chore: adjust tsts

tests/py/unit/materials/test_standata_init.py

@@ -3,32 +3,29 @@
 
 def test_standata_materials_init():
     """Materials class is initialized with data based on materials_data"""
-    std_materials = Materials()
-    assert std_materials.data.standataConfig.entities is not None
-    assert len(std_materials.data.standataConfig.entities) >= 1
-    assert isinstance(std_materials.data.filesMapByName.dictionary, dict)
-    assert len(std_materials.data.filesMapByName.dictionary) >= 1
+    assert Materials.data.standataConfig.entities is not None
+    assert len(Materials.data.standataConfig.entities) >= 1
+    assert isinstance(Materials.data.filesMapByName.dictionary, dict)
+    assert len(Materials.data.filesMapByName.dictionary) >= 1
 
 
 def test_categories_data():
     """Category map has at least one group of tags."""
-    std_materials = Materials()
-    assert std_materials.data.standataConfig.categories is not None
+    std_materials = Materials
+    assert Materials.data.standataConfig.categories is not None
     assert len(std_materials.data.standataConfig.categories) >= 1
 
 
 def test_get_by_name():
     """Assert correct information if found about a material."""
-    std_materials = Materials()
-    material = std_materials.get_by_name("Graphene")[0]
+    material = Materials.get_by_name_first_match("Graphene")
     assert type(material) == dict
     assert material["name"] == "C, Graphene, HEX (P6/mmm) 2D (Monolayer), 2dm-3993"
     assert material["isNonPeriodic"] is False
 
 
 def test_get_by_categories():
     """Assert correct information if found about a material."""
-    std_materials = Materials()
-    material = std_materials.get_by_categories("2D")
+    material = Materials.get_by_categories("2D")
     assert isinstance(material, list)
     assert material[0]["name"] == "C, Graphene, HEX (P6/mmm) 2D (Monolayer), 2dm-3993"