feat: check in workflow contract manifest

tests/wf_contract_manifest/test_cli.py

@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from wf_contract_manifest import (
+    ContractManifest,
+    ManifestDriftError,
+    manifest_from_openrpc,
+)
+from wf_contract_manifest.__main__ import main
+
+from .fixtures import synthetic_openrpc_document
+
+
+def _manifest() -> ContractManifest:
+    return manifest_from_openrpc(synthetic_openrpc_document())
+
+
+def test_write_generates_once_and_writes_requested_contract(monkeypatch, tmp_path: Path) -> None:
+    manifest = _manifest()
+    calls: list[tuple[object, Path]] = []
+    monkeypatch.setattr("wf_contract_manifest.__main__.generate_manifest", lambda: manifest)
+    monkeypatch.setattr(
+        "wf_contract_manifest.__main__.write_manifest",
+        lambda value, path: calls.append((value, path)) or path,
+    )
+    monkeypatch.setattr("wf_contract_manifest.__main__.DEFAULT_MANIFEST_PATH", tmp_path / "manifest.json")
+
+    assert main(["write"]) == 0
+    assert calls == [(manifest, tmp_path / "manifest.json")]
+
+
+def test_check_returns_nonzero_and_prints_drift_guidance(monkeypatch, capsys) -> None:
+    monkeypatch.setattr("wf_contract_manifest.__main__.generate_manifest", _manifest)
+
+    def fail_check(_manifest, _path) -> None:
+        raise ManifestDriftError("stale; run `python -m wf_contract_manifest write`")
+
+    monkeypatch.setattr("wf_contract_manifest.__main__.check_manifest", fail_check)
+
+    assert main(["check"]) == 1
+    assert "python -m wf_contract_manifest write" in capsys.readouterr().err
+
+
+def test_rejects_unknown_command() -> None:
+    with pytest.raises(SystemExit) as exc_info:
+        main(["unknown"])
+
+    assert exc_info.value.code == 2