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| 1 | +"""Sprint 26 X1 — `dlm export --emit-sway-json` test coverage. |
| 2 | + |
| 3 | +Two scopes here, both unit-level: |
| 4 | + |
| 5 | +1. The helper module (``dlm.export.sway_json.write_sway_json``) |
| 6 | + round-trips a synthetic ``.dlm`` document into a ``sway.yaml`` on |
| 7 | + disk. Stubs the dlm-sway dependency via ``sys.modules`` injection |
| 8 | + so the test runs without the real ``[sway]`` extra installed. |
| 9 | + |
| 10 | +2. The CLI flag (``--emit-sway-json``) is wired into ``dlm export`` |
| 11 | + with the right help text, and the typed |
| 12 | + :class:`SwayJsonExportError` surfaces a clear message when |
| 13 | + dlm-sway isn't installed. |
| 14 | + |
| 15 | +End-to-end against the real ``dlm-sway`` package (running ``sway run`` |
| 16 | +on the emitted yaml) lives in the sway repo as |
| 17 | +``tests/integration/test_dlm_sway_json_export.py`` once both PRs are |
| 18 | +mergeable — see the sprint file's coordination notes. |
| 19 | +""" |
| 20 | + |
| 21 | +from __future__ import annotations |
| 22 | + |
| 23 | +import sys |
| 24 | +import types |
| 25 | +from pathlib import Path |
| 26 | + |
| 27 | +import pytest |
| 28 | + |
| 29 | +from dlm.export.sway_json import SwayJsonExportError, write_sway_json |
| 30 | + |
| 31 | + |
| 32 | +def _install_fake_dlm_sway(monkeypatch: pytest.MonkeyPatch) -> None: |
| 33 | + """Inject minimal `dlm_sway.integrations.dlm.{autogen,resolver}` |
| 34 | + modules so write_sway_json runs without the real extra installed. |
| 35 | + |
| 36 | + The fakes return shapes the real autogen produces so the helper |
| 37 | + can write a syntactically-valid YAML. |
| 38 | + """ |
| 39 | + dlm_sway = types.ModuleType("dlm_sway") |
| 40 | + integrations = types.ModuleType("dlm_sway.integrations") |
| 41 | + integrations_dlm = types.ModuleType("dlm_sway.integrations.dlm") |
| 42 | + autogen = types.ModuleType("dlm_sway.integrations.dlm.autogen") |
| 43 | + resolver = types.ModuleType("dlm_sway.integrations.dlm.resolver") |
| 44 | + |
| 45 | + class _FakeHandle: |
| 46 | + dlm_id = "01TEST" |
| 47 | + |
| 48 | + def _resolve_dlm(_path: Path) -> _FakeHandle: |
| 49 | + return _FakeHandle() |
| 50 | + |
| 51 | + def _build_spec_dict(_handle: _FakeHandle, *, dlm_source: str) -> dict[str, object]: |
| 52 | + return { |
| 53 | + "version": 1, |
| 54 | + "models": { |
| 55 | + "base": {"kind": "hf", "base": "smollm2-135m"}, |
| 56 | + "ft": {"kind": "hf", "base": "smollm2-135m"}, |
| 57 | + }, |
| 58 | + "defaults": {"seed": 0}, |
| 59 | + "suite": [ |
| 60 | + {"name": "dk", "kind": "delta_kl", "prompts": ["x"]}, |
| 61 | + ], |
| 62 | + "dlm_source": dlm_source, |
| 63 | + } |
| 64 | + |
| 65 | + resolver.resolve_dlm = _resolve_dlm # type: ignore[attr-defined] |
| 66 | + autogen.build_spec_dict = _build_spec_dict # type: ignore[attr-defined] |
| 67 | + |
| 68 | + monkeypatch.setitem(sys.modules, "dlm_sway", dlm_sway) |
| 69 | + monkeypatch.setitem(sys.modules, "dlm_sway.integrations", integrations) |
| 70 | + monkeypatch.setitem(sys.modules, "dlm_sway.integrations.dlm", integrations_dlm) |
| 71 | + monkeypatch.setitem(sys.modules, "dlm_sway.integrations.dlm.autogen", autogen) |
| 72 | + monkeypatch.setitem(sys.modules, "dlm_sway.integrations.dlm.resolver", resolver) |
| 73 | + |
| 74 | + |
| 75 | +class TestWriteSwayJson: |
| 76 | + def test_writes_yaml_in_export_dir( |
| 77 | + self, tmp_path: Path, monkeypatch: pytest.MonkeyPatch |
| 78 | + ) -> None: |
| 79 | + """Helper writes ``<export_dir>/sway.yaml`` and returns the path.""" |
| 80 | + _install_fake_dlm_sway(monkeypatch) |
| 81 | + dlm_path = tmp_path / "doc.dlm" |
| 82 | + dlm_path.write_text("---\ndlm_id: 01TEST\n---\nbody\n", encoding="utf-8") |
| 83 | + export_dir = tmp_path / "export" |
| 84 | + export_dir.mkdir() |
| 85 | + |
| 86 | + out = write_sway_json(dlm_path, export_dir) |
| 87 | + |
| 88 | + assert out == export_dir / "sway.yaml" |
| 89 | + assert out.exists() |
