png.

The final tree contains 10 leaves arranged as a single refined branch:

With 3 subtrees and bfs_finest_first traversal, Stage I should distribute the leaves as [4, 3, 3].

test_splittrees_example3_offline_triple_split.test_example3_stage3_can_promote_sparse_mixed_parents_when_enabled ( )

With relaxed Stage III gating, sparse mixed parents in example 3 can be promoted without requiring a complete child set.

test_splittrees_example3_offline_triple_split.test_example3_stage3_promotes_root_and_level1_node ( )

Integration test for the full staged pipeline on example 3.

Stage II should compact the deepest branch onto Level 2.

For this sparse example, Stage III keeps the upper mixed parents unchanged (their child set is incomplete), while preserving the same leaf split.