Add test for check toObjectMap method allows null metadata values

Signed-off-by: WOONBE <[email protected]>

Author: WOONBE

vector-stores/spring-ai-qdrant-store/src/test/java/org/springframework/ai/vectorstore/qdrant/QdrantObjectFactoryTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2023-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      <https://www.apache.org/licenses/LICENSE-2.0>
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ai.vectorstore.qdrant;
+
+import java.util.Map;
+
+import io.qdrant.client.grpc.JsonWithInt.NullValue;
+import io.qdrant.client.grpc.JsonWithInt.Value;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link QdrantObjectFactory}.
+ *
+ * @author Heonwoo Kim
+ */
+class QdrantObjectFactoryTest {
+
+	@Test
+	void toObjectMapShouldHandleNullValues() {
+
+		Map<String, Value> payloadWithNull = Map.of(
+				"name", Value.newBuilder().setStringValue("Spring AI").build(),
+				"version", Value.newBuilder().setDoubleValue(1.0).build(),
+				"is_ga", Value.newBuilder().setBoolValue(true).build(),
+				"description", Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build()
+		);
+
+		Map<String, Object> result = QdrantObjectFactory.toObjectMap(payloadWithNull);
+
+
+		assertThat(result).isNotNull();
+
+		assertThat(result).hasSize(4);
+
+		assertThat(result.get("name")).isEqualTo("Spring AI");
+		assertThat(result.get("version")).isEqualTo(1.0);
+		assertThat(result.get("is_ga")).isEqualTo(true);
+
+		assertThat(result).containsKey("description");
+		assertThat(result.get("description")).isNull();
+	}
+
+}