fix R77 issue with lists of alternative labels + new test_b03m

Author: JuliusFiedler

src/pyirk/core.py

@@ -1539,10 +1539,12 @@ def process(self):
             existing_value = self.new_kwargs.get(skwap.new_key)
             if existing_value is None:
                 self.new_kwargs[skwap.new_key] = skwap.new_value
-            elif isinstance(existing_value, list):
-                existing_value.append(skwap.new_value)
             else:
-                self.new_kwargs[skwap.new_key] = [existing_value, skwap.new_value]
+                if not isinstance(existing_value, list):
+                    existing_value = [existing_value]
+                if not isinstance(skwap.new_value, list):
+                    skwap.new_value = [skwap.new_value]
+                self.new_kwargs[skwap.new_key] = [*existing_value, *skwap.new_value]
 
         return self.new_kwargs, self.lang_related_kwargs
 

tests/test_core.py

@@ -1958,6 +1958,28 @@ def test_b02m__multilingual_relations2(self):
             expected_result = [p.Literal("test1", lang="en"), p.Literal("test2", lang="en")]
             self.assertEqual(I1001.R77__has_alternative_label, expected_result)
 
+    def test_b03m__multilingual_relations3(self):
+        """test list of multiple alternative labels"""
+        with p.uri_context(uri=TEST_BASE_URI, prefix="ut"):
+            I1000 = p.create_item(
+                R1__has_label="foo",
+                R77__has_alternative_label=["df1", "df2"],
+                R77__has_alternative_label__de="de1",
+            )
+            self.assertEqual(I1000.R77__has_alternative_label, ["df1" @ p.df, "df2" @ p.df, "de1" @ p.de])
+            I1001 = p.create_item(
+                R1__has_label="foo",
+                R77__has_alternative_label="df1",
+                R77__has_alternative_label__de=["de1", "de2"],
+            )
+            self.assertEqual(I1001.R77__has_alternative_label, ["df1" @ p.df, "de1" @ p.de, "de2" @ p.de])
+            I1002 = p.create_item(
+                R1__has_label="foo",
+                R77__has_alternative_label=["df1", "df2"],
+                R77__has_alternative_label__de=["de1", "de2"],
+            )
+            self.assertEqual(I1002.R77__has_alternative_label, ["df1" @ p.df, "df2" @ p.df, "de1" @ p.de, "de2" @ p.de])
+
 
 class Test_04_Core(HousekeeperMixin, unittest.TestCase):
     """