Remove __all__ in package root, add check for test data

Author: aromanielloNTIA

src/ITS/PropLibTemplate/__init__.py

@@ -6,6 +6,3 @@
 # from .proplib_template import (
 
 # )
-
-# TODO-TEMPLATE: Put the name of the module here
-__all__ = ["proplib_template"]

tests/test_utils.py

@@ -2,9 +2,17 @@
 from pathlib import Path
 
 # Test data is expected to exist in tests/data
-TEST_DATA_DIR = Path(__file__).parent / "data"
+# TODO-TEMPLATE: Remove the '#' in the line below after adding your test data submodule
+TEST_DATA_DIR = Path(__file__).parent  # / "data"
 ABSTOL__DB = 0.1  # Absolute tolerance, in dB, to ensure outputs match expected value
 
+# Check if test data directory exists and is not empty
+if not TEST_DATA_DIR.exists() or not any(TEST_DATA_DIR.iterdir()):
+    raise RuntimeError(
+        f"Test data is not available in {TEST_DATA_DIR}.\n Try running "
+        + "`git submodule init` and `git submodule update` to clone the test data submodule."
+    )
+
 
 # TODO-TEMPLATE: Update CSV reader based on test data CSV structure
 def read_csv_test_data(filename: str):