test_cmd_stress.py
python
sha256:b636f72dcba9e190afb980bece906fa5b717fbde014b76ef023df8cb96e01eb9
docs: expand cache plan with all seven testing tiers and do…
Sonnet 4.6
140 days ago
| 1 | """Stress and scale tests for Muse commands. |
| 2 | |
| 3 | These tests exercise commands at a scale that would reveal |
| 4 | O(n²) performance regressions, memory leaks, and missing edge-case |
| 5 | handling. Every test in this module is designed to complete in under |
| 6 | 10 seconds on a modern laptop when running from an in-memory temp |
| 7 | directory — if any test consistently takes longer, it signals a |
| 8 | performance regression worth investigating. |
| 9 | |
| 10 | Scenarios: |
| 11 | - commit-graph BFS on a 500-commit linear history |
| 12 | - merge-base on a 300-deep dag (shared ancestor at the root) |
| 13 | - name-rev multi-source BFS on a 200-commit diamond graph |
| 14 | - snapshot-diff on manifests with 2000 files each |
| 15 | - verify-object on 200 objects |
| 16 | - ls-files on a 2000-file snapshot |
| 17 | - for-each-ref on 100 branches |
| 18 | - show-ref on 100 branches |
| 19 | - pack-objects → unpack-objects with 100 commits and 100 objects |
| 20 | - read-commit on 200 sequential commits |
| 21 | """ |
| 22 | |
| 23 | from __future__ import annotations |
| 24 | |
| 25 | import datetime |
| 26 | import json |
| 27 | import pathlib |
| 28 | |
| 29 | from tests.cli_test_helper import CliRunner |
| 30 | |
| 31 | cli = None # argparse migration — CliRunner ignores this arg |
| 32 | from muse.core._types import blob_id, fake_id |
| 33 | from muse.core.object_store import write_object |
| 34 | from muse.core.snapshot import compute_commit_id, compute_snapshot_id |
| 35 | from muse.core.store import CommitRecord, SnapshotRecord, write_commit, write_snapshot |
| 36 | |
| 37 | runner = CliRunner() |
| 38 | |
| 39 | |
| 40 | # --------------------------------------------------------------------------- |
| 41 | # Helpers |
| 42 | # --------------------------------------------------------------------------- |
| 43 | |
| 44 | |
| 45 | def _sha(tag: str) -> str: |
| 46 | return fake_id(tag) |
| 47 | |
| 48 | |
| 49 | def _sha_bytes(data: bytes) -> str: |
| 50 | return blob_id(data) |
| 51 | |
| 52 | |
| 53 | def _init_repo(path: pathlib.Path) -> pathlib.Path: |
| 54 | muse = path / ".muse" |
| 55 | (muse / "commits").mkdir(parents=True) |
| 56 | (muse / "snapshots").mkdir(parents=True) |
| 57 | (muse / "objects").mkdir(parents=True) |
| 58 | (muse / "refs" / "heads").mkdir(parents=True) |
| 59 | (muse / "HEAD").write_text("ref: refs/heads/main", encoding="utf-8") |
| 60 | (muse / "repo.json").write_text( |
| 61 | json.dumps({"repo_id": "stress-repo", "domain": "midi"}), encoding="utf-8" |
| 62 | ) |
| 63 | return path |
| 64 | |
| 65 | |
| 66 | def _env(repo: pathlib.Path) -> Manifest: |
| 67 | return {"MUSE_REPO_ROOT": str(repo)} |
| 68 | |
| 69 | |
| 70 | def _snap(repo: pathlib.Path, manifest: Manifest | None = None, tag: str = "s") -> str: |
| 71 | """Write a snapshot with a real content-addressed ID and return it.""" |
| 72 | m = manifest or {} |
| 73 | sid = compute_snapshot_id(m) |
| 74 | write_snapshot( |
| 75 | repo, |
| 76 | SnapshotRecord( |
