Add regression test for serialization of statement groups

extensions/wikidata/tests/data/updates/statement_groups.json

@@ -0,0 +1,111 @@
+{
+  "addedAliases": [],
+  "addedStatementGroups": [
+    {
+      "property": {
+        "type": "wikibase-entityid",
+        "value": {
+          "entity-type": "property",
+          "id": "P348",
+          "numeric-id": 348
+        }
+      },
+      "statements": [
+        {
+          "mainsnak": {
+            "property": "P348",
+            "snaktype": "novalue"
+          },
+          "rank": "normal",
+          "type": "statement"
+        }
+      ],
+      "subject": {
+        "type": "wikibase-entityid",
+        "value": {
+          "entity-type": "item",
+          "id": "Q34",
+          "numeric-id": 34
+        }
+      }
+    },
+    {
+      "property": {
+        "type": "wikibase-entityid",
+        "value": {
+          "entity-type": "property",
+          "id": "P52",
+          "numeric-id": 52
+        }
+      },
+      "statements": [
+        {
+          "mainsnak": {
+            "datatype": "wikibase-item",
+            "datavalue": {
+              "entityType": "http://www.wikidata.org/ontology#Item",
+              "id": "Q1234",
+              "iri": "http://localhost/entity/Q1234",
+              "label": "new item",
+              "reconInternalId": 1234,
+              "siteIri": "http://localhost/entity/",
+              "types": []
+            },
+            "property": "P52",
+            "snaktype": "value"
+          },
+          "rank": "normal",
+          "type": "statement"
+        }
+      ],
+      "subject": {
+        "type": "wikibase-entityid",
+        "value": {
+          "entity-type": "item",
+          "id": "Q34",
+          "numeric-id": 34
+        }
+      }
+    }
+  ],
+  "addedStatements": [
+    {
+      "mainsnak": {
+        "property": "P348",
+        "snaktype": "novalue"
+      },
+      "rank": "normal",
+      "type": "statement"
+    },
+    {
+      "mainsnak": {
+        "datatype": "wikibase-item",
+        "datavalue": {
+          "entityType": "http://www.wikidata.org/ontology#Item",
+          "id": "Q1234",
+          "iri": "http://localhost/entity/Q1234",
+          "label": "new item",
+          "reconInternalId": 1234,
+          "siteIri": "http://localhost/entity/",
+          "types": []
+        },
+        "property": "P52",
+        "snaktype": "value"
+      },
+      "rank": "normal",
+      "type": "statement"
+    }
+  ],
+  "deletedStatements": [],
+  "descriptions": [],
+  "labels": [],
+  "new": false,
+  "subject": {
+    "type": "wikibase-entityid",
+    "value": {
+      "entity-type": "item",
+      "id": "Q34",
+      "numeric-id": 34
+    }
+  }
+}

extensions/wikidata/tests/src/org/openrefine/wikidata/updates/ItemUpdateTest.java

@@ -28,6 +28,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
 
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
@@ -48,6 +49,8 @@ import org.wikidata.wdtk.datamodel.interfaces.Statement;
 import org.wikidata.wdtk.datamodel.interfaces.StatementGroup;
 import org.wikidata.wdtk.datamodel.interfaces.StatementRank;
 
+import com.google.refine.tests.util.TestUtils;
+
 public class ItemUpdateTest {
 
     private ItemIdValue existingSubject = Datamodel.makeWikidataItemIdValue("Q34");
@@ -111,6 +114,13 @@ public class ItemUpdateTest {
         assertEquals(statementGroups, update.getAddedStatementGroups().stream().collect(Collectors.toSet()));
     }
     
+    @Test
+    public void testSerializeStatements() throws IOException {
+    	ItemUpdate update = new ItemUpdateBuilder(existingSubject).addStatement(statement1).addStatement(statement2)
+                .build();
+    	TestUtils.isSerializedTo(update, TestingData.jsonFromFile("updates/statement_groups.json"));
+    }
+
     @Test
     public void testDeleteStatements() {
         ItemUpdate update = new ItemUpdateBuilder(existingSubject).deleteStatement(statement1)