test_hash_grouped¶

Hash-mode grouped field-sum aggregation golden: one accumulator per DISTINCT key regardless of input order (the ordered tile’s sorted_by_key staging precondition removed), key-ascending drain, explicit overflow, and the host split-and-merge algebra that makes overflow recoverable.

Attributes¶

_MASK

Functions¶

`_rows`(seed, count, keys) → list[tuple[int, int, int, int]]
`_as_pairs`(groups)
`test_one_record_per_distinct_key_regardless_of_order`() → None
`test_permutation_invariance`() → None
`test_sorted_input_agrees_with_the_ordered_tile`() → None
`test_drain_is_signed_key_ascending`() → None
`test_keys_are_int32_wires`() → None
`test_overflow_invalidates_the_batch`() → None	The platform's uniform error convention: an error close-out
`test_full_table_without_a_new_key_is_not_an_overflow`() → None
`test_bad_configuration_is_refused`() → None
`test_split_and_merge_equals_one_shot`() → None	The property that makes overflow recoverable rather than fatal.
`test_key_range_split_recovers_an_overflowed_batch`() → None
`test_merging_mixed_field_masks_is_a_caller_error`() → None
`test_empty_batch_emits_nothing`() → None
`test_record_words_match_the_ordered_tile_shape`() → None

Module Contents¶

test_hash_grouped._MASK = 2¶

test_hash_grouped._rows(seed: int, count: int, keys: int) → list[tuple[int, int, int, int]]¶

test_hash_grouped._as_pairs(groups)¶

test_hash_grouped.test_one_record_per_distinct_key_regardless_of_order() → None¶

test_hash_grouped.test_permutation_invariance() → None¶

test_hash_grouped.test_sorted_input_agrees_with_the_ordered_tile() → None¶

test_hash_grouped.test_drain_is_signed_key_ascending() → None¶

test_hash_grouped.test_keys_are_int32_wires() → None¶

test_hash_grouped.test_overflow_invalidates_the_batch() → None¶: The platform’s uniform error convention: an error close-out invalidates the whole batch. Returning the partial accumulation would be a DOUBLE-COUNT hazard, since the host’s recovery re-runs the same rows split by key range.

test_hash_grouped.test_full_table_without_a_new_key_is_not_an_overflow() → None¶

test_hash_grouped.test_bad_configuration_is_refused() → None¶

test_hash_grouped.test_split_and_merge_equals_one_shot() → None¶: The property that makes overflow recoverable rather than fatal.

test_hash_grouped.test_key_range_split_recovers_an_overflowed_batch() → None¶

test_hash_grouped.test_merging_mixed_field_masks_is_a_caller_error() → None¶

test_hash_grouped.test_empty_batch_emits_nothing() → None¶

test_hash_grouped.test_record_words_match_the_ordered_tile_shape() → None¶