add tests for base RasHdf class

tests/test_base.py

@@ -0,0 +1,20 @@
+from src.rashdf.base import RasHdf
+from unittest.mock import patch
+
+
+def test_open():
+    rasfile = "Muncie.g05.hdf"
+    rasfile_path = f"./tests/data/ras/{rasfile}"
+    hdf = RasHdf(rasfile_path)
+    assert hdf._loc == rasfile_path
+
+
+def test_open_uri():
+    rasfile = "Muncie.g05.hdf"
+    rasfile_path = f"./tests/data/ras/{rasfile}"
+    url = f"s3://mybucket/{rasfile}"
+
+    # Mock the specific functions used by s3fs
+    with patch("s3fs.core.S3FileSystem.open", return_value=open(rasfile_path, "rb")):
+        hdf = RasHdf.open_uri(url)
+        assert hdf._loc == url