test_cmd_describe.py
python
| 1 | """Tests for ``muse describe`` and ``muse/core/describe.py``. |
| 2 | |
| 3 | Covers: no tags fallback to SHA, tag at tip, tag behind tip (distance), |
| 4 | --long format, --require-tag exit-1, --format json, core describe_commit, |
| 5 | stress: deep ancestry. |
| 6 | """ |
| 7 | |
| 8 | from __future__ import annotations |
| 9 | |
| 10 | import datetime |
| 11 | import hashlib |
| 12 | import json |
| 13 | import pathlib |
| 14 | |
| 15 | import pytest |
| 16 | from tests.cli_test_helper import CliRunner |
| 17 | |
| 18 | cli = None # argparse migration — CliRunner ignores this arg |
| 19 | from muse.core.describe import describe_commit |
| 20 | from muse.core.object_store import write_object |
| 21 | from muse.core.snapshot import compute_snapshot_id |
| 22 | from muse.core.store import CommitRecord, SnapshotRecord, TagRecord, write_commit, write_snapshot, write_tag |
| 23 | |
| 24 | runner = CliRunner() |
| 25 | |
| 26 | _REPO_ID = "describe-test" |
| 27 | |
| 28 | |
| 29 | # --------------------------------------------------------------------------- |
| 30 | # Helpers |
| 31 | # --------------------------------------------------------------------------- |
| 32 | |
| 33 | |
| 34 | def _sha(data: bytes) -> str: |
| 35 | return hashlib.sha256(data).hexdigest() |
| 36 | |
| 37 | |
| 38 | def _init_repo(path: pathlib.Path) -> pathlib.Path: |
| 39 | muse = path / ".muse" |
| 40 | for d in ("commits", "snapshots", "objects", "refs/heads", f"tags/{_REPO_ID}"): |
| 41 | (muse / d).mkdir(parents=True, exist_ok=True) |
| 42 | (muse / "HEAD").write_text("ref: refs/heads/main", encoding="utf-8") |
| 43 | (muse / "repo.json").write_text( |
| 44 | json.dumps({"repo_id": _REPO_ID, "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 _make_commit( |
| 54 | root: pathlib.Path, |
| 55 | parent_id: str | None = None, |
| 56 | content: bytes = b"data", |
| 57 | branch: str = "main", |
| 58 | ) -> str: |
| 59 | obj_id = _sha(content) |
| 60 | write_object(root, obj_id, content) |
| 61 | manifest = {f"file_{obj_id[:8]}.txt": obj_id} |
| 62 | snap_id = compute_snapshot_id(manifest) |
| 63 | write_snapshot(root, SnapshotRecord(snapshot_id=snap_id, manifest=manifest)) |
| 64 | committed_at = datetime.datetime.now(datetime.timezone.utc) |
| 65 | suffix = parent_id or "root" |
| 66 | commit_id = _sha(f"{suffix}:{snap_id}:{committed_at.isoformat()}".encode()) |
| 67 | write_commit(root, CommitRecord( |
| 68 | commit_id=commit_id, |
| 69 | repo_id=_REPO_ID, |
| 70 | branch=branch, |
| 71 | snapshot_id=snap_id, |
| 72 | message=f"commit on {branch}", |
| 73 | committed_at=committed_at, |
| 74 | parent_commit_id=parent_id, |
| 75 | )) |
| 76 | (root / ".muse" / "refs" / "heads" / branch).write_text(commit_id, encoding="utf-8") |
| 77 | return commit_id |
| 78 | |
| 79 | |
| 80 | def _make_tag(root: pathlib.Path, tag: str, commit_id: str) -> None: |
| 81 | import uuid as _uuid |
| 82 | write_tag(root, TagRecord( |
| 83 | tag_id=str(_uuid.uuid4()), |
| 84 | tag=tag, |
| 85 | commit_id=commit_id, |
| 86 | repo_id=_REPO_ID, |
| 87 | created_at=datetime.datetime.now(datetime.timezone.utc), |
| 88 | )) |
| 89 | |
| 90 | |
| 91 | # --------------------------------------------------------------------------- |
| 92 | # Unit: core describe_commit |
| 93 | # --------------------------------------------------------------------------- |
| 94 | |
| 95 | |
| 96 | def test_describe_no_tags_returns_short_sha(tmp_path: pathlib.Path) -> None: |
| 97 | _init_repo(tmp_path) |
| 98 | cid = _make_commit(tmp_path, content=b"alpha") |
| 99 | result = describe_commit(tmp_path, _REPO_ID, cid) |
| 100 | assert result["tag"] is None |
| 101 | assert result["name"] == cid[:12] |
| 102 | assert result["short_sha"] == cid[:12] |
| 103 | |
| 104 | |
| 105 | def test_describe_tag_at_tip(tmp_path: pathlib.Path) -> None: |
| 106 | _init_repo(tmp_path) |
| 107 | cid = _make_commit(tmp_path, content=b"beta") |
| 108 | _make_tag(tmp_path, "v1.0.0", cid) |
| 109 | result = describe_commit(tmp_path, _REPO_ID, cid) |
| 110 | assert result["tag"] == "v1.0.0" |
| 111 | assert result["distance"] == 0 |
| 112 | assert result["name"] == "v1.0.0" |
| 113 | |
| 114 | |
| 115 | def test_describe_tag_one_hop_behind(tmp_path: pathlib.Path) -> None: |
| 116 | _init_repo(tmp_path) |
| 117 | cid1 = _make_commit(tmp_path, content=b"first") |
| 118 | _make_tag(tmp_path, "v0.9.0", cid1) |
