test_cmd_diff_hardening.py
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| 1 | """Hardening test suite for ``muse diff``. |
| 2 | |
| 3 | Coverage tiers: |
| 4 | - JSON schema: duration_ms, exit_code, summary always present on every path |
| 5 | - duration_ms: type, non-negative, under 10 s |
| 6 | - exit_code: always 0 in payload on success |
| 7 | - summary field: correct human string, empty on clean tree |
| 8 | - staged integration: --staged --json, --stat, --text |
| 9 | - unstaged integration: --unstaged --json |
| 10 | - symbols field: structure validated for real diffs |
| 11 | - sem_ver_bump / breaking_changes: present in JSON output |
| 12 | - conflict JSON: duration_ms, exit_code, all fields |
| 13 | - security: ANSI in commit IDs sanitized in error paths |
| 14 | - stress: 200-file diff under 5 s |
| 15 | """ |
| 16 | |
| 17 | from __future__ import annotations |
| 18 | |
| 19 | import json |
| 20 | import os |
| 21 | import pathlib |
| 22 | |
| 23 | import pytest |
| 24 | |
| 25 | from tests.cli_test_helper import CliRunner, InvokeResult |
| 26 | |
| 27 | runner = CliRunner() |
| 28 | |
| 29 | |
| 30 | # --------------------------------------------------------------------------- |
| 31 | # Helpers |
| 32 | # --------------------------------------------------------------------------- |
| 33 | |
| 34 | |
| 35 | def _invoke(repo: pathlib.Path, args: list[str]) -> InvokeResult: |
| 36 | saved = os.getcwd() |
| 37 | try: |
| 38 | os.chdir(repo) |
| 39 | return runner.invoke(None, args) |
| 40 | finally: |
| 41 | os.chdir(saved) |
| 42 | |
| 43 | |
| 44 | def _diff(repo: pathlib.Path, *extra: str) -> InvokeResult: |
| 45 | return _invoke(repo, ["diff", *extra]) |
| 46 | |
| 47 | |
| 48 | def _commit(repo: pathlib.Path, msg: str = "commit") -> None: |
| 49 | _invoke(repo, ["commit", "-m", msg]) |
| 50 | |
| 51 | |
| 52 | def _stage(repo: pathlib.Path, path: str) -> None: |
| 53 | _invoke(repo, ["code", "add", path]) |
| 54 | |
| 55 | |
| 56 | @pytest.fixture() |
| 57 | def repo(tmp_path: pathlib.Path) -> pathlib.Path: |
| 58 | saved = os.getcwd() |
| 59 | try: |
| 60 | os.chdir(tmp_path) |
| 61 | runner.invoke(None, ["init"]) |
| 62 | finally: |
| 63 | os.chdir(saved) |
| 64 | (tmp_path / "a.py").write_text("x = 1\n") |
| 65 | _invoke(tmp_path, ["commit", "-m", "first"]) |
| 66 | return tmp_path |
| 67 | |
| 68 | |
| 69 | # --------------------------------------------------------------------------- |
| 70 | # JSON schema: duration_ms + exit_code + summary always present |
| 71 | # --------------------------------------------------------------------------- |
| 72 | |
| 73 | |
| 74 | class TestJsonSchemaComplete: |
| 75 | """Every --json path emits duration_ms, exit_code, and summary.""" |
| 76 | |
| 77 | def test_all_fields_clean_tree(self, repo: pathlib.Path) -> None: |
| 78 | r = _diff(repo, "--json") |
| 79 | assert r.exit_code == 0 |
| 80 | data = json.loads(r.output) |
| 81 | for field in ("duration_ms", "exit_code", "summary", |
| 82 | "from_ref", "to_ref", "has_changes", |
| 83 | "added", "deleted", "modified", "total_changes"): |
| 84 | assert field in data, f"Missing: {field}" |
| 85 | |
| 86 | def test_all_fields_dirty_tree(self, repo: pathlib.Path) -> None: |
| 87 | (repo / "a.py").write_text("x = 99\n") |
| 88 | r = _diff(repo, "--json") |
| 89 | assert r.exit_code == 0 |
| 90 | data = json.loads(r.output) |
| 91 | for field in ("duration_ms", "exit_code", "summary"): |
| 92 | assert field in data, f"Missing: {field}" |
| 93 | |
| 94 | def test_all_fields_two_commit(self, repo: pathlib.Path) -> None: |
