use test dir from environment if exists, for package testing

.ruff.toml

@@ -1,3 +1,4 @@
+fix = true
 select = ["D", "E", "F", "I"]
 ignore = ["D212"]
 line-length = 100

tests/test_wandb.py

@@ -1,18 +1,26 @@
+import os
 import unittest
 from os.path import join
 from unittest.mock import Mock, patch
 
 import pandas as pd
 
 from rsmtool.configuration_parser import Configuration
-from rsmtool.test_utils import rsmtool_test_dir
 from rsmtool.utils.wandb import (
     init_wandb_run,
     log_configuration_to_wandb,
     log_dataframe_to_wandb,
     log_report_to_wandb,
 )
 
+# allow test directory to be set via an environment variable
+# which is needed for package testing
+TEST_DIR = os.environ.get("TESTDIR", None)
+if TEST_DIR:
+    rsmtool_test_dir = TEST_DIR
+else:
+    from rsmtool.test_utils import rsmtool_test_dir
+
 
 class TestWandb(unittest.TestCase):
     def test_init_wandb_run_wandb_enabled(self):