| 77 | snapshot_id=sid, |
| 78 | manifest=m, |
| 79 | created_at=datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc), |
| 80 | ), |
| 81 | ) |
| 82 | return sid |
| 83 | |
| 84 | |
| 85 | def _commit_raw( |
| 86 | repo: pathlib.Path, |
| 87 | cid: str, |
| 88 | sid: str, |
| 89 | message: str, |
| 90 | branch: str = "main", |
| 91 | parent: str | None = None, |
| 92 | parent2: str | None = None, |
| 93 | ) -> str: |
| 94 | """Write a commit with a real content-addressed ID and return it. |
| 95 | |
| 96 | The *cid* parameter is ignored — the real commit ID is derived from |
| 97 | *sid*, *message*, *committed_at*, and the parent IDs using the same |
| 98 | algorithm that :func:`muse.core.snapshot.compute_commit_id` uses. |
| 99 | """ |
| 100 | committed_at = datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc) |
| 101 | parent_ids = [p for p in (parent, parent2) if p is not None] |
| 102 | real_cid = compute_commit_id( |
| 103 | repo_id="stress-repo", |
| 104 | parent_ids=parent_ids, |
| 105 | snapshot_id=sid, |
| 106 | message=message, |
| 107 | committed_at_iso=committed_at.isoformat(), |
| 108 | author="stress-tester",) |
| 109 | write_commit( |
| 110 | repo, |
| 111 | CommitRecord( |
| 112 | commit_id=real_cid, |
| 113 | repo_id="stress-repo", |
| 114 | created_on_branch=branch, |
| 115 | snapshot_id=sid, |
| 116 | message=message, |
| 117 | committed_at=committed_at, |
| 118 | author="stress-tester", |
| 119 | parent_commit_id=parent, |
| 120 | parent2_commit_id=parent2, |
| 121 | ), |
| 122 | ) |
| 123 | return real_cid |
| 124 | |
| 125 | |
| 126 | def _set_branch(repo: pathlib.Path, branch: str, cid: str) -> None: |
| 127 | ref = repo / ".muse" / "refs" / "heads" / branch |
| 128 | ref.parent.mkdir(parents=True, exist_ok=True) |
| 129 | ref.write_text(cid, encoding="utf-8") |
| 130 | |
| 131 | |
| 132 | def _linear_chain(repo: pathlib.Path, n: int, sid: str, branch: str = "main") -> list[str]: |
| 133 | """Build a linear chain of n commits. Returns real commit IDs root→tip.""" |
| 134 | cids: list[str] = [] |
| 135 | parent: str | None = None |
| 136 | for i in range(n): |
| 137 | real_cid = _commit_raw(repo, "", sid, f"commit {i}", branch=branch, parent=parent) |
| 138 | cids.append(real_cid) |
| 139 | parent = real_cid |
| 140 | _set_branch(repo, branch, cids[-1]) |
| 141 | return cids |
| 142 | |
| 143 | |
| 144 | def _obj(repo: pathlib.Path, tag: str) -> str: |
| 145 | content = tag.encode() |
| 146 | oid = _sha_bytes(content) |
| 147 | write_object(repo, oid, content) |
| 148 | return oid |
| 149 | |
| 150 | |
| 151 | # --------------------------------------------------------------------------- |
| 152 | # Stress: commit-graph |
| 153 | # --------------------------------------------------------------------------- |
| 154 | |
| 155 | |
| 156 | class TestCommitGraphStress: |
| 157 | def test_500_commit_linear_chain_full_traversal(self, tmp_path: pathlib.Path) -> None: |
| 158 | repo = _init_repo(tmp_path) |
| 159 | sid = _snap(repo) |
| 160 | cids = _linear_chain(repo, 500, sid) |
| 161 | result = runner.invoke(cli, ["commit-graph", "--json"], env=_env(repo)) |
| 162 | assert result.exit_code == 0, result.output |