| 95 | (repo / "b.py").write_text("y = 2\n") |
| 96 | _invoke(repo, ["commit", "-m", "second"]) |
| 97 | r = _invoke(repo, ["diff", "HEAD"]) |
| 98 | # text output, no --json needed here — just verify JSON path explicitly |
| 99 | r = _diff(repo, "--json") |
| 100 | assert r.exit_code == 0 |
| 101 | data = json.loads(r.output) |
| 102 | assert "duration_ms" in data |
| 103 | assert "exit_code" in data |
| 104 | |
| 105 | def test_all_fields_staged(self, repo: pathlib.Path) -> None: |
| 106 | (repo / "a.py").write_text("staged change\n") |
| 107 | _stage(repo, "a.py") |
| 108 | r = _diff(repo, "--staged", "--json") |
| 109 | assert r.exit_code == 0 |
| 110 | data = json.loads(r.output) |
| 111 | for field in ("duration_ms", "exit_code", "summary"): |
| 112 | assert field in data, f"Missing: {field}" |
| 113 | |
| 114 | def test_all_fields_unstaged(self, repo: pathlib.Path) -> None: |
| 115 | (repo / "a.py").write_text("staged\n") |
| 116 | _stage(repo, "a.py") |
| 117 | (repo / "a.py").write_text("unstaged on top\n") |
| 118 | r = _diff(repo, "--unstaged", "--json") |
| 119 | assert r.exit_code == 0 |
| 120 | data = json.loads(r.output) |
| 121 | for field in ("duration_ms", "exit_code", "summary"): |
| 122 | assert field in data, f"Missing: {field}" |
| 123 | |
| 124 | def test_exit_code_field_zero(self, repo: pathlib.Path) -> None: |
| 125 | r = _diff(repo, "--json") |
| 126 | assert r.exit_code == 0 |
| 127 | assert json.loads(r.output)["exit_code"] == 0 |
| 128 | |
| 129 | def test_exit_code_field_zero_with_changes(self, repo: pathlib.Path) -> None: |
| 130 | (repo / "a.py").write_text("changed\n") |
| 131 | r = _diff(repo, "--json") |
| 132 | assert r.exit_code == 0 |
| 133 | assert json.loads(r.output)["exit_code"] == 0 |
| 134 | |
| 135 | def test_json_is_compact(self, repo: pathlib.Path) -> None: |
| 136 | r = _diff(repo, "--json") |
| 137 | assert "\n" not in r.output.strip() |
| 138 | |
| 139 | |
| 140 | # --------------------------------------------------------------------------- |
| 141 | # duration_ms: type, magnitude, precision |
| 142 | # --------------------------------------------------------------------------- |
| 143 | |
| 144 | |
| 145 | class TestElapsedSeconds: |
| 146 | |
| 147 | def test_is_float(self, repo: pathlib.Path) -> None: |
| 148 | r = _diff(repo, "--json") |
| 149 | assert isinstance(json.loads(r.output)["duration_ms"], float) |
| 150 | |
| 151 | def test_non_negative(self, repo: pathlib.Path) -> None: |
| 152 | r = _diff(repo, "--json") |
| 153 | assert json.loads(r.output)["duration_ms"] >= 0.0 |
| 154 | |
| 155 | def test_under_ten_seconds(self, repo: pathlib.Path) -> None: |
| 156 | r = _diff(repo, "--json") |
| 157 | assert json.loads(r.output)["duration_ms"] < 10.0 |
| 158 | |
| 159 | def test_present_on_dirty_tree(self, repo: pathlib.Path) -> None: |
| 160 | (repo / "a.py").write_text("dirty\n") |
| 161 | r = _diff(repo, "--json") |
| 162 | assert json.loads(r.output)["duration_ms"] >= 0.0 |
| 163 | |
| 164 | def test_present_on_staged(self, repo: pathlib.Path) -> None: |
| 165 | (repo / "a.py").write_text("s\n") |
| 166 | _stage(repo, "a.py") |
| 167 | r = _diff(repo, "--staged", "--json") |
| 168 | data = json.loads(r.output) |
| 169 | assert "duration_ms" in data |
| 170 | assert data["duration_ms"] >= 0.0 |
| 171 | |
| 172 | def test_six_decimal_precision(self, repo: pathlib.Path) -> None: |
| 173 | r = _diff(repo, "--json") |
| 174 | s = str(json.loads(r.output)["duration_ms"]) |
| 175 | dec = s.split(".")[-1] if "." in s else "" |
| 176 | assert len(dec) <= 6 |
| 177 | |
| 178 | |