| 90 | + # Structural check on the emitted YAML — the test's fake |
| 91 | + # ``build_spec_dict`` returned a delta_kl probe. |
| 92 | + content = out.read_text(encoding="utf-8") |
| 93 | + assert "version: 1" in content |
| 94 | + assert "delta_kl" in content |
| 95 | + assert "dlm_source:" in content |
| 96 | + |
| 97 | + def test_creates_export_dir_if_missing( |
| 98 | + self, tmp_path: Path, monkeypatch: pytest.MonkeyPatch |
| 99 | + ) -> None: |
| 100 | + """Caller may pass a non-existent export_dir — helper mkdirs.""" |
| 101 | + _install_fake_dlm_sway(monkeypatch) |
| 102 | + dlm_path = tmp_path / "doc.dlm" |
| 103 | + dlm_path.write_text("---\ndlm_id: 01\n---\n", encoding="utf-8") |
| 104 | + export_dir = tmp_path / "fresh" / "nested" / "export" |
| 105 | + # NOT mkdir'd — helper should create. |
| 106 | + |
| 107 | + out = write_sway_json(dlm_path, export_dir) |
| 108 | + assert out.exists() |
| 109 | + assert export_dir.is_dir() |
| 110 | + |
| 111 | + def test_dlm_sway_missing_raises_typed_error( |
| 112 | + self, tmp_path: Path, monkeypatch: pytest.MonkeyPatch |
| 113 | + ) -> None: |
| 114 | + """ImportError on dlm_sway → SwayJsonExportError with install hint.""" |
| 115 | + # Wipe any cached dlm_sway modules so the import lookup re-fires. |
| 116 | + for mod in list(sys.modules): |
| 117 | + if mod == "dlm_sway" or mod.startswith("dlm_sway."): |
| 118 | + monkeypatch.delitem(sys.modules, mod, raising=False) |
| 119 | + |
| 120 | + # Block the import so the lazy import inside write_sway_json fails. |
| 121 | + import builtins |
| 122 | + |
| 123 | + real_import = builtins.__import__ |
| 124 | + |
| 125 | + def fake_import(name: str, *args: object, **kwargs: object) -> object: |
| 126 | + if name.startswith("dlm_sway"): |
| 127 | + raise ImportError("dlm-sway not installed (test stub)") |
| 128 | + return real_import(name, *args, **kwargs) |
| 129 | + |
| 130 | + monkeypatch.setattr(builtins, "__import__", fake_import) |
| 131 | + |
| 132 | + dlm_path = tmp_path / "doc.dlm" |
| 133 | + dlm_path.write_text("---\ndlm_id: 01\n---\n", encoding="utf-8") |
| 134 | + |
| 135 | + with pytest.raises(SwayJsonExportError, match="pip install 'dlm\\[sway\\]'"): |
| 136 | + write_sway_json(dlm_path, tmp_path / "export") |
| 137 | + |
| 138 | + def test_autogen_failure_wrapped_in_typed_error( |
| 139 | + self, tmp_path: Path, monkeypatch: pytest.MonkeyPatch |
| 140 | + ) -> None: |
| 141 | + """A sway-side parse error during build_spec_dict wraps to |
| 142 | + SwayJsonExportError so the dlm CLI sees a familiar exception |
| 143 | + family.""" |
| 144 | + # Install a dlm_sway whose build_spec_dict explodes. |
| 145 | + _install_fake_dlm_sway(monkeypatch) |
| 146 | + from dlm_sway.integrations.dlm import ( |
| 147 | + autogen as fake_autogen, # type: ignore[import-not-found] |
| 148 | + ) |
| 149 | + |
| 150 | + def _raise(*_a: object, **_kw: object) -> dict[str, object]: |
| 151 | + raise RuntimeError("intentional autogen blowup for test") |
| 152 | + |
| 153 | + monkeypatch.setattr(fake_autogen, "build_spec_dict", _raise) |
| 154 | + |
| 155 | + dlm_path = tmp_path / "doc.dlm" |
| 156 | + dlm_path.write_text("---\ndlm_id: 01\n---\n", encoding="utf-8") |
| 157 | + with pytest.raises(SwayJsonExportError, match="intentional autogen blowup"): |
| 158 | + write_sway_json(dlm_path, tmp_path / "export") |
| 159 | + |
| 160 | + |
| 161 | +class TestExportCliFlagWiring: |
| 162 | + """The ``--emit-sway-json`` flag is registered on the CLI with the |
| 163 | + sprint-specified help text. Smoke-level — flag presence + help.""" |
| 164 | + |
| 165 | + def test_flag_present_in_export_help(self) -> None: |
| 166 | + from typer.testing import CliRunner |
| 167 | + |
| 168 | + from dlm.cli.app import app |
| 169 | + |
| 170 | + runner = CliRunner() |
| 171 | + result = runner.invoke(app, ["export", "--help"]) |
| 172 | + assert result.exit_code == 0, result.output |
| 173 | + assert "--emit-sway-json" in result.output |
| 174 | + assert "sway.yaml" in result.output |