1 files changed, 43 insertions, 0 deletions
diff --git a/contrib/python/propcache/tests/test_init.py b/contrib/python/propcache/tests/test_init.py
new file mode 100644
index 00000000000..6bcffe7faa6
--- /dev/null
+++ b/contrib/python/propcache/tests/test_init.py
@@ -0,0 +1,43 @@
+"""Test imports can happen from top-level."""
+
+import pytest
+
+import propcache
+from propcache import _helpers
+
+
+def test_api_at_top_level() -> None:
+    """Verify the public API is accessible at top-level."""
+    assert propcache.cached_property is not None
+    assert propcache.under_cached_property is not None
+    assert propcache.cached_property is _helpers.cached_property
+    assert propcache.under_cached_property is _helpers.under_cached_property
+
+
+[email protected](
+    "prop_name",
+    ("cached_property", "under_cached_property"),
+)
+def test_public_api_is_discoverable_in_dir(prop_name: str) -> None:
+    """Verify the public API is discoverable programmatically."""
+    assert prop_name in dir(propcache)
+
+
+def test_importing_invalid_attr_raises() -> None:
+    """Verify importing an invalid attribute raises an AttributeError."""
+    match = r"^module 'propcache' has no attribute 'invalid_attr'$"
+    with pytest.raises(AttributeError, match=match):
+        propcache.invalid_attr
+
+
+def test_import_error_invalid_attr() -> None:
+    """Verify importing an invalid attribute raises an ImportError."""
+    # No match here because the error is raised by the import system
+    # and may vary between Python versions.
+    with pytest.raises(ImportError):
+        from propcache import invalid_attr  # noqa: F401
+
+
+def test_no_wildcard_imports() -> None:
+    """Verify wildcard imports are prohibited."""
+    assert not propcache.__all__