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251 lines
9.8 KiB
Python
251 lines
9.8 KiB
Python
"""Tests for ``hermes migrate xai`` — apply path with ruamel round-trip."""
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from __future__ import annotations
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from pathlib import Path
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import pytest
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from hermes_cli.xai_retirement import (
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RetirementIssue,
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apply_migration,
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find_retired_xai_refs,
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)
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# ---------------------------------------------------------------------------
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# Fixtures
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# ---------------------------------------------------------------------------
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@pytest.fixture
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def trap_config(tmp_path: Path) -> Path:
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"""A config.yaml with retired models AND comments to verify round-trip."""
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p = tmp_path / "config.yaml"
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p.write_text(
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"# Hermes config (sample)\n"
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"principal:\n"
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" provider: xai # the main model\n"
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" model: grok-4-1-fast-non-reasoning # retiring May 15\n"
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" temperature: 0.5\n"
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"auxiliary:\n"
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" vision:\n"
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" provider: xai\n"
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" model: grok-4-fast-reasoning # retiring\n"
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" compression:\n"
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" provider: openai # not affected\n"
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" model: gpt-4o-mini\n"
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"delegation:\n"
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" model: grok-code-fast-1 # retiring\n"
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"plugins:\n"
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" image_gen:\n"
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" xai:\n"
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" model: grok-imagine-image-pro # retiring\n",
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encoding="utf-8",
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)
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return p
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@pytest.fixture
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def clean_config(tmp_path: Path) -> Path:
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p = tmp_path / "config.yaml"
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p.write_text(
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"principal:\n"
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" provider: xai\n"
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" model: grok-4.3\n",
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encoding="utf-8",
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)
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return p
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def _parse(path: Path) -> dict:
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"""Load with ruamel for assertion convenience."""
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from ruamel.yaml import YAML
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yaml = YAML(typ="rt")
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with path.open("r", encoding="utf-8") as fh:
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return yaml.load(fh)
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# ---------------------------------------------------------------------------
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# Dry-run / no-op
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# ---------------------------------------------------------------------------
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class TestNoOpPaths:
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def test_clean_config_returns_unchanged_result(self, clean_config: Path):
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issues = find_retired_xai_refs(_parse(clean_config))
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assert issues == []
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result = apply_migration(clean_config, issues)
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assert result.config_changed is False
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assert result.backup_path is None
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# File untouched
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assert "grok-4.3" in clean_config.read_text(encoding="utf-8")
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def test_empty_issues_list_is_noop(self, trap_config: Path):
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original = trap_config.read_text(encoding="utf-8")
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result = apply_migration(trap_config, issues=[])
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assert result.config_changed is False
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assert trap_config.read_text(encoding="utf-8") == original
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def test_missing_file_raises(self, tmp_path: Path):
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with pytest.raises(FileNotFoundError):
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apply_migration(tmp_path / "absent.yaml", issues=[
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RetirementIssue(
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config_path="principal.model",
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current_model="grok-3",
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replacement="grok-4.3",
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)
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])
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# ---------------------------------------------------------------------------
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# Apply: surgical replacement
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# ---------------------------------------------------------------------------
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class TestApplyReplacement:
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def test_replaces_principal_model(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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result = apply_migration(trap_config, issues)
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assert result.config_changed is True
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cfg = _parse(trap_config)
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assert cfg["principal"]["model"] == "grok-4.3"
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def test_adds_reasoning_effort_for_non_reasoning_variant(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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cfg = _parse(trap_config)
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# Principal was grok-4-1-fast-non-reasoning → reasoning_effort: "none"
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assert cfg["principal"]["reasoning_effort"] == "none"
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def test_replaces_auxiliary_vision(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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cfg = _parse(trap_config)
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assert cfg["auxiliary"]["vision"]["model"] == "grok-4.3"
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def test_replaces_delegation(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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cfg = _parse(trap_config)
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assert cfg["delegation"]["model"] == "grok-4.3"
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def test_replaces_image_gen_plugin(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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cfg = _parse(trap_config)