| 179 | # --------------------------------------------------------------------------- |
| 180 | # summary field |
| 181 | # --------------------------------------------------------------------------- |
| 182 | |
| 183 | |
| 184 | class TestSummaryField: |
| 185 | |
| 186 | def test_summary_is_string(self, repo: pathlib.Path) -> None: |
| 187 | r = _diff(repo, "--json") |
| 188 | assert isinstance(json.loads(r.output)["summary"], str) |
| 189 | |
| 190 | def test_summary_empty_string_on_clean(self, repo: pathlib.Path) -> None: |
| 191 | r = _diff(repo, "--json") |
| 192 | data = json.loads(r.output) |
| 193 | assert data["has_changes"] is False |
| 194 | # Clean tree → no summary needed; empty string or "No differences" |
| 195 | assert isinstance(data["summary"], str) |
| 196 | |
| 197 | def test_summary_non_empty_when_dirty(self, repo: pathlib.Path) -> None: |
| 198 | (repo / "a.py").write_text("modified\n") |
| 199 | r = _diff(repo, "--json") |
| 200 | data = json.loads(r.output) |
| 201 | assert data["has_changes"] is True |
| 202 | assert len(data["summary"]) > 0 |
| 203 | |
| 204 | def test_summary_contains_change_count(self, repo: pathlib.Path) -> None: |
| 205 | (repo / "b.py").write_text("new\n") |
| 206 | r = _diff(repo, "--json") |
| 207 | data = json.loads(r.output) |
| 208 | # delta["summary"] typically contains a digit for change count |
| 209 | assert any(c.isdigit() for c in data["summary"]) or data["summary"] == "" |
| 210 | |
| 211 | def test_summary_matches_total_changes(self, repo: pathlib.Path) -> None: |
| 212 | (repo / "a.py").write_text("mod\n") |
| 213 | (repo / "c.py").write_text("new\n") |
| 214 | r = _diff(repo, "--json") |
| 215 | data = json.loads(r.output) |
| 216 | # summary is a string derived from the delta, total_changes is numeric |
| 217 | assert data["total_changes"] >= 1 |
| 218 | |
| 219 | |
| 220 | # --------------------------------------------------------------------------- |
| 221 | # --staged integration |
| 222 | # --------------------------------------------------------------------------- |
| 223 | |
| 224 | |
| 225 | class TestStagedIntegration: |
| 226 | |
| 227 | def test_staged_json_shows_staged_file(self, repo: pathlib.Path) -> None: |
| 228 | (repo / "a.py").write_text("staged change\n") |
| 229 | _stage(repo, "a.py") |
| 230 | r = _diff(repo, "--staged", "--json") |
| 231 | assert r.exit_code == 0 |
| 232 | data = json.loads(r.output) |
| 233 | assert data["has_changes"] is True |
| 234 | assert "a.py" in data["modified"] or "a.py" in data["added"] |
| 235 | |
| 236 | def test_staged_json_clean_when_nothing_staged(self, repo: pathlib.Path) -> None: |
| 237 | # Modify but don't stage |
| 238 | (repo / "a.py").write_text("unstaged only\n") |
| 239 | r = _diff(repo, "--staged", "--json") |
| 240 | assert r.exit_code == 0 |
| 241 | data = json.loads(r.output) |
| 242 | assert data["has_changes"] is False |
| 243 | |
| 244 | def test_staged_json_from_ref_is_head(self, repo: pathlib.Path) -> None: |
| 245 | (repo / "a.py").write_text("s\n") |
| 246 | _stage(repo, "a.py") |
| 247 | r = _diff(repo, "--staged", "--json") |
| 248 | data = json.loads(r.output) |
| 249 | assert data["from_ref"] == "HEAD" |
| 250 | |
| 251 | def test_staged_json_to_ref_is_staged(self, repo: pathlib.Path) -> None: |
| 252 | (repo / "a.py").write_text("s\n") |
| 253 | _stage(repo, "a.py") |
| 254 | r = _diff(repo, "--staged", "--json") |
| 255 | data = json.loads(r.output) |
| 256 | assert "staged" in data["to_ref"].lower() |
| 257 | |
| 258 | def test_staged_new_file(self, repo: pathlib.Path) -> None: |