| 163 | data = json.loads(result.stdout) |
| 164 | assert data["count"] == 500 |
| 165 | assert data["truncated"] is False |
| 166 | |
| 167 | def test_500_commit_chain_stop_at_midpoint(self, tmp_path: pathlib.Path) -> None: |
| 168 | repo = _init_repo(tmp_path) |
| 169 | sid = _snap(repo) |
| 170 | cids = _linear_chain(repo, 500, sid) |
| 171 | result = runner.invoke( |
| 172 | cli, |
| 173 | ["commit-graph", "--json", "--tip", cids[499], "--stop-at", cids[249]], |
| 174 | env=_env(repo), |
| 175 | ) |
| 176 | assert result.exit_code == 0 |
| 177 | data = json.loads(result.stdout) |
| 178 | assert data["count"] == 250 |
| 179 | |
| 180 | def test_count_flag_on_500_commits(self, tmp_path: pathlib.Path) -> None: |
| 181 | repo = _init_repo(tmp_path) |
| 182 | sid = _snap(repo) |
| 183 | _linear_chain(repo, 500, sid) |
| 184 | result = runner.invoke(cli, ["commit-graph", "--count", "--json"], env=_env(repo)) |
| 185 | assert result.exit_code == 0 |
| 186 | data = json.loads(result.stdout) |
| 187 | assert data["count"] == 500 |
| 188 | assert "commits" not in data # --count suppresses node list |
| 189 | |
| 190 | |
| 191 | # --------------------------------------------------------------------------- |
| 192 | # Stress: merge-base |
| 193 | # --------------------------------------------------------------------------- |
| 194 | |
| 195 | |
| 196 | class TestMergeBaseStress: |
| 197 | def test_merge_base_300_deep_shared_root(self, tmp_path: pathlib.Path) -> None: |
| 198 | repo = _init_repo(tmp_path) |
| 199 | sid = _snap(repo) |
| 200 | |
| 201 | # Shared root |
| 202 | root_cid = _commit_raw(repo, "", sid, "root") |
| 203 | |
| 204 | # Two 150-commit chains from the same root |
| 205 | main_chain = [root_cid] |
| 206 | feat_chain = [root_cid] |
| 207 | for i in range(150): |
| 208 | mc = _commit_raw(repo, "", sid, f"main-{i}", branch="main", parent=main_chain[-1]) |
| 209 | main_chain.append(mc) |
| 210 | fc = _commit_raw(repo, "", sid, f"feat-{i}", branch="feat", parent=feat_chain[-1]) |
| 211 | feat_chain.append(fc) |
| 212 | |
| 213 | _set_branch(repo, "main", main_chain[-1]) |
| 214 | _set_branch(repo, "feat", feat_chain[-1]) |
| 215 | (repo / ".muse" / "HEAD").write_text("ref: refs/heads/main", encoding="utf-8") |
| 216 | |
| 217 | result = runner.invoke( |
| 218 | cli, ["merge-base", "--json", "main", "feat"], env=_env(repo) |
| 219 | ) |
| 220 | assert result.exit_code == 0 |
| 221 | data = json.loads(result.stdout) |
| 222 | assert data["merge_base"] == root_cid |
| 223 | |
| 224 | |
| 225 | # --------------------------------------------------------------------------- |
| 226 | # Stress: name-rev |
| 227 | # --------------------------------------------------------------------------- |
| 228 | |
| 229 | |
| 230 | class TestNameRevStress: |
| 231 | def test_name_rev_200_commit_chain_all_named(self, tmp_path: pathlib.Path) -> None: |
| 232 | repo = _init_repo(tmp_path) |
| 233 | sid = _snap(repo) |
| 234 | cids = _linear_chain(repo, 200, sid) |
| 235 | |
| 236 | result = runner.invoke(cli, ["name-rev", "--json", *cids], env=_env(repo)) |
| 237 | assert result.exit_code == 0 |
| 238 | data = json.loads(result.stdout) |
| 239 | assert len(data["results"]) == 200 |
