test_plumbing_commit_graph.py
python
| 1 | """Tests for ``muse plumbing commit-graph`` (base functionality). |
| 2 | |
| 3 | Covers: BFS traversal from HEAD, explicit ``--tip``, ``--stop-at`` pruning, |
| 4 | ``--max`` truncation, text format (one ID per line), empty-branch error, |
| 5 | unknown tip error, truncated flag, and a stress case with 200 commits. |
| 6 | |
| 7 | Enhancement flags (--count, --first-parent, --ancestry-path) are tested in |
| 8 | ``tests/test_plumbing_commit_graph_enhancements.py``. |
| 9 | """ |
| 10 | |
| 11 | from __future__ import annotations |
| 12 | |
| 13 | import datetime |
| 14 | import hashlib |
| 15 | import json |
| 16 | import pathlib |
| 17 | |
| 18 | from typer.testing import CliRunner |
| 19 | |
| 20 | from muse.cli.app import cli |
| 21 | from muse.core.errors import ExitCode |
| 22 | from muse.core.store import CommitRecord, SnapshotRecord, write_commit, write_snapshot |
| 23 | |
| 24 | runner = CliRunner() |
| 25 | |
| 26 | |
| 27 | # --------------------------------------------------------------------------- |
| 28 | # Helpers |
| 29 | # --------------------------------------------------------------------------- |
| 30 | |
| 31 | |
| 32 | def _sha(tag: str) -> str: |
| 33 | return hashlib.sha256(tag.encode()).hexdigest() |
| 34 | |
| 35 | |
| 36 | def _init_repo(path: pathlib.Path) -> pathlib.Path: |
| 37 | muse = path / ".muse" |
| 38 | (muse / "commits").mkdir(parents=True) |
| 39 | (muse / "snapshots").mkdir(parents=True) |
| 40 | (muse / "objects").mkdir(parents=True) |
| 41 | (muse / "refs" / "heads").mkdir(parents=True) |
| 42 | (muse / "HEAD").write_text("ref: refs/heads/main", encoding="utf-8") |
| 43 | (muse / "repo.json").write_text( |
| 44 | json.dumps({"repo_id": "test-repo", "domain": "midi"}), encoding="utf-8" |
| 45 | ) |
| 46 | return path |
| 47 | |
| 48 | |
| 49 | def _env(repo: pathlib.Path) -> dict[str, str]: |
| 50 | return {"MUSE_REPO_ROOT": str(repo)} |
| 51 | |
| 52 | |
| 53 | def _snap(repo: pathlib.Path) -> str: |
| 54 | sid = _sha("snap") |
| 55 | write_snapshot( |
| 56 | repo, |
| 57 | SnapshotRecord( |
| 58 | snapshot_id=sid, |
| 59 | manifest={}, |
| 60 | created_at=datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc), |
| 61 | ), |
| 62 | ) |
| 63 | return sid |
| 64 | |
| 65 | |
| 66 | def _commit( |
| 67 | repo: pathlib.Path, tag: str, sid: str, branch: str = "main", parent: str | None = None |
| 68 | ) -> str: |
| 69 | cid = _sha(tag) |
| 70 | write_commit( |
| 71 | repo, |
| 72 | CommitRecord( |
| 73 | commit_id=cid, |
| 74 | repo_id="test-repo", |
| 75 | branch=branch, |
| 76 | snapshot_id=sid, |
| 77 | message=tag, |
| 78 | committed_at=datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc), |
| 79 | author="tester", |
| 80 | parent_commit_id=parent, |
| 81 | ), |
| 82 | ) |
| 83 | ref = repo / ".muse" / "refs" / "heads" / branch |
| 84 | ref.parent.mkdir(parents=True, exist_ok=True) |
| 85 | ref.write_text(cid, encoding="utf-8") |
| 86 | return cid |
| 87 | |
| 88 | |
| 89 | def _linear_chain(repo: pathlib.Path, length: int) -> list[str]: |
| 90 | """Return list of commit IDs from root (index 0) to tip (index length-1).""" |
| 91 | sid = _snap(repo) |
| 92 | cids: list[str] = [] |
| 93 | parent: str | None = None |
| 94 | for i in range(length): |
| 95 | cid = _commit(repo, f"c{i}", sid, parent=parent) |
| 96 | cids.append(cid) |
| 97 | parent = cid |
| 98 | return cids |
| 99 | |
| 100 | |
| 101 | # --------------------------------------------------------------------------- |
| 102 | # Unit: empty branch and bad tip |
| 103 | # --------------------------------------------------------------------------- |
| 104 | |
| 105 | |
| 106 | class TestCommitGraphUnit: |
| 107 | def test_empty_branch_exits_user_error(self, tmp_path: pathlib.Path) -> None: |
| 108 | repo = _init_repo(tmp_path) |
| 109 | result = runner.invoke(cli, ["plumbing", "commit-graph"], env=_env(repo)) |
| 110 | assert result.exit_code == ExitCode.USER_ERROR |
| 111 | assert "error" in json.loads(result.stdout) |
