Added some smoketests. CURA-3297

tests/Settings/TestCuraContainerRegistry.py

@@ -75,4 +75,4 @@ def test_loadLegacyFileRenamed(container_registry):
 
     assert not os.path.isfile(temp_file)
     new_filename = os.path.splitext(os.path.splitext(temp_file)[0])[0] + ".global.cfg"
-    assert os.path.isfile(new_filename)
+    assert os.path.isfile(new_filename)

tests/Settings/TestGlobalStack.py

@@ -544,3 +544,15 @@ def test_setVariantByIdExists(global_stack, container_registry):
 def test_setVariantByIdDoesntExist(global_stack):
     with pytest.raises(InvalidContainerError):
         global_stack.setVariantById("some_variant") #Container registry is empty now.
+
+##  Smoke test for findDefaultVariant
+def test_smoke_findDefaultVariant(global_stack):
+    global_stack.findDefaultVariant()
+
+##  Smoke test for findDefaultMaterial
+def test_smoke_findDefaultMaterial(global_stack):
+    global_stack.findDefaultMaterial()
+
+##  Smoke test for findDefaultQuality
+def test_smoke_findDefaultQuality(global_stack):
+    global_stack.findDefaultQuality()