Add another test failing for #561 on master

Author: cowtowncoder

protobuf/src/test/java/tools/jackson/dataformat/protobuf/ReadPackedRepeatedTest.java

@@ -1,6 +1,7 @@
 package tools.jackson.dataformat.protobuf;
 
 import java.io.StringReader;
+import java.util.Map;
 
 import org.junit.jupiter.api.Test;
 
@@ -12,7 +13,7 @@
 
 public class ReadPackedRepeatedTest extends ProtobufTestBase
 {
-    final ProtobufMapper MAPPER = new ProtobufMapper();
+    private final ProtobufMapper MAPPER = newObjectMapper();
 
     @Test
     public void testPacked() throws Exception
@@ -31,4 +32,26 @@ public void testPacked() throws Exception
         assertEquals(100, t.get("f").get(0).asInt());
         assertEquals(200, t.get("f").get(1).asInt());
     }
+
+    // 31-Jan-2025, tatu: [dataformats-binary#561] Problem with sparse arrays
+    //   and trailing END_OBJECT
+    @Test
+    public void testSparse561() throws Exception
+    {
+        final String SCHEMA_STR =
+            "package mypackage;\n"
+            + "message t {\n"
+            + "        repeated uint32 f = 1;\n"
+            + "}";
+
+        Map<String, Object> input = Map.of("f", new int[] { 1, 2 });
+
+        ProtobufSchema schema = MAPPER.schemaLoader().load(new StringReader(SCHEMA_STR));
+        byte[] encoded = MAPPER.writer(schema).writeValueAsBytes(input);
+        JsonNode t = MAPPER.readerFor(JsonNode.class).with(schema).readValue(encoded);
+
+        assertEquals(2, t.get("f").size());
+        assertEquals(1, t.get("f").get(0).asInt());
+        assertEquals(2, t.get("f").get(1).asInt());
+    }
 }

protobuf/src/test/java/tools/jackson/dataformat/protobuf/WriteAsMapTest.java

@@ -15,7 +15,7 @@ public class WriteAsMapTest extends ProtobufTestBase
     final static String PROTOC =
             "package tutorial;\n"
 +"message Person {\n"
-+" required string name = 1;\n"
++"  required string name = 1;\n"
 +"  required int32 id = 2;\n"
 +"  optional string email = 3;\n"
 +"  enum PhoneType {\n"