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assert cfg["plugins"]["image_gen"]["xai"]["model"] == "grok-imagine-image-quality"
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def test_does_not_touch_unrelated_slots(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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cfg = _parse(trap_config)
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# auxiliary.compression was never xAI, must remain untouched
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assert cfg["auxiliary"]["compression"]["model"] == "gpt-4o-mini"
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assert cfg["auxiliary"]["compression"]["provider"] == "openai"
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# principal.temperature must survive
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assert cfg["principal"]["temperature"] == 0.5
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# ---------------------------------------------------------------------------
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# Round-trip preservation (the hard part)
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# ---------------------------------------------------------------------------
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class TestRoundTripPreservation:
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def test_preserves_top_of_file_comment(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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text = trap_config.read_text(encoding="utf-8")
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assert "# Hermes config (sample)" in text
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def test_preserves_inline_comments_on_unmodified_lines(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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text = trap_config.read_text(encoding="utf-8")
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assert "# the main model" in text
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assert "# not affected" in text
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def test_preserves_top_level_key_order(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues)
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text = trap_config.read_text(encoding="utf-8")
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order = [
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text.index("principal:"),
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text.index("auxiliary:"),
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text.index("delegation:"),
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text.index("plugins:"),
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]
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assert order == sorted(order)
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# ---------------------------------------------------------------------------
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# Backup behaviour
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# ---------------------------------------------------------------------------
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class TestBackup:
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def test_backup_is_written_by_default(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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original = trap_config.read_text(encoding="utf-8")
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result = apply_migration(trap_config, issues)
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assert result.backup_path is not None
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assert result.backup_path.exists()
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assert result.backup_path.read_text(encoding="utf-8") == original
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def test_backup_filename_prefixed(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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result = apply_migration(trap_config, issues)
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assert result.backup_path is not None
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assert result.backup_path.name.startswith("config.yaml.bak-pre-migrate-xai-")
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def test_no_backup_when_disabled(self, trap_config: Path):
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issues = find_retired_xai_refs(_parse(trap_config))
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result = apply_migration(trap_config, issues, backup=False)
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assert result.backup_path is None
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# No bak file in the directory
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assert not list(trap_config.parent.glob("*.bak-pre-migrate-xai-*"))
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def test_no_backup_when_no_changes(self, clean_config: Path):
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issues = find_retired_xai_refs(_parse(clean_config))
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result = apply_migration(clean_config, issues, backup=True)
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assert result.backup_path is None # nothing to back up
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assert not list(clean_config.parent.glob("*.bak-pre-migrate-xai-*"))
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# ---------------------------------------------------------------------------
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# Idempotence
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# ---------------------------------------------------------------------------
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class TestIdempotence:
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def test_apply_twice_is_safe(self, trap_config: Path):
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# First pass: replace
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issues_1 = find_retired_xai_refs(_parse(trap_config))
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apply_migration(trap_config, issues_1)
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# Second pass: nothing to do
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issues_2 = find_retired_xai_refs(_parse(trap_config))
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assert issues_2 == []
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result_2 = apply_migration(trap_config, issues_2)
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assert result_2.config_changed is False
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# ---------------------------------------------------------------------------
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# Fail-closed on unreadable existing config
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# ---------------------------------------------------------------------------
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class TestUnreadableExistingConfig:
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def test_apply_refuses_to_overwrite_unreadable_config(self, trap_config: Path):
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"""apply_migration must not clobber an existing config.yaml it can't
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read. It reads the file first (which raises on an unreadable file), and
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the require_readable_config_before_write guard before the write is a
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belt-and-suspenders backstop for the read-then-write window. Either way
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the original bytes must survive."""
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import os
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issues = find_retired_xai_refs(_parse(trap_config))
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assert issues # sanity: trap_config has retired refs
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original = trap_config.read_bytes()
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os.chmod(trap_config, 0o000)
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try:
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with pytest.raises((PermissionError, RuntimeError, OSError)):
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apply_migration(trap_config, issues, backup=False)
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finally:
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os.chmod(trap_config, 0o644)
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assert trap_config.read_bytes() == original
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