93     FTNODE root_node;  in test_split_merge()  local
98                    &bfe, PL_WRITE_EXPENSIVE, &root_node, true);  in test_split_merge()
100     invariant(root_node->blocknum.b == ft->h->root_blocknum.b);  in test_split_merge()
102     invariant(root_node->n_children > 1);  in test_split_merge()
103     invariant(root_node->height == 1);  in test_split_merge()
107     invariant(BP_BLOCKNUM(root_node, root_node->n_children - 1).b == ft->rightmost_blocknum.b);  in test_split_merge()
110     const int num_children_before_merge = root_node->n_children;  in test_split_merge()
116     toku_unpin_ftnode(ft, root_node);  in test_split_merge()
124                     &bfe, PL_WRITE_EXPENSIVE, &root_node, true);  in test_split_merge()
135     toku_ft_merge_child(ft, root_node, root_node->n_children - 1);  in test_split_merge()
138                    &bfe, PL_WRITE_EXPENSIVE, &root_node, true);  in test_split_merge()
141     invariant(root_node->n_children < num_children_before_merge);  in test_split_merge()
142     invariant(root_node->height == 1);  in test_split_merge()
144     invariant(BP_BLOCKNUM(root_node, root_node->n_children - 1).b == ft->rightmost_blocknum.b);  in test_split_merge()
149     toku_unpin_ftnode(ft, root_node);  in test_split_merge()