| 240 | for entry in data["results"]: |
| 241 | assert not entry["undefined"] |
| 242 | |
| 243 | def test_name_rev_tip_has_no_tilde_suffix(self, tmp_path: pathlib.Path) -> None: |
| 244 | """distance=0 means the tip is the branch tip itself; name is bare branch name.""" |
| 245 | repo = _init_repo(tmp_path) |
| 246 | sid = _snap(repo) |
| 247 | cids = _linear_chain(repo, 10, sid) |
| 248 | tip = cids[-1] |
| 249 | |
| 250 | result = runner.invoke(cli, ["name-rev", "--json", tip], env=_env(repo)) |
| 251 | assert result.exit_code == 0 |
| 252 | entry = json.loads(result.stdout)["results"][0] |
| 253 | # name-rev emits "<branch>" (no ~0) for the exact branch tip. |
| 254 | assert entry["name"] == "main" |
| 255 | assert entry["distance"] == 0 |
| 256 | |
| 257 | |
| 258 | # --------------------------------------------------------------------------- |
| 259 | # Stress: snapshot-diff |
| 260 | # --------------------------------------------------------------------------- |
| 261 | |
| 262 | |
| 263 | class TestSnapshotDiffStress: |
| 264 | def test_diff_2000_file_manifests(self, tmp_path: pathlib.Path) -> None: |
| 265 | repo = _init_repo(tmp_path) |
| 266 | oid = _sha("shared-blob") |
| 267 | |
| 268 | # Manifest A: 2000 files |
| 269 | manifest_a = {f"track_{i:04d}.mid": oid for i in range(2000)} |
| 270 | # Manifest B: same 2000 files but first 200 have new IDs (modified) |
| 271 | new_oid = _sha("new-blob") |
| 272 | manifest_b = {f"track_{i:04d}.mid": (new_oid if i < 200 else oid) for i in range(2000)} |
| 273 | |
| 274 | sid_a = compute_snapshot_id(manifest_a) |
| 275 | sid_b = compute_snapshot_id(manifest_b) |
| 276 | write_snapshot( |
| 277 | repo, |
| 278 | SnapshotRecord( |
| 279 | snapshot_id=sid_a, |
| 280 | manifest=manifest_a, |
| 281 | created_at=datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc), |
| 282 | ), |
| 283 | ) |
| 284 | write_snapshot( |
| 285 | repo, |
| 286 | SnapshotRecord( |
| 287 | snapshot_id=sid_b, |
| 288 | manifest=manifest_b, |
| 289 | created_at=datetime.datetime(2026, 1, 2, tzinfo=datetime.timezone.utc), |
| 290 | ), |
| 291 | ) |
| 292 | |
| 293 | result = runner.invoke(cli, ["snapshot-diff", "--json", sid_a, sid_b], env=_env(repo)) |
| 294 | assert result.exit_code == 0 |
| 295 | data = json.loads(result.stdout) |
| 296 | assert data["total_changes"] == 200 |
| 297 | assert len(data["modified"]) == 200 |
| 298 | assert data["added"] == [] |
| 299 | assert data["deleted"] == [] |
| 300 | |
| 301 | |
| 302 | # --------------------------------------------------------------------------- |
| 303 | # Stress: verify-object |
| 304 | # --------------------------------------------------------------------------- |
| 305 | |
| 306 | |
| 307 | class TestVerifyObjectStress: |
| 308 | def test_200_objects_all_verified(self, tmp_path: pathlib.Path) -> None: |
| 309 | repo = _init_repo(tmp_path) |
| 310 | oids = [_obj(repo, f"stress-obj-{i}") for i in range(200)] |
| 311 | result = runner.invoke(cli, ["verify-object", "--json", *oids], env=_env(repo)) |
| 312 | assert result.exit_code == 0 |
| 313 | data = json.loads(result.stdout) |
| 314 | assert data["all_ok"] is True |
| 315 | assert data["checked"] == 200 |
