python: derive release version from repository

python/sdk/tests/test_release_version.py

@@ -0,0 +1,39 @@
+"""Tests for repository-owned Python release versions."""
+
+from __future__ import annotations
+
+import json
+import runpy
+from pathlib import Path
+from types import SimpleNamespace
+
+import pytest
+
+
+ROOT = Path(__file__).resolve().parents[3]
+SCRIPT = ROOT / "scripts" / "build-python-release.py"
+build_python_release = SimpleNamespace(**runpy.run_path(str(SCRIPT)))
+
+
+def test_repository_version_matches_root_package_json() -> None:
+    expected = json.loads((ROOT / "package.json").read_text())["version"]
+
+    assert build_python_release.repository_version() == expected
+
+
+def test_release_tag_is_optional_for_non_release_builds() -> None:
+    build_python_release.validate_release_tag(None, "1.2.3")
+
+
+def test_release_tag_must_match_repository_version() -> None:
+    build_python_release.validate_release_tag("python-v1.2.3", "1.2.3")
+
+    with pytest.raises(ValueError, match="expected 'python-v1.2.3'"):
+        build_python_release.validate_release_tag("python-v1.2.4", "1.2.3")
+
+
+def test_repository_version_rejects_non_stable_versions(tmp_path: Path) -> None:
+    (tmp_path / "package.json").write_text('{"version":"1.2.3-dev"}\n')
+
+    with pytest.raises(ValueError, match="must be stable X.Y.Z"):
+        build_python_release.repository_version(tmp_path)