fix: stop excluding dist-info from packaged extension

.vscodeignore

@@ -17,7 +17,6 @@ vsc-extension-quickstart.md
 **/__pycache__/**
 **/*.pyc
 bundled/libs/bin/**
-bundled/libs/*.dist-info/**
 noxfile.py
 .pytest_cache/**
 .pylintrc

src/test/python_tests/test_packaging.py

@@ -0,0 +1,38 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+"""Tests that bundled package metadata is intact.
+
+The extension ships bundled Python packages in ``bundled/libs/``.
+Some packages use ``importlib.metadata`` at runtime to resolve their
+version string, which requires the corresponding ``.dist-info``
+directory to be present.  These tests verify the metadata was not
+accidentally excluded.
+"""
+
+import importlib.metadata
+import pathlib
+import sys
+
+import pytest
+
+BUNDLED_LIBS = pathlib.Path(__file__).parent.parent.parent.parent / "bundled" / "libs"
+
+
+@pytest.fixture(autouse=True)
+def _ensure_bundled_on_path():
+    """Temporarily prepend ``bundled/libs`` to ``sys.path``."""
+    libs = str(BUNDLED_LIBS)
+    if libs not in sys.path:
+        sys.path.insert(0, libs)
+        yield
+        sys.path.remove(libs)
+    else:
+        yield
+
+
+def test_black_metadata_version():
+    """importlib.metadata must be able to resolve the bundled black version."""
+    version = importlib.metadata.version("black")
+    assert version, "black version string should not be empty"
+    parts = version.split(".")
+    assert len(parts) >= 2, f"Unexpected version format: {version}"