| 112 | |
| 113 | def test_unknown_tip_exits_user_error(self, tmp_path: pathlib.Path) -> None: |
| 114 | repo = _init_repo(tmp_path) |
| 115 | ghost = _sha("ghost") |
| 116 | result = runner.invoke( |
| 117 | cli, ["plumbing", "commit-graph", "--tip", ghost], env=_env(repo) |
| 118 | ) |
| 119 | assert result.exit_code == ExitCode.USER_ERROR |
| 120 | |
| 121 | def test_bad_format_exits_user_error(self, tmp_path: pathlib.Path) -> None: |
| 122 | repo = _init_repo(tmp_path) |
| 123 | sid = _snap(repo) |
| 124 | cid = _commit(repo, "c", sid) |
| 125 | result = runner.invoke( |
| 126 | cli, ["plumbing", "commit-graph", "--tip", cid, "--format", "toml"], env=_env(repo) |
| 127 | ) |
| 128 | assert result.exit_code == ExitCode.USER_ERROR |
| 129 | |
| 130 | |
| 131 | # --------------------------------------------------------------------------- |
| 132 | # Integration: BFS traversal |
| 133 | # --------------------------------------------------------------------------- |
| 134 | |
| 135 | |
| 136 | class TestCommitGraphBFS: |
| 137 | def test_single_commit_graph(self, tmp_path: pathlib.Path) -> None: |
| 138 | repo = _init_repo(tmp_path) |
| 139 | sid = _snap(repo) |
| 140 | cid = _commit(repo, "solo", sid) |
| 141 | result = runner.invoke( |
| 142 | cli, ["plumbing", "commit-graph", "--tip", cid], env=_env(repo) |
| 143 | ) |
| 144 | assert result.exit_code == 0, result.output |
| 145 | data = json.loads(result.stdout) |
| 146 | assert data["count"] == 1 |
| 147 | assert data["commits"][0]["commit_id"] == cid |
| 148 | assert data["tip"] == cid |
| 149 | |
| 150 | def test_linear_chain_all_commits_traversed(self, tmp_path: pathlib.Path) -> None: |
| 151 | repo = _init_repo(tmp_path) |
| 152 | cids = _linear_chain(repo, 5) |
| 153 | tip = cids[-1] |
| 154 | result = runner.invoke( |
| 155 | cli, ["plumbing", "commit-graph", "--tip", tip], env=_env(repo) |
| 156 | ) |
| 157 | assert result.exit_code == 0 |
| 158 | data = json.loads(result.stdout) |
| 159 | assert data["count"] == 5 |
| 160 | found = {c["commit_id"] for c in data["commits"]} |
| 161 | assert found == set(cids) |
| 162 | |
| 163 | def test_head_default_traverses_from_current_branch(self, tmp_path: pathlib.Path) -> None: |
| 164 | repo = _init_repo(tmp_path) |
| 165 | cids = _linear_chain(repo, 3) |
| 166 | result = runner.invoke(cli, ["plumbing", "commit-graph"], env=_env(repo)) |
| 167 | assert result.exit_code == 0 |
| 168 | data = json.loads(result.stdout) |
| 169 | assert data["count"] == 3 |
| 170 | |
| 171 | def test_commit_node_has_required_fields(self, tmp_path: pathlib.Path) -> None: |
| 172 | repo = _init_repo(tmp_path) |
| 173 | sid = _snap(repo) |
| 174 | cid = _commit(repo, "fields-test", sid) |
| 175 | result = runner.invoke( |
| 176 | cli, ["plumbing", "commit-graph", "--tip", cid], env=_env(repo) |
| 177 | ) |
| 178 | assert result.exit_code == 0 |
| 179 | node = json.loads(result.stdout)["commits"][0] |
| 180 | for field in ( |
| 181 | "commit_id", "parent_commit_id", "parent2_commit_id", |
| 182 | "message", "branch", "committed_at", "snapshot_id", "author", |
| 183 | ): |
| 184 | assert field in node, f"Missing field: {field}" |
| 185 | |
| 186 | |
| 187 | # --------------------------------------------------------------------------- |
| 188 | # Integration: --stop-at pruning |
| 189 | # --------------------------------------------------------------------------- |
| 190 | |
| 191 | |
| 192 | class TestCommitGraphStopAt: |
| 193 | def test_stop_at_excludes_ancestor_commits(self, tmp_path: pathlib.Path) -> None: |
| 194 | repo = _init_repo(tmp_path) |
| 195 | cids = _linear_chain(repo, 5) |
| 196 | # cids = [c0, c1, c2, c3, c4]; stop at c2 — should see c4, c3 only. |
| 197 | result = runner.invoke( |
| 198 | cli, |
| 199 | ["plumbing", "commit-graph", "--tip", cids[4], "--stop-at", cids[2]], |
| 200 | env=_env(repo), |
| 201 | ) |
| 202 | assert result.exit_code == 0 |
| 203 | data = json.loads(result.stdout) |
| 204 | found = {c["commit_id"] for c in data["commits"]} |
| 205 | assert cids[4] in found |
