test_cache_status.py
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| 1 | """TDD tests for muse#49 Phase 4 — ``get_cache_status`` / ``--cache-status``. |
| 2 | |
| 3 | Covers CT_11–CT_14: an honest, content-addressed-aware status schema (not |
| 4 | the ticket's originally-imagined snapshot-ID-keyed one — see |
| 5 | ``docs/code-test-internals.md`` "Decision" section for why), graceful |
| 6 | behavior on a fresh repo with no commits and no cache files, and the |
| 7 | stale/cache_hit flags tracking real per-file cache warmth. |
| 8 | """ |
| 9 | |
| 10 | from __future__ import annotations |
| 11 | |
| 12 | import pathlib |
| 13 | |
| 14 | import pytest |
| 15 | |
| 16 | from muse.core.callgraph_cache import CallGraphCache |
| 17 | from muse.core.commits import get_head_snapshot_id |
| 18 | from muse.core.snapshots import read_snapshot |
| 19 | from muse.core.symbol_cache import SymbolCache |
| 20 | from muse.core.test_selection import ChangedSymbol, get_cache_status, select_tests |
| 21 | from tests.cli_test_helper import CliRunner |
| 22 | |
| 23 | |
| 24 | @pytest.fixture |
| 25 | def repo(tmp_path: pathlib.Path, monkeypatch: pytest.MonkeyPatch) -> pathlib.Path: |
| 26 | monkeypatch.chdir(tmp_path) |
| 27 | monkeypatch.setenv("MUSE_REPO_ROOT", str(tmp_path)) |
| 28 | runner = CliRunner() |
| 29 | result = runner.invoke(None, ["init", "--domain", "code"]) |
| 30 | assert result.exit_code == 0, result.output |
| 31 | return tmp_path |
| 32 | |
| 33 | |
| 34 | class TestFreshRepoGraceful: |
| 35 | def test_no_commits_no_exception_zero_counts(self, repo: pathlib.Path) -> None: |
| 36 | """CT_14: a freshly-initialised repo with no commits and no cache |
| 37 | files must never raise — just report trivially empty status.""" |
| 38 | status = get_cache_status(repo) |
| 39 | |
| 40 | assert status["head_snapshot_id"] is None |
| 41 | assert status["semantic_files_total"] == 0 |
| 42 | assert status["files_warm"] == 0 |
| 43 | assert status["files_cold"] == 0 |
| 44 | assert status["cache_hit"] is True |
| 45 | assert status["stale"] is False |
| 46 | assert status["symbol_cache_entries"] == 0 |
| 47 | assert status["callgraph_cache_entries"] == 0 |
| 48 | assert status["symbol_cache_age_seconds"] is None |
| 49 | assert status["callgraph_cache_age_seconds"] is None |
| 50 | |
| 51 | def test_no_muse_repo_at_all_no_exception(self, tmp_path: pathlib.Path) -> None: |
| 52 | """Not even a ``.muse/`` directory — must still degrade gracefully.""" |
| 53 | status = get_cache_status(tmp_path) |
| 54 | assert status["cache_hit"] is True |
| 55 | assert status["head_snapshot_id"] is None |
| 56 | |
| 57 | |
| 58 | class TestColdAfterCommitBeforeAnyRun: |
| 59 | def test_committed_file_reported_cold(self, repo: pathlib.Path) -> None: |
| 60 | """CT_11/CT_12: after a real commit, before any cache-populating |
| 61 | ``select_tests`` call, the file must be reported stale/cold.""" |
| 62 | (repo / "prod.py").write_text("def compute(x: int) -> int:\n return x * 2\n") |
| 63 | runner = CliRunner() |
| 64 | assert runner.invoke(None, ["code", "add", "."]).exit_code == 0 |
| 65 | assert runner.invoke(None, ["commit", "-m", "v1"]).exit_code == 0 |
| 66 | |
| 67 | status = get_cache_status(repo) |
| 68 | |
| 69 | assert status["head_snapshot_id"] is not None |
| 70 | assert status["semantic_files_total"] == 1 |
| 71 | assert status["files_warm"] == 0 |
| 72 | assert status["files_cold"] == 1 |
| 73 | assert status["cache_hit"] is False |
| 74 | assert status["stale"] is True |
| 75 | |
| 76 | |
| 77 | class TestWarmAfterRealRun: |
| 78 | def test_cache_status_reflects_warm_run(self, repo: pathlib.Path) -> None: |
| 79 | """CT_13: after a real select_tests run warms both caches, status |
| 80 | must flip to cache_hit=True/stale=False and report nonzero entries |
| 81 | and a defined (non-negative) age — proving the status function reads |
| 82 | the *actual* on-disk cache state, not a hardcoded value.""" |
| 83 | (repo / "prod.py").write_text("def compute(x: int) -> int:\n return x * 2\n") |
| 84 | runner = CliRunner() |
| 85 | assert runner.invoke(None, ["code", "add", "."]).exit_code == 0 |
| 86 | assert runner.invoke(None, ["commit", "-m", "v1"]).exit_code == 0 |
| 87 | |
| 88 | sid = get_head_snapshot_id(repo, "main") |
| 89 | snapshot = read_snapshot(repo, sid) |
| 90 | assert snapshot is not None |
| 91 | |
| 92 | sym_cache = SymbolCache.from_root(repo) |
| 93 | cg_cache = CallGraphCache.from_root(repo) |
| 94 | changed = [ChangedSymbol(address="prod.py::compute", change_kind="modified")] |
| 95 | select_tests(repo, changed, snapshot.manifest, cache=sym_cache, callgraph_cache=cg_cache) |
| 96 | sym_cache.save() |
| 97 | cg_cache.save() |
| 98 | |
| 99 | status = get_cache_status(repo) |
| 100 | |
| 101 | assert status["cache_hit"] is True |
| 102 | assert status["stale"] is False |
| 103 | assert status["files_cold"] == 0 |
| 104 | assert status["symbol_cache_entries"] > 0 |
| 105 | assert status["callgraph_cache_entries"] > 0 |
| 106 | assert status["symbol_cache_age_seconds"] is not None |
| 107 | assert status["symbol_cache_age_seconds"] >= 0.0 |
| 108 | assert status["callgraph_cache_age_seconds"] is not None |
| 109 | assert status["callgraph_cache_age_seconds"] >= 0.0 |
| 110 | |
| 111 | def test_status_never_triggers_a_parse( |
| 112 | self, repo: pathlib.Path, monkeypatch: pytest.MonkeyPatch |
| 113 | ) -> None: |
| 114 | """get_cache_status must be pure dict-lookup + os.stat — it must |
| 115 | never call read_object or parse_symbols, even when warm.""" |
| 116 | from unittest.mock import patch |
| 117 | |
| 118 | (repo / "prod.py").write_text("def compute(x: int) -> int:\n return x * 2\n") |
| 119 | runner = CliRunner() |
| 120 | assert runner.invoke(None, ["code", "add", "."]).exit_code == 0 |
| 121 | assert runner.invoke(None, ["commit", "-m", "v1"]).exit_code == 0 |
| 122 | |
| 123 | with ( |
| 124 | patch("muse.plugins.code._query.read_object") as mock_query_read, |
| 125 | patch("muse.plugins.code._callgraph.read_object") as mock_cg_read, |
| 126 | patch("muse.plugins.code.ast_parser.parse_symbols") as mock_parse, |
| 127 | ): |
| 128 | get_cache_status(repo) |
| 129 | |
| 130 | mock_query_read.assert_not_called() |
| 131 | mock_cg_read.assert_not_called() |
| 132 | mock_parse.assert_not_called() |