| 119 | cid2 = _make_commit(tmp_path, parent_id=cid1, content=b"second") |
| 120 | result = describe_commit(tmp_path, _REPO_ID, cid2) |
| 121 | assert result["tag"] == "v0.9.0" |
| 122 | assert result["distance"] == 1 |
| 123 | assert result["name"] == "v0.9.0~1" |
| 124 | |
| 125 | |
| 126 | def test_describe_long_format(tmp_path: pathlib.Path) -> None: |
| 127 | _init_repo(tmp_path) |
| 128 | cid = _make_commit(tmp_path, content=b"gamma") |
| 129 | _make_tag(tmp_path, "v2.0.0", cid) |
| 130 | result = describe_commit(tmp_path, _REPO_ID, cid, long_format=True) |
| 131 | assert result["tag"] == "v2.0.0" |
| 132 | assert result["distance"] == 0 |
| 133 | # Long format always includes distance + SHA. |
| 134 | assert "v2.0.0-0-g" in result["name"] |
| 135 | |
| 136 | |
| 137 | # --------------------------------------------------------------------------- |
| 138 | # CLI: muse describe |
| 139 | # --------------------------------------------------------------------------- |
| 140 | |
| 141 | |
| 142 | def test_describe_cli_help() -> None: |
| 143 | result = runner.invoke(cli, ["describe", "--help"]) |
| 144 | assert result.exit_code == 0 |
| 145 | assert "--long" in result.output or "-l" in result.output |
| 146 | |
| 147 | |
| 148 | def test_describe_cli_no_commits(tmp_path: pathlib.Path) -> None: |
| 149 | _init_repo(tmp_path) |
| 150 | result = runner.invoke(cli, ["describe"], env=_env(tmp_path)) |
| 151 | assert result.exit_code != 0 |
| 152 | |
| 153 | |
| 154 | def test_describe_cli_text_output(tmp_path: pathlib.Path) -> None: |
| 155 | _init_repo(tmp_path) |
| 156 | cid = _make_commit(tmp_path, content=b"cli-test") |
| 157 | _make_tag(tmp_path, "v3.0.0", cid) |
| 158 | result = runner.invoke(cli, ["describe"], env=_env(tmp_path)) |
| 159 | assert result.exit_code == 0 |
| 160 | assert "v3.0.0" in result.output |
| 161 | |
| 162 | |
| 163 | def test_describe_cli_json_output(tmp_path: pathlib.Path) -> None: |
| 164 | _init_repo(tmp_path) |
| 165 | cid = _make_commit(tmp_path, content=b"json-test") |
| 166 | _make_tag(tmp_path, "v4.0.0", cid) |
| 167 | result = runner.invoke(cli, ["describe", "--format", "json"], env=_env(tmp_path)) |
| 168 | assert result.exit_code == 0 |
| 169 | data = json.loads(result.output) |
| 170 | assert data["tag"] == "v4.0.0" |
| 171 | assert data["distance"] == 0 |
| 172 | assert "commit_id" in data |
| 173 | |
| 174 | |
| 175 | def test_describe_cli_require_tag_fails_without_tags(tmp_path: pathlib.Path) -> None: |
| 176 | _init_repo(tmp_path) |
| 177 | _make_commit(tmp_path, content=b"no-tags") |
| 178 | result = runner.invoke(cli, ["describe", "--require-tag"], env=_env(tmp_path)) |
| 179 | assert result.exit_code != 0 |
| 180 | |
| 181 | |
| 182 | def test_describe_cli_long_flag(tmp_path: pathlib.Path) -> None: |
| 183 | _init_repo(tmp_path) |
| 184 | cid = _make_commit(tmp_path, content=b"long") |
| 185 | _make_tag(tmp_path, "v5.0.0", cid) |
| 186 | result = runner.invoke(cli, ["describe", "--long"], env=_env(tmp_path)) |
| 187 | assert result.exit_code == 0 |
| 188 | assert "v5.0.0-0-g" in result.output |
| 189 | |
| 190 | |
| 191 | def test_describe_cli_short_flags(tmp_path: pathlib.Path) -> None: |
| 192 | _init_repo(tmp_path) |
| 193 | cid = _make_commit(tmp_path, content=b"short-flags") |
| 194 | _make_tag(tmp_path, "v6.0.0", cid) |
| 195 | result = runner.invoke(cli, ["describe", "-l", "-f", "json"], env=_env(tmp_path)) |
| 196 | assert result.exit_code == 0 |
| 197 | data = json.loads(result.output) |
| 198 | assert "v6.0.0" in data["name"] |
| 199 | |
| 200 | |
| 201 | # --------------------------------------------------------------------------- |
| 202 | # Stress: deep ancestry (100 commits, tag at root) |
| 203 | # --------------------------------------------------------------------------- |
| 204 | |
| 205 | |
| 206 | def test_describe_stress_deep_ancestry(tmp_path: pathlib.Path) -> None: |
| 207 | _init_repo(tmp_path) |
| 208 | prev: str | None = None |
| 209 | first_commit_id = "" |
| 210 | for i in range(100): |
| 211 | cid = _make_commit(tmp_path, parent_id=prev, content=f"step {i}".encode()) |
| 212 | if i == 0: |
| 213 | first_commit_id = cid |
| 214 | prev = cid |
| 215 | |
| 216 | _make_tag(tmp_path, "v-root", first_commit_id) |
| 217 | assert prev is not None |
| 218 | result = describe_commit(tmp_path, _REPO_ID, prev) |
| 219 | assert result["tag"] == "v-root" |
| 220 | assert result["distance"] == 99 |
| 221 | assert "v-root~99" == result["name"] |