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"""v4 → v5 migrator: additive `training.precision` override (identity).""" |
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from __future__ import annotations |
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from typing import Any |
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from dlm.doc.migrations.v4 import migrate |
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from dlm.doc.schema import DlmFrontmatter |
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VALID_ULID = "01HZ4X7TGZM3J1A2B3C4D5E6F7" |
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class TestIdentity: |
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def test_empty_passthrough(self) -> None: |
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raw: dict[str, Any] = {} |
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out = migrate(raw) |
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assert out == raw |
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assert out is not raw |
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def test_v4_training_block_preserved(self) -> None: |
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raw: dict[str, Any] = { |
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"training": { |
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"lora_r": 16, |
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"adapters": { |
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"knowledge": {"adapter": "lora", "lora_r": 8}, |
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}, |
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}, |
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} |
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out = migrate(raw) |
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assert out == raw |
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class TestValidatesAsV5: |
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def test_migrated_doc_validates_without_precision(self) -> None: |
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# A v4 doc with no precision override parses as v5 unchanged; |
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# precision defaults to None (let the planner pick). |
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raw: dict[str, Any] = { |
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"dlm_id": VALID_ULID, |
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"base_model": "smollm2-135m", |
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"dlm_version": 4, |
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} |
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out = migrate(raw) |
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out["dlm_version"] = 5 |
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fm = DlmFrontmatter.model_validate(out) |
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assert fm.training.precision is None |
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def test_migrated_doc_accepts_precision_override(self) -> None: |
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raw: dict[str, Any] = { |
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"dlm_id": VALID_ULID, |
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"base_model": "smollm2-135m", |
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"dlm_version": 4, |
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"training": {"precision": "fp16"}, |
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} |
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out = migrate(raw) |
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out["dlm_version"] = 5 |
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fm = DlmFrontmatter.model_validate(out) |
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assert fm.training.precision == "fp16" |