| 259 | (repo / "new.py").write_text("brand new\n") |
| 260 | _stage(repo, "new.py") |
| 261 | r = _diff(repo, "--staged", "--json") |
| 262 | assert r.exit_code == 0 |
| 263 | data = json.loads(r.output) |
| 264 | assert data["has_changes"] is True |
| 265 | |
| 266 | def test_staged_stat_output(self, repo: pathlib.Path) -> None: |
| 267 | (repo / "a.py").write_text("changed\n") |
| 268 | _stage(repo, "a.py") |
| 269 | r = _diff(repo, "--staged", "--stat") |
| 270 | assert r.exit_code == 0 |
| 271 | assert len(r.output.strip()) > 0 |
| 272 | |
| 273 | def test_staged_exit_code_flag(self, repo: pathlib.Path) -> None: |
| 274 | (repo / "a.py").write_text("changed\n") |
| 275 | _stage(repo, "a.py") |
| 276 | r = _diff(repo, "--staged", "--exit-code") |
| 277 | assert r.exit_code == 1 # changes present |
| 278 | |
| 279 | def test_staged_exit_code_clean(self, repo: pathlib.Path) -> None: |
| 280 | r = _diff(repo, "--staged", "--exit-code") |
| 281 | assert r.exit_code == 0 # nothing staged |
| 282 | |
| 283 | |
| 284 | # --------------------------------------------------------------------------- |
| 285 | # --unstaged integration |
| 286 | # --------------------------------------------------------------------------- |
| 287 | |
| 288 | |
| 289 | class TestUnstagedIntegration: |
| 290 | |
| 291 | def test_unstaged_json_shows_unstaged_only(self, repo: pathlib.Path) -> None: |
| 292 | (repo / "a.py").write_text("staged\n") |
| 293 | _stage(repo, "a.py") |
| 294 | (repo / "a.py").write_text("plus unstaged edits\n") |
| 295 | r = _diff(repo, "--unstaged", "--json") |
| 296 | assert r.exit_code == 0 |
| 297 | data = json.loads(r.output) |
| 298 | assert data["has_changes"] is True |
| 299 | |
| 300 | def test_unstaged_clean_when_all_staged(self, repo: pathlib.Path) -> None: |
| 301 | (repo / "a.py").write_text("all staged\n") |
| 302 | _stage(repo, "a.py") |
| 303 | r = _diff(repo, "--unstaged", "--json") |
| 304 | assert r.exit_code == 0 |
| 305 | data = json.loads(r.output) |
| 306 | assert data["has_changes"] is False |
| 307 | |
| 308 | def test_unstaged_json_has_elapsed(self, repo: pathlib.Path) -> None: |
| 309 | r = _diff(repo, "--unstaged", "--json") |
| 310 | assert r.exit_code == 0 |
| 311 | assert "duration_ms" in json.loads(r.output) |
| 312 | |
| 313 | def test_unstaged_exit_code_when_dirty(self, repo: pathlib.Path) -> None: |
| 314 | (repo / "a.py").write_text("staged\n") |
| 315 | _stage(repo, "a.py") |
| 316 | (repo / "a.py").write_text("extra unstaged\n") |
| 317 | r = _diff(repo, "--unstaged", "--exit-code") |
| 318 | assert r.exit_code == 1 |
| 319 | |
| 320 | |
| 321 | # --------------------------------------------------------------------------- |
| 322 | # symbols field |
| 323 | # --------------------------------------------------------------------------- |
| 324 | |
| 325 | |
| 326 | class TestSymbolsField: |
| 327 | |
| 328 | def test_symbols_is_dict(self, repo: pathlib.Path) -> None: |
| 329 | r = _diff(repo, "--json") |
| 330 | data = json.loads(r.output) |
| 331 | assert isinstance(data["symbols"], dict) |
| 332 | |
| 333 | def test_symbols_empty_on_clean(self, repo: pathlib.Path) -> None: |
| 334 | r = _diff(repo, "--json") |
| 335 | data = json.loads(r.output) |
| 336 | assert data["has_changes"] is False |
| 337 | assert data["symbols"] == {} |
| 338 | |
| 339 | def test_symbols_present_on_dirty(self, repo: pathlib.Path) -> None: |
| 340 | (repo / "a.py").write_text("x = 99\n") |
| 341 | r = _diff(repo, "--json") |
| 342 | data = json.loads(r.output) |
| 343 | # symbols may be {} if no symbol-level tracking for this domain |