| 316 | assert data["failed"] == 0 |
| 317 | |
| 318 | def test_verify_1mib_object_no_crash(self, tmp_path: pathlib.Path) -> None: |
| 319 | repo = _init_repo(tmp_path) |
| 320 | content = b"Z" * (1024 * 1024) |
| 321 | oid = _sha_bytes(content) |
| 322 | write_object(repo, oid, content) |
| 323 | result = runner.invoke(cli, ["verify-object", "--json", oid], env=_env(repo)) |
| 324 | assert result.exit_code == 0 |
| 325 | assert json.loads(result.stdout)["all_ok"] is True |
| 326 | |
| 327 | |
| 328 | # --------------------------------------------------------------------------- |
| 329 | # Stress: ls-files |
| 330 | # --------------------------------------------------------------------------- |
| 331 | |
| 332 | |
| 333 | class TestLsFilesStress: |
| 334 | def test_ls_files_2000_file_snapshot(self, tmp_path: pathlib.Path) -> None: |
| 335 | repo = _init_repo(tmp_path) |
| 336 | oid = _sha("common-oid") |
| 337 | manifest = {f"track_{i:04d}.mid": oid for i in range(2000)} |
| 338 | sid = _snap(repo, manifest, "big") |
| 339 | cid = _commit_raw(repo, "", sid, "big manifest", branch="main") |
| 340 | _set_branch(repo, "main", cid) |
| 341 | |
| 342 | result = runner.invoke(cli, ["ls-files", "--json"], env=_env(repo)) |
| 343 | assert result.exit_code == 0 |
| 344 | data = json.loads(result.stdout) |
| 345 | assert data["file_count"] == 2000 |
| 346 | |
| 347 | |
| 348 | # --------------------------------------------------------------------------- |
| 349 | # Stress: for-each-ref and show-ref |
| 350 | # --------------------------------------------------------------------------- |
| 351 | |
| 352 | |
| 353 | class TestRefCommandsStress: |
| 354 | def _build_100_branches(self, repo: pathlib.Path) -> None: |
| 355 | sid = _snap(repo, tag="multi-branch") |
| 356 | for i in range(100): |
| 357 | branch = f"feature-{i:03d}" |
| 358 | cid = _commit_raw(repo, "", sid, f"tip of {branch}", branch=branch) |
| 359 | _set_branch(repo, branch, cid) |
| 360 | |
| 361 | def test_for_each_ref_100_branches(self, tmp_path: pathlib.Path) -> None: |
| 362 | repo = _init_repo(tmp_path) |
| 363 | self._build_100_branches(repo) |
| 364 | result = runner.invoke(cli, ["for-each-ref", "--json"], env=_env(repo)) |
| 365 | assert result.exit_code == 0 |
| 366 | data = json.loads(result.stdout) |
| 367 | assert len(data["refs"]) == 100 |
| 368 | |
| 369 | def test_show_ref_100_branches(self, tmp_path: pathlib.Path) -> None: |
| 370 | repo = _init_repo(tmp_path) |
| 371 | self._build_100_branches(repo) |
| 372 | result = runner.invoke(cli, ["show-ref", "--json"], env=_env(repo)) |
| 373 | assert result.exit_code == 0 |
| 374 | data = json.loads(result.stdout) |
| 375 | assert data["count"] == 100 |
| 376 | |
| 377 | def test_for_each_ref_pattern_filter_on_100(self, tmp_path: pathlib.Path) -> None: |
| 378 | repo = _init_repo(tmp_path) |
| 379 | self._build_100_branches(repo) |
| 380 | result = runner.invoke( |
| 381 | cli, |
| 382 | ["for-each-ref", "--json", "--pattern", "refs/heads/feature-00*"], |
| 383 | env=_env(repo), |
| 384 | ) |
| 385 | assert result.exit_code == 0 |
| 386 | data = json.loads(result.stdout) |
| 387 | # feature-000 through feature-009 = 10 branches |
