added orso_utils tests

Author: rozyczko

tests/test_orso_utils.py

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2025 DMSC
+
+import pytest
+from orsopy.fileio import orso
+
+from easyreflectometry.orso_utils import (
+    LoadOrso,
+    load_data_from_orso_file,
+    load_orso_data,
+    load_orso_model,
+)
+
+
+@pytest.fixture
+def orso_data():
+    """Load the test ORSO data from Ni_example.ort."""
+    return orso.load_orso("Ni_example.ort")
+
+
+def test_load_orso_model(orso_data):
+    """Test loading a model from ORSO data."""
+    sample = load_orso_model(orso_data)
+    assert sample is not None
+    assert sample.name == "Ni on Si"  # Based on the file
+
+
+def test_load_orso_data(orso_data):
+    """Test loading data from ORSO data."""
+    data = load_orso_data(orso_data)
+    assert data is not None
+    # Check structure, e.g., has R_0 in data
+    assert "R_0" in data["data"]
+
+
+def test_LoadOrso(orso_data):
+    """Test the LoadOrso function."""
+    sample, data = LoadOrso(orso_data)
+    assert sample is not None
+    assert data is not None
+    # Similar checks as above
+
+
+def test_load_data_from_orso_file():
+    """Test loading data from ORSO file."""
+    data = load_data_from_orso_file("Ni_example.ort")
+    assert data is not None
+    # Check it's a sc.DataGroup
+    import scipp as sc
+    assert isinstance(data, sc.DataGroup)