| 206 | assert cids[3] in found |
| 207 | assert cids[2] not in found |
| 208 | assert cids[1] not in found |
| 209 | |
| 210 | def test_stop_at_tip_yields_no_commits(self, tmp_path: pathlib.Path) -> None: |
| 211 | repo = _init_repo(tmp_path) |
| 212 | cids = _linear_chain(repo, 3) |
| 213 | result = runner.invoke( |
| 214 | cli, |
| 215 | ["plumbing", "commit-graph", "--tip", cids[2], "--stop-at", cids[2]], |
| 216 | env=_env(repo), |
| 217 | ) |
| 218 | assert result.exit_code == 0 |
| 219 | data = json.loads(result.stdout) |
| 220 | assert data["count"] == 0 |
| 221 | |
| 222 | |
| 223 | # --------------------------------------------------------------------------- |
| 224 | # Integration: --max truncation |
| 225 | # --------------------------------------------------------------------------- |
| 226 | |
| 227 | |
| 228 | class TestCommitGraphMax: |
| 229 | def test_max_limits_traversal(self, tmp_path: pathlib.Path) -> None: |
| 230 | repo = _init_repo(tmp_path) |
| 231 | _linear_chain(repo, 10) |
| 232 | result = runner.invoke( |
| 233 | cli, ["plumbing", "commit-graph", "--max", "3"], env=_env(repo) |
| 234 | ) |
| 235 | assert result.exit_code == 0 |
| 236 | data = json.loads(result.stdout) |
| 237 | assert data["count"] == 3 |
| 238 | assert data["truncated"] is True |
| 239 | |
| 240 | def test_truncated_false_when_all_fit(self, tmp_path: pathlib.Path) -> None: |
| 241 | repo = _init_repo(tmp_path) |
| 242 | _linear_chain(repo, 5) |
| 243 | result = runner.invoke( |
| 244 | cli, ["plumbing", "commit-graph", "--max", "100"], env=_env(repo) |
| 245 | ) |
| 246 | assert result.exit_code == 0 |
| 247 | assert json.loads(result.stdout)["truncated"] is False |
| 248 | |
| 249 | |
| 250 | # --------------------------------------------------------------------------- |
| 251 | # Integration: text format |
| 252 | # --------------------------------------------------------------------------- |
| 253 | |
| 254 | |
| 255 | class TestCommitGraphTextFormat: |
| 256 | def test_text_format_emits_one_id_per_line(self, tmp_path: pathlib.Path) -> None: |
| 257 | repo = _init_repo(tmp_path) |
| 258 | cids = _linear_chain(repo, 4) |
| 259 | result = runner.invoke( |
| 260 | cli, ["plumbing", "commit-graph", "--format", "text"], env=_env(repo) |
| 261 | ) |
| 262 | assert result.exit_code == 0 |
| 263 | lines = [ln for ln in result.stdout.splitlines() if ln.strip()] |
| 264 | assert len(lines) == 4 |
| 265 | assert all(len(ln) == 64 for ln in lines) |
| 266 | |
| 267 | def test_short_format_flag(self, tmp_path: pathlib.Path) -> None: |
| 268 | repo = _init_repo(tmp_path) |
| 269 | _linear_chain(repo, 2) |
| 270 | result = runner.invoke( |
| 271 | cli, ["plumbing", "commit-graph", "-f", "text"], env=_env(repo) |
| 272 | ) |
| 273 | assert result.exit_code == 0 |
| 274 | |
| 275 | |
| 276 | # --------------------------------------------------------------------------- |
| 277 | # Stress: 200-commit linear history |
| 278 | # --------------------------------------------------------------------------- |
| 279 | |
| 280 | |
| 281 | class TestCommitGraphStress: |
| 282 | def test_200_commit_chain_fully_traversed(self, tmp_path: pathlib.Path) -> None: |
| 283 | repo = _init_repo(tmp_path) |
| 284 | cids = _linear_chain(repo, 200) |
| 285 | result = runner.invoke(cli, ["plumbing", "commit-graph"], env=_env(repo)) |
| 286 | assert result.exit_code == 0 |
| 287 | data = json.loads(result.stdout) |
| 288 | assert data["count"] == 200 |
| 289 | assert data["truncated"] is False |
| 290 | |
| 291 | def test_200_commit_chain_stop_at_midpoint(self, tmp_path: pathlib.Path) -> None: |
| 292 | repo = _init_repo(tmp_path) |
| 293 | cids = _linear_chain(repo, 200) |
| 294 | result = runner.invoke( |
| 295 | cli, |
| 296 | ["plumbing", "commit-graph", "--tip", cids[199], "--stop-at", cids[99]], |
| 297 | env=_env(repo), |
| 298 | ) |
| 299 | assert result.exit_code == 0 |
| 300 | data = json.loads(result.stdout) |
| 301 | # commits 100..199 (100 commits total) |
| 302 | assert data["count"] == 100 |