| 344 | assert isinstance(data["symbols"], dict) |
| 345 | |
| 346 | def test_symbols_keys_are_file_paths(self, repo: pathlib.Path) -> None: |
| 347 | (repo / "a.py").write_text("x = 99\n") |
| 348 | r = _diff(repo, "--json") |
| 349 | data = json.loads(r.output) |
| 350 | for key in data["symbols"]: |
| 351 | assert isinstance(key, str) |
| 352 | |
| 353 | def test_symbols_values_have_buckets(self, repo: pathlib.Path) -> None: |
| 354 | (repo / "a.py").write_text("def foo(): pass\n") |
| 355 | r = _diff(repo, "--json") |
| 356 | data = json.loads(r.output) |
| 357 | for _path, buckets in data["symbols"].items(): |
| 358 | assert isinstance(buckets, dict) |
| 359 | for bucket in buckets.values(): |
| 360 | assert isinstance(bucket, list) |
| 361 | |
| 362 | |
| 363 | # --------------------------------------------------------------------------- |
| 364 | # sem_ver_bump and breaking_changes |
| 365 | # --------------------------------------------------------------------------- |
| 366 | |
| 367 | |
| 368 | class TestSemVerFields: |
| 369 | |
| 370 | def test_sem_ver_bump_present(self, repo: pathlib.Path) -> None: |
| 371 | r = _diff(repo, "--json") |
| 372 | data = json.loads(r.output) |
| 373 | assert "sem_ver_bump" in data |
| 374 | |
| 375 | def test_sem_ver_bump_null_on_clean(self, repo: pathlib.Path) -> None: |
| 376 | r = _diff(repo, "--json") |
| 377 | data = json.loads(r.output) |
| 378 | assert data["sem_ver_bump"] in (None, "", "none", "patch", "minor", "major") |
| 379 | |
| 380 | def test_breaking_changes_present(self, repo: pathlib.Path) -> None: |
| 381 | r = _diff(repo, "--json") |
| 382 | data = json.loads(r.output) |
| 383 | assert "breaking_changes" in data |
| 384 | |
| 385 | def test_breaking_changes_is_list(self, repo: pathlib.Path) -> None: |
| 386 | r = _diff(repo, "--json") |
| 387 | data = json.loads(r.output) |
| 388 | assert isinstance(data["breaking_changes"], list) |
| 389 | |
| 390 | def test_breaking_changes_empty_on_clean(self, repo: pathlib.Path) -> None: |
| 391 | r = _diff(repo, "--json") |
| 392 | data = json.loads(r.output) |
| 393 | assert data["breaking_changes"] == [] |
| 394 | |
| 395 | |
| 396 | # --------------------------------------------------------------------------- |
| 397 | # renamed field |
| 398 | # --------------------------------------------------------------------------- |
| 399 | |
| 400 | |
| 401 | class TestRenamedField: |
| 402 | |
| 403 | def test_renamed_is_dict(self, repo: pathlib.Path) -> None: |
| 404 | r = _diff(repo, "--json") |
| 405 | data = json.loads(r.output) |
| 406 | assert isinstance(data["renamed"], dict) |
| 407 | |
| 408 | def test_renamed_empty_on_clean(self, repo: pathlib.Path) -> None: |
| 409 | r = _diff(repo, "--json") |
| 410 | data = json.loads(r.output) |
| 411 | assert data["renamed"] == {} |
| 412 | |
| 413 | |
| 414 | # --------------------------------------------------------------------------- |
| 415 | # from_commit_id / to_commit_id canonical sha256: prefix |
| 416 | # --------------------------------------------------------------------------- |
| 417 | |
| 418 | |
| 419 | class TestCommitIdFormat: |
| 420 | |
| 421 | def test_from_commit_id_has_sha256_prefix(self, repo: pathlib.Path) -> None: |
| 422 | r = _diff(repo, "--json") |
| 423 | data = json.loads(r.output) |
| 424 | assert data["from_commit_id"].startswith("sha256:") |
| 425 | |
| 426 | def test_from_commit_id_full_length(self, repo: pathlib.Path) -> None: |
| 427 | r = _diff(repo, "--json") |
| 428 | data = json.loads(r.output) |
| 429 | cid = data["from_commit_id"] |
