test_cmd_diff.py
python
| 1 | """Comprehensive tests for ``muse diff``. |
| 2 | |
| 3 | Covers: |
| 4 | - E2E: CLI flags (--commit / -c, --format json/text, --plugin) |
| 5 | - Integration: diff HEAD vs working tree |
| 6 | - Stress: diff with many files |
| 7 | """ |
| 8 | |
| 9 | from __future__ import annotations |
| 10 | |
| 11 | import datetime |
| 12 | import json |
| 13 | import pathlib |
| 14 | import uuid |
| 15 | |
| 16 | import pytest |
| 17 | from tests.cli_test_helper import CliRunner |
| 18 | |
| 19 | cli = None # argparse migration — CliRunner ignores this arg |
| 20 | |
| 21 | runner = CliRunner() |
| 22 | |
| 23 | |
| 24 | # --------------------------------------------------------------------------- |
| 25 | # Shared helpers |
| 26 | # --------------------------------------------------------------------------- |
| 27 | |
| 28 | def _env(root: pathlib.Path) -> dict[str, str]: |
| 29 | return {"MUSE_REPO_ROOT": str(root)} |
| 30 | |
| 31 | |
| 32 | def _init_repo(tmp_path: pathlib.Path) -> tuple[pathlib.Path, str]: |
| 33 | muse_dir = tmp_path / ".muse" |
| 34 | muse_dir.mkdir() |
| 35 | repo_id = str(uuid.uuid4()) |
| 36 | (muse_dir / "repo.json").write_text(json.dumps({ |
| 37 | "repo_id": repo_id, |
| 38 | "domain": "midi", |
| 39 | "default_branch": "main", |
| 40 | "created_at": "2025-01-01T00:00:00+00:00", |
| 41 | }), encoding="utf-8") |
| 42 | (muse_dir / "HEAD").write_text("ref: refs/heads/main", encoding="utf-8") |
| 43 | (muse_dir / "refs" / "heads").mkdir(parents=True) |
| 44 | (muse_dir / "snapshots").mkdir() |
| 45 | (muse_dir / "commits").mkdir() |
| 46 | (muse_dir / "objects").mkdir() |
| 47 | return tmp_path, repo_id |
| 48 | |
| 49 | |
| 50 | def _make_commit(root: pathlib.Path, repo_id: str, message: str = "test", |
| 51 | manifest: dict[str, str] | None = None) -> str: |
| 52 | from muse.core.store import CommitRecord, SnapshotRecord, write_commit, write_snapshot |
| 53 | from muse.core.snapshot import compute_snapshot_id, compute_commit_id |
| 54 | |
| 55 | ref_file = root / ".muse" / "refs" / "heads" / "main" |
| 56 | parent_id = ref_file.read_text().strip() if ref_file.exists() else None |
| 57 | m = manifest or {} |
| 58 | snap_id = compute_snapshot_id(m) |
| 59 | committed_at = datetime.datetime.now(datetime.timezone.utc) |
| 60 | commit_id = compute_commit_id( |
| 61 | parent_ids=[parent_id] if parent_id else [], |
| 62 | snapshot_id=snap_id, message=message, |
| 63 | committed_at_iso=committed_at.isoformat(), |
| 64 | ) |
| 65 | write_snapshot(root, SnapshotRecord(snapshot_id=snap_id, manifest=m)) |
| 66 | write_commit(root, CommitRecord( |
| 67 | commit_id=commit_id, repo_id=repo_id, branch="main", |
| 68 | snapshot_id=snap_id, message=message, committed_at=committed_at, |
| 69 | parent_commit_id=parent_id, |
| 70 | )) |
| 71 | ref_file.parent.mkdir(parents=True, exist_ok=True) |
| 72 | ref_file.write_text(commit_id, encoding="utf-8") |
| 73 | return commit_id |
| 74 | |
| 75 | |
| 76 | # --------------------------------------------------------------------------- |
| 77 | # Tests |
| 78 | # --------------------------------------------------------------------------- |
| 79 | |
| 80 | class TestDiffCLI: |
| 81 | def test_diff_empty_repo(self, tmp_path: pathlib.Path) -> None: |
| 82 | root, _ = _init_repo(tmp_path) |
| 83 | result = runner.invoke(cli, ["diff"], env=_env(root), catch_exceptions=False) |
| 84 | assert result.exit_code == 0 |
| 85 | |
| 86 | def test_diff_after_commit_no_changes(self, tmp_path: pathlib.Path) -> None: |
| 87 | root, repo_id = _init_repo(tmp_path) |
| 88 | _make_commit(root, repo_id) |
| 89 | result = runner.invoke(cli, ["diff"], env=_env(root), catch_exceptions=False) |
| 90 | assert result.exit_code == 0 |
| 91 | |
| 92 | def test_diff_shows_added_files(self, tmp_path: pathlib.Path) -> None: |
| 93 | root, repo_id = _init_repo(tmp_path) |
| 94 | _make_commit(root, repo_id) |
| 95 | (root / "new_song.mid").write_bytes(b"MIDI data here") |
| 96 | result = runner.invoke(cli, ["diff"], env=_env(root), catch_exceptions=False) |
| 97 | assert result.exit_code == 0 |
| 98 | assert "new_song.mid" in result.output |
| 99 | |
| 100 | def test_diff_format_json(self, tmp_path: pathlib.Path) -> None: |
| 101 | root, repo_id = _init_repo(tmp_path) |
| 102 | _make_commit(root, repo_id) |
| 103 | result = runner.invoke(cli, ["diff", "--format", "json"], env=_env(root), catch_exceptions=False) |
| 104 | assert result.exit_code == 0 |
| 105 | data = json.loads(result.output) |
| 106 | assert isinstance(data, (dict, list)) |
| 107 | |
| 108 | def test_diff_between_two_commits(self, tmp_path: pathlib.Path) -> None: |
| 109 | root, repo_id = _init_repo(tmp_path) |
| 110 | commit1 = _make_commit(root, repo_id, message="first") |
| 111 | commit2 = _make_commit(root, repo_id, message="second") |
| 112 | result = runner.invoke( |
| 113 | cli, ["diff", commit1, commit2], |
| 114 | env=_env(root), catch_exceptions=False |
| 115 | ) |
| 116 | assert result.exit_code == 0 |
| 117 | |
| 118 | def test_diff_output_clean_no_exception(self, tmp_path: pathlib.Path) -> None: |
| 119 | root, repo_id = _init_repo(tmp_path) |
| 120 | _make_commit(root, repo_id) |
| 121 | result = runner.invoke(cli, ["diff"], env=_env(root)) |
| 122 | assert result.exception is None |
| 123 | |
| 124 | |
| 125 | class TestDiffStress: |
| 126 | def test_diff_with_many_changed_files(self, tmp_path: pathlib.Path) -> None: |
| 127 | root, repo_id = _init_repo(tmp_path) |
| 128 | _make_commit(root, repo_id) |
| 129 | for i in range(50): |
| 130 | (root / f"track_{i:03d}.mid").write_bytes(f"data {i}".encode()) |
| 131 | result = runner.invoke(cli, ["diff"], env=_env(root), catch_exceptions=False) |
| 132 | assert result.exit_code == 0 |