Improve tests, downloader, and project config

- Expand blender_downloader with better error handling and platform support
- Add test_main.py for main module tests
- Expand test coverage for introspect and generate_stubs
- Remove reportUnknownMemberType suppression from conformance config
- Exclude conformance/ from ruff linting (docs examples have E402)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_main.py

@@ -0,0 +1,86 @@
+"""Tests for main orchestration helpers."""
+
+import tempfile
+import tomllib
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+import main
+
+
+class TestTemporaryConfigCleanup(unittest.TestCase):
+    def test_typecheck_stubs_removes_config_on_subprocess_exception(self) -> None:
+        with tempfile.TemporaryDirectory() as td:
+            script_dir = Path(td)
+            version_dir = script_dir / "dist" / "5.0"
+            version_dir.mkdir(parents=True)
+            (version_dir / ".python-version").write_text("3.11")
+            config_path = version_dir / "pyrightconfig.json"
+
+            with patch("main.SCRIPT_DIR", script_dir):
+                with patch("main.subprocess.run", side_effect=RuntimeError("boom")):
+                    with self.assertRaises(RuntimeError):
+                        main.typecheck_stubs(["5.0"])
+
+            self.assertFalse(config_path.exists())
+
+    def test_conformance_removes_config_on_subprocess_exception(self) -> None:
+        with tempfile.TemporaryDirectory() as td:
+            script_dir = Path(td)
+            version_dir = script_dir / "dist" / "5.0"
+            version_dir.mkdir(parents=True)
+            (version_dir / ".python-version").write_text("3.11")
+            test_dir = script_dir / "conformance" / "5.0"
+            test_dir.mkdir(parents=True)
+            (test_dir / "test_dummy.py").write_text("x = 1\n")
+            config_path = version_dir / "pyrightconfig.conformance.json"
+
+            with patch("main.SCRIPT_DIR", script_dir):
+                with patch("main.subprocess.run", side_effect=RuntimeError("boom")):
+                    with self.assertRaises(RuntimeError):
+                        main.conformance_check(["5.0"])
+
+            self.assertFalse(config_path.exists())
+
+
+class TestGeneratedPyproject(unittest.TestCase):
+    def test_generated_pyproject_is_valid_toml(self) -> None:
+        metadata: dict[str, object] = {
+            "name": "blender-python-stubs",
+            "license": "MIT",
+            "keywords": ["blender", "typing"],
+            "authors": [
+                {"name": "Alice", "email": "alice@example.com"},
+                {"name": "Bob"},
+            ],
+            "classifiers": ["Programming Language :: Python :: 3"],
+            "urls": {
+                "Homepage": "https://example.test/home",
+                "Issue Tracker": "https://example.test/issues",
+            },
+        }
+        with patch("main.load_project_metadata", return_value=metadata):
+            content = main.build_generated_pyproject(
+                blender_version="5.1",
+                package_version="5.1.0",
+                packages=["bpy", "mathutils"],
+                python_version="3.13",
+            )
+
+        parsed = tomllib.loads(content)
+        self.assertEqual(parsed["project"]["name"], "blender-python-stubs")
+        self.assertEqual(parsed["project"]["version"], "5.1.0")
+        self.assertEqual(parsed["project"]["requires-python"], ">=3.13")
+        self.assertEqual(
+            parsed["tool"]["hatch"]["build"]["targets"]["wheel"]["packages"],
+            ["bpy", "mathutils"],
+        )
+        self.assertEqual(
+            parsed["project"]["urls"]["Issue Tracker"],
+            "https://example.test/issues",
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()