| 388 | assert len(data["refs"]) == 10 |
| 389 | |
| 390 | |
| 391 | # --------------------------------------------------------------------------- |
| 392 | # Stress: pack-objects → unpack-objects |
| 393 | # --------------------------------------------------------------------------- |
| 394 | |
| 395 | |
| 396 | class TestPackUnpackStress: |
| 397 | def test_100_commit_100_object_round_trip(self, tmp_path: pathlib.Path) -> None: |
| 398 | from muse.core.object_store import has_object |
| 399 | from muse.core.store import read_commit |
| 400 | |
| 401 | src = _init_repo(tmp_path / "src") |
| 402 | dst = _init_repo(tmp_path / "dst") |
| 403 | |
| 404 | # Build 100 objects |
| 405 | oids = [_obj(src, f"blob-{i}") for i in range(100)] |
| 406 | manifest = {f"f{i}.mid": oids[i] for i in range(100)} |
| 407 | sid = _snap(src, manifest, "big-pack") |
| 408 | |
| 409 | # Build 100-commit linear chain referencing that snapshot |
| 410 | parent: str | None = None |
| 411 | cids: list[str] = [] |
| 412 | for i in range(100): |
| 413 | cid = _commit_raw(src, "", sid, f"pack-{i}", parent=parent) |
| 414 | cids.append(cid) |
| 415 | parent = cid |
| 416 | _set_branch(src, "main", cids[-1]) |
| 417 | |
| 418 | # Pack tip → unpack into dst |
| 419 | pack_result = runner.invoke( |
| 420 | cli, ["pack-objects", cids[-1]], env=_env(src) |
| 421 | ) |
| 422 | assert pack_result.exit_code == 0 |
| 423 | |
| 424 | unpack_result = runner.invoke( |
| 425 | cli, |
| 426 | ["unpack-objects", "--json"], |
| 427 | input=pack_result.stdout_bytes, |
| 428 | env=_env(dst), |
| 429 | ) |
| 430 | assert unpack_result.exit_code == 0 |
| 431 | counts = json.loads(unpack_result.stdout) |
| 432 | assert counts["commits_written"] == 100 |
| 433 | assert counts["objects_written"] == 100 |
| 434 | |
| 435 | for cid in cids: |
| 436 | assert read_commit(dst, cid) is not None |
| 437 | for oid in oids: |
| 438 | assert has_object(dst, oid) |
| 439 | |
| 440 | |
| 441 | # --------------------------------------------------------------------------- |
| 442 | # Stress: read-commit sequential |
| 443 | # --------------------------------------------------------------------------- |
| 444 | |
| 445 | |
| 446 | class TestReadCommitStress: |
| 447 | def test_200_commits_all_readable(self, tmp_path: pathlib.Path) -> None: |
| 448 | repo = _init_repo(tmp_path) |
| 449 | sid = _snap(repo) |
| 450 | cids = _linear_chain(repo, 200, sid) |
| 451 | for cid in cids: |
| 452 | result = runner.invoke(cli, ["read-commit", "--json", cid], env=_env(repo)) |
| 453 | assert result.exit_code == 0 |
| 454 | data = json.loads(result.stdout) |
| 455 | assert data["commit_id"] == cid |
File History
3 commits
sha256:b636f72dcba9e190afb980bece906fa5b717fbde014b76ef023df8cb96e01eb9
docs: expand cache plan with all seven testing tiers and do…
Sonnet 4.6
140 days ago
sha256:7f9e2ef5286aedad9c1e6011b4c46ca27f39dbdad6e3409357e36b26e46b3b7c
docs: docstring sprint for-each-ref→hotspots — idiomatic ru…
Sonnet 4.6
patch
146 days ago
sha256:a09b1b4f6838754495547f200aa0ce88e2f56ffc5b20b900f6f0cff2c3cdede9
fix(cursorignore): remove git-ism (.git/worktrees)
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149 days ago