mirror of
https://github.com/unslothai/unsloth.git
synced 2026-07-09 15:58:41 +00:00
46 lines
1.9 KiB
Python
46 lines
1.9 KiB
Python
"""Regression test for the duplicate ``unsloth/gemma-2b-bnb-4bit`` key in
|
|
``unsloth/models/mapper.py``.
|
|
|
|
The 4bit instruction-tuned Gemma 2B entry was accidentally keyed with the base
|
|
model's repo name, so ``__INT_TO_FLOAT_MAPPER`` held two identical
|
|
``unsloth/gemma-2b-bnb-4bit`` keys. Python keeps only the last value for a
|
|
duplicate literal key, so the base 4bit repo resolved to the *instruct* model,
|
|
the base model lost its reverse (4x-faster) mapping, and
|
|
``unsloth/gemma-2b-it-bnb-4bit`` was never registered at all.
|
|
|
|
``mapper.py`` has no imports, so we exec it directly and inspect the built
|
|
mappers without importing ``unsloth`` (which requires a GPU).
|
|
"""
|
|
|
|
import os
|
|
|
|
MAPPER_PATH = os.path.join(os.path.dirname(__file__), os.pardir, "unsloth", "models", "mapper.py")
|
|
|
|
|
|
def _load_mappers():
|
|
with open(MAPPER_PATH) as f:
|
|
source = f.read()
|
|
namespace = {}
|
|
exec(compile(source, MAPPER_PATH, "exec"), namespace)
|
|
return namespace
|
|
|
|
|
|
def test_gemma_2b_base_and_instruct_4bit_are_distinct():
|
|
namespace = _load_mappers()
|
|
int_to_float = namespace["INT_TO_FLOAT_MAPPER"]
|
|
float_to_int = namespace["FLOAT_TO_INT_MAPPER"]
|
|
|
|
# The base 4bit repo must resolve to the base model, not the instruct one.
|
|
assert int_to_float["unsloth/gemma-2b-bnb-4bit"] == "unsloth/gemma-2b"
|
|
|
|
# The instruct 4bit repo must be registered and resolve to the instruct model.
|
|
assert "unsloth/gemma-2b-it-bnb-4bit" in int_to_float
|
|
assert int_to_float["unsloth/gemma-2b-it-bnb-4bit"] == "unsloth/gemma-2b-it"
|
|
|
|
# The base model must reverse-map back to the base 4bit repo.
|
|
assert float_to_int["unsloth/gemma-2b"] == "unsloth/gemma-2b-bnb-4bit"
|
|
assert float_to_int["google/gemma-2b"] == "unsloth/gemma-2b-bnb-4bit"
|
|
|
|
# The instruct model must reverse-map to the instruct 4bit repo.
|
|
assert float_to_int["unsloth/gemma-2b-it"] == "unsloth/gemma-2b-it-bnb-4bit"
|
|
assert float_to_int["google/gemma-2b-it"] == "unsloth/gemma-2b-it-bnb-4bit"
|