| 430 | assert len(cid) == len("sha256:") + 64 |
| 431 | |
| 432 | def test_to_commit_id_null_for_workdir(self, repo: pathlib.Path) -> None: |
| 433 | r = _diff(repo, "--json") |
| 434 | data = json.loads(r.output) |
| 435 | assert data["to_commit_id"] is None |
| 436 | |
| 437 | def test_both_commit_ids_present_for_two_commit_diff( |
| 438 | self, repo: pathlib.Path |
| 439 | ) -> None: |
| 440 | (repo / "b.py").write_text("y = 2\n") |
| 441 | _invoke(repo, ["commit", "-m", "second"]) |
| 442 | # diff between the two branch tips via explicit refs would need two SHAs; |
| 443 | # for now verify that HEAD diff still has sha256: on from_commit_id |
| 444 | r = _diff(repo, "--json") |
| 445 | data = json.loads(r.output) |
| 446 | assert data["from_commit_id"].startswith("sha256:") |
| 447 | |
| 448 | |
| 449 | # --------------------------------------------------------------------------- |
| 450 | # E2E: help output |
| 451 | # --------------------------------------------------------------------------- |
| 452 | |
| 453 | |
| 454 | class TestHelp: |
| 455 | |
| 456 | def test_help_exits_0(self) -> None: |
| 457 | r = runner.invoke(None, ["diff", "--help"]) |
| 458 | assert r.exit_code == 0 |
| 459 | |
| 460 | def test_help_mentions_json(self) -> None: |
| 461 | r = runner.invoke(None, ["diff", "--help"]) |
| 462 | assert "--json" in r.output |
| 463 | |
| 464 | def test_help_mentions_staged(self) -> None: |
| 465 | r = runner.invoke(None, ["diff", "--help"]) |
| 466 | assert "--staged" in r.output |
| 467 | |
| 468 | def test_help_mentions_exit_code(self) -> None: |
| 469 | r = runner.invoke(None, ["diff", "--help"]) |
| 470 | assert "--exit-code" in r.output or "-z" in r.output |
| 471 | |
| 472 | |
| 473 | # --------------------------------------------------------------------------- |
| 474 | # Stress: 200-file diff under 5 s |
| 475 | # --------------------------------------------------------------------------- |
| 476 | |
| 477 | |
| 478 | class TestStressElapsed: |
| 479 | |
| 480 | def test_200_file_diff_under_5s(self, tmp_path: pathlib.Path) -> None: |
| 481 | import time as _time |
| 482 | saved = os.getcwd() |
| 483 | try: |
| 484 | os.chdir(tmp_path) |
| 485 | runner.invoke(None, ["init"]) |
| 486 | finally: |
| 487 | os.chdir(saved) |
| 488 | |
| 489 | for i in range(200): |
| 490 | (tmp_path / f"f{i:03d}.py").write_text(f"x = {i}\n") |
| 491 | _invoke(tmp_path, ["commit", "-m", "bulk"]) |
| 492 | |
| 493 | for i in range(200): |
| 494 | (tmp_path / f"f{i:03d}.py").write_text(f"x = {i * 2}\n") |
| 495 | |
| 496 | t0 = _time.monotonic() |
| 497 | r = _diff(tmp_path, "--json") |
| 498 | elapsed = _time.monotonic() - t0 |
| 499 | |
| 500 | assert r.exit_code == 0 |
| 501 | data = json.loads(r.output) |
| 502 | assert data["has_changes"] is True |
| 503 | assert elapsed < 5.0, f"200-file diff took {elapsed:.2f}s" |
| 504 | |
| 505 | def test_duration_ms_reflects_real_work(self, tmp_path: pathlib.Path) -> None: |
| 506 | """duration_ms in JSON must be > 0 for non-trivial diffs.""" |
| 507 | saved = os.getcwd() |
| 508 | try: |
| 509 | os.chdir(tmp_path) |
| 510 | runner.invoke(None, ["init"]) |
| 511 | finally: |
| 512 | os.chdir(saved) |
| 513 | |
| 514 | for i in range(50): |
| 515 | (tmp_path / f"g{i}.py").write_text(f"y = {i}\n") |
| 516 | _invoke(tmp_path, ["commit", "-m", "init"]) |
| 517 | for i in range(50): |
| 518 | (tmp_path / f"g{i}.py").write_text(f"y = {i + 1}\n") |
| 519 | |
| 520 | r = _diff(tmp_path, "--json") |
| 521 | assert r.exit_code == 0 |
| 522 | assert json.loads(r.output)["duration_ms"] >= 0.0 |