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2b09ecea76
## Description Extracts image-compression gating and tag stamping into a pure policy module while preserving the public `ImageCompressionDecision.decide` API used by handlers. This keeps the frozen decision value type separate from the canonical precedence rules it wraps. Closes # ## Type of Change - [ ] Bug fix (non-breaking change that fixes an issue) - [ ] New feature (non-breaking change that adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to change) - [ ] Documentation update - [ ] Performance improvement - [x] Code refactoring (no functional changes) ## Changes Made - Added `headroom.proxy.image_compression_policy` for pure image-compression precedence and tag stamping helpers. - Updated `ImageCompressionDecision.decide` and `ImageCompressionDecision.apply_to_tags` to delegate to the extracted policy. - Added direct tests for the extracted policy boundary. - Kept the LiteLLM callback compatibility shim required for repo-wide type checking on fresh branches. ## Testing - [x] Unit tests pass (`pytest`) - [x] Linting passes (`ruff check .`) - [x] Type checking passes (`mypy headroom`) - [x] New tests added for new functionality - [ ] Manual testing performed ### Test Output ```text python -m pytest tests/test_image_compression_policy.py tests/test_image_compression_decision.py tests/test_handler_outcome_tag_invariant.py tests/test_litellm_callback.py tests/test_compress_api.py::TestLiteLLMCallback -q 34 passed in 6.77s python -m ruff check . All checks passed! python -m ruff format --check . 1095 files already formatted python -m mypy headroom --ignore-missing-imports Success: no issues found in 409 source files gitleaks protect --staged --no-banner --redact no leaks found ``` ## Real Behavior Proof - Environment: Windows, Python 3.13.13, local worktree based on `headroomlabs/main`. - Exact command / steps: ran focused image compression policy/decision tests, handler outcome tag invariant tests, LiteLLM callback tests, Ruff lint/format checks, mypy over `headroom`, and staged gitleaks scan. - Observed result: all local checks passed; staged secret scan found no leaks. - Not tested: full CI matrix and deployment flows; those are covered by GitHub Actions. ## Review Readiness - [x] I have performed a self-review - [x] This PR is ready for human review ## Checklist - [x] My code follows the project's style guidelines - [x] I have performed a self-review of my code - [x] I have commented my code, particularly in hard-to-understand areas - [ ] I have made corresponding changes to the documentation - [x] My changes generate no new warnings - [x] I have added tests that prove my fix is effective or that my feature works - [x] New and existing unit tests pass locally with my changes - [ ] I have updated the CHANGELOG.md if applicable ## Screenshots (if applicable) N/A ## Additional Notes Documentation and changelog updates are not applicable for this internal refactor. GitHub reported existing Dependabot alerts on the default branch during push; this PR does not change dependencies, and the staged secret scan is clean.
58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
"""Tests for pure image-compression decision policy helpers."""
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from __future__ import annotations
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from headroom.proxy.image_compression_policy import (
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apply_image_skip_reason,
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decide_image_compression,
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)
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def test_decide_image_compression_allows_happy_path() -> None:
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decision = decide_image_compression(
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headers={},
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image_optimize_enabled=True,
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has_messages=True,
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)
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assert decision.should_compress is True
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assert decision.passthrough_reason is None
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def test_decide_image_compression_uses_canonical_precedence() -> None:
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decision = decide_image_compression(
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headers={"x-headroom-bypass": "true"},
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image_optimize_enabled=False,
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has_messages=False,
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)
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assert decision.should_compress is False
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assert decision.passthrough_reason == "bypass_header"
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assert decision.bypass_header_set is True
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assert decision.image_optimize_enabled is False
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assert decision.has_messages is False
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def test_decide_image_compression_reports_config_and_message_reasons() -> None:
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disabled = decide_image_compression(
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headers={},
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image_optimize_enabled=False,
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has_messages=True,
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)
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empty = decide_image_compression(
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headers={},
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image_optimize_enabled=True,
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has_messages=False,
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)
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assert disabled.passthrough_reason == "image_optimize_disabled"
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assert empty.passthrough_reason == "no_messages"
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def test_apply_image_skip_reason_stamps_only_when_skipping() -> None:
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tags: dict[str, str] = {}
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apply_image_skip_reason(tags, None)
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assert tags == {}
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apply_image_skip_reason(tags, "no_messages")
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assert tags == {"image_skip_reason": "no_messages"}
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