feat(release): publish changelog-driven notes

tests/test_changelog.py

@@ -0,0 +1,202 @@
+"""Release-note changelog extraction tests (DC-6, DC-7)."""
+import importlib.util
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+EXTRACTOR_PATH = REPO_ROOT / "scripts" / "extract_changelog.py"
+RELEASE_REQUEST_PATH = REPO_ROOT / "scripts" / "release_request.py"
+CHANGELOG_PATH = REPO_ROOT / "CHANGELOG.md"
+
+
+def _extractor_module():
+    spec = importlib.util.spec_from_file_location("extract_changelog", EXTRACTOR_PATH)
+    assert spec and spec.loader
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_extracts_the_requested_version_section_verbatim():
+    extractor = _extractor_module()
+    changelog = """# Changelog
+
+## [Unreleased]
+
+## [1.4.0] - 2026-09-10
+
+### Added
+
+- Show a release summary to consumers.
+
+## [1.3.0] - 2026-09-01
+
+### Fixed
+
+- Preserve the observation history during upgrades.
+"""
+    expected = """## [1.4.0] - 2026-09-10
+
+### Added
+
+- Show a release summary to consumers.
+
+"""
+
+    assert extractor.extract_version_section(changelog, "1.4.0") == expected
+
+
+def test_checked_in_changelog_keeps_unreleased_first_and_categories_limited():
+    lines = CHANGELOG_PATH.read_text(encoding="utf-8").splitlines()
+    unreleased = lines.index("## [Unreleased]")
+    version_headings = [
+        index for index, line in enumerate(lines)
+        if line.startswith("## [") and line != "## [Unreleased]"
+    ]
+    first_version = version_headings[0] if version_headings else len(lines)
+    categories = [
+        line.removeprefix("### ")
+        for line in lines[unreleased + 1:first_version]
+        if line.startswith("### ")
+    ]
+
+    assert unreleased < first_version
+    assert set(categories) <= {"Added", "Changed", "Fixed"}
+
+
+@pytest.mark.parametrize(
+    ("changelog", "expected_error"),
+    [
+        ("# Changelog\n\n## [Unreleased]\n", "missing"),
+        (
+            "# Changelog\n\n## [Unreleased]\n\n## [1.4.0] - 2026-09-10\n",
+            "empty",
+        ),
+        (
+            "# Changelog\n\n## [Unreleased]\n\n## [1.4.0] - 2026-02-30\n\n- Add a note.\n",
+            "malformed release date",
+        ),
+    ],
+)
+def test_fails_closed_for_missing_empty_or_malformed_sections(
+    changelog, expected_error
+):
+    extractor = _extractor_module()
+
+    with pytest.raises(extractor.ChangelogError, match=expected_error):
+        extractor.extract_version_section(changelog, "1.4.0")
+
+
+def test_command_emits_a_workflow_error_and_nonzero_status(tmp_path):
+    changelog = tmp_path / "CHANGELOG.md"
+    changelog.write_text("# Changelog\n\n## [Unreleased]\n", encoding="utf-8")
+
+    result = subprocess.run(
+        [sys.executable, str(EXTRACTOR_PATH), str(changelog), "1.4.0"],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+    assert result.returncode != 0
+    assert result.stderr.startswith("::error::")
+    assert "missing" in result.stderr
+
+
+def test_assembles_a_release_body_without_changing_the_section():
+    extractor = _extractor_module()
+    section = "## [1.4.0] - 2026-09-10\n\n### Added\n\n- Show a release summary.\n"
+    footer = "## Install\n\nUse the package channel.\n"
+
+    assert extractor.assemble_release_body(section, footer) == (
+        section + "\n" + footer
+    )
+
+
+def test_command_can_write_the_complete_release_body(tmp_path):
+    changelog = tmp_path / "CHANGELOG.md"
+    changelog.write_text(
+        "# Changelog\n\n## [Unreleased]\n\n## [1.4.0] - 2026-09-10\n\n"
+        "### Added\n\n- Show a release summary.\n",
+        encoding="utf-8",
+    )
+    footer = tmp_path / "footer.md"
+    footer.write_text("## Install\n\nUse the package channel.\n", encoding="utf-8")
+
+    result = subprocess.run(
+        [
+            sys.executable,
+            str(EXTRACTOR_PATH),
+            str(changelog),
+            "1.4.0",
+            "--footer",
+            str(footer),
+        ],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+    assert result.returncode == 0
+    assert result.stdout == (
+        "## [1.4.0] - 2026-09-10\n\n### Added\n\n- Show a release summary.\n\n"
+        "## Install\n\nUse the package channel.\n"
+    )
+
+
+def test_release_request_command_reports_create_or_patch_decisions(tmp_path):
+    body = tmp_path / "release-body.md"
+    body.write_text("## [1.4.0] - 2026-09-10\n", encoding="utf-8")
+
+    create = subprocess.run(
+        [
+            sys.executable,
+            str(RELEASE_REQUEST_PATH),
+            "--version",
+            "1.4.0",
+            "--body-file",
+            str(body),
+        ],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    existing = tmp_path / "existing-release.json"
+    existing.write_text('{"id": 17, "assets": []}', encoding="utf-8")
+    patch = subprocess.run(
+        [
+            sys.executable,
+            str(RELEASE_REQUEST_PATH),
+            "--version",
+            "1.4.0",
+            "--body-file",
+            str(body),
+            "--existing-release",
+            str(existing),
+        ],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+    assert create.returncode == patch.returncode == 0
+    assert json.loads(create.stdout) == {
+        "method": "POST",
+        "path": "/releases",
+        "payload": {
+            "tag_name": "v1.4.0",
+            "name": "v1.4.0",
+            "body": "## [1.4.0] - 2026-09-10\n",
+        },
+    }
+    assert json.loads(patch.stdout) == {
+        "method": "PATCH",
+        "path": "/releases/17",
+        "payload": {"body": "## [1.4.0] - 2026-09-10\n"},
+    }