solr/contrib/prometheus-exporter/src/test/org/apache/solr/prometheus/collector/SolrCollectorTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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.apache.solr.prometheus.collector;

import org.apache.solr.core.Config;
import org.apache.solr.core.SolrResourceLoader;
import org.apache.solr.prometheus.exporter.SolrExporter;
import org.apache.solr.prometheus.exporter.SolrExporterTestBase;
import io.prometheus.client.CollectorRegistry;
import org.apache.lucene.util.LuceneTestCase.Slow;
import org.apache.solr.client.solrj.impl.CloudSolrClient;
import org.apache.solr.client.solrj.request.ContentStreamUpdateRequest;
import org.junit.Test;

import java.io.File;
import java.util.Arrays;
import java.util.List;

/**
 * Unit test for SolrCollector.
 */
@Slow
public class SolrCollectorTest extends SolrExporterTestBase {
  CollectorRegistry registry;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    registry = new CollectorRegistry();
  }

  @Override
  public void tearDown() throws Exception {
    super.tearDown();
  }

  @Test
  public void testSolrCollector() throws Exception {
    String name = "solr-exporter-config.xml";
    SolrResourceLoader loader = new SolrResourceLoader(getFile("conf/").toPath());
    Config config = new Config(loader, name);

    CloudSolrClient cloudSolrClient = cluster.getSolrClient();

    SolrCollector collector = new SolrCollector(cloudSolrClient, config, 1);

    assertNotNull(collector);
  }

  @Test
  public void testCollect() throws Exception {
    String name = "solr-exporter-config.xml";
    SolrResourceLoader loader = new SolrResourceLoader(getFile("conf/").toPath());
    Config config = new Config(loader, name);

    CloudSolrClient cloudSolrClient = cluster.getSolrClient();

    SolrCollector collector = new SolrCollector(cloudSolrClient, config, 1);

    this.registry.register(collector);
    this.registry.register(SolrExporter.scrapeErrorTotal);

    // index sample docs
    File exampleDocsDir = new File(getFile("exampledocs").getAbsolutePath());
    List<File> xmlFiles = Arrays.asList(exampleDocsDir.listFiles((dir, file) -> file.endsWith(".xml")));
    for (File xml : xmlFiles) {
      ContentStreamUpdateRequest req = new ContentStreamUpdateRequest("/update");
      req.addFile(xml, "application/xml");
      cloudSolrClient.request(req, "collection1");
    }
    cloudSolrClient.commit("collection1");

    // collect metrics
    collector.collect();

    // check scrape error count
    assertEquals(0.0, registry.getSampleValue("solr_exporter_scrape_error_total", new String[]{}, new String[]{}), .001);
  }
}