Fix ReactiveIndicesTemplate: Refresh not called on bound indices.

Original Pull Request #2444
Closes #2441

Author: ls-urs-keller

src/main/java/org/springframework/data/elasticsearch/client/elc/ReactiveIndicesTemplate.java

@@ -154,7 +154,8 @@ public Mono<Boolean> exists() {
 
 	@Override
 	public Mono<Void> refresh() {
-		return Mono.from(execute(ReactiveElasticsearchIndicesClient::refresh)).then();
+		RefreshRequest refreshRequest = requestConverter.indicesRefreshRequest(getIndexCoordinates());
+		return Mono.from(execute(client -> client.refresh(refreshRequest))).then();
 	}
 
 	@Override

src/test/java/org/springframework/data/elasticsearch/client/elc/ReactiveIndicesTemplateTest.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2021-2023 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.data.elasticsearch.client.elc;
+
+import co.elastic.clients.elasticsearch.indices.RefreshRequest;
+import co.elastic.clients.json.JsonpMapper;
+import co.elastic.clients.transport.ElasticsearchTransport;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
+import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.*;
+
+/**
+ * @author Urs Keller
+ * @since 5.0
+ */
+@ExtendWith(MockitoExtension.class)
+class ReactiveIndicesTemplateTest {
+	@Mock private ElasticsearchConverter elasticsearchConverter;
+	@Mock private ReactiveElasticsearchIndicesClient client;
+	@Mock private ElasticsearchTransport transport;
+	@Mock private JsonpMapper jsonpMapper;
+	@Captor ArgumentCaptor<RefreshRequest> refreshRequest;
+
+	@BeforeEach
+	void setup() {
+		doReturn(transport).when(client)._transport();
+		doReturn(jsonpMapper).when(transport).jsonpMapper();
+	}
+
+	/**
+	 * Tests that refresh is called with the indices bound to the template
+	 */
+	@Test
+	void refresh() {
+		IndexCoordinates indexCoordinate = IndexCoordinates.of("i1", "i2");
+		ReactiveIndicesTemplate template = new ReactiveIndicesTemplate(client, elasticsearchConverter, indexCoordinate);
+		doReturn(Mono.empty()).when(client).refresh(any(RefreshRequest.class));
+
+		template.refresh().as(StepVerifier::create).verifyComplete();
+
+		verify(client).refresh(refreshRequest.capture());
+		assertEquals(List.of("i1", "i2"), refreshRequest.getValue().index());
+
+		verifyNoMoreInteractions(elasticsearchConverter, client, transport, jsonpMapper);
+	}
+}