fix many issues

atlas/tests/test_series_viewer_description.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import pytest
+
+from atlas.models import SeriesImage, _populate_case_study_date_on_series_image_save
+
+
+@pytest.mark.django_db
+def test_series_viewer_stack_description_includes_plane_and_contrast(create_series):
+    series = create_series
+
+    assert series.get_viewer_stack_description() == "Test Examination (Test Plane) / Test Contrast"
+    assert series.get_series_dicom_json()["SeriesDescription"] == "Test Examination (Test Plane) / Test Contrast"
+
+
+@pytest.mark.django_db
+def test_series_image_save_hook_handles_missing_basic_dicom_tags(create_series):
+    image = SeriesImage(series=create_series)
+
+    _populate_case_study_date_on_series_image_save(SeriesImage, image)