如何为 Elasticsearch 自定义插件编写测试？

Question

我创建自定义 Elasticsearch 插件。现在我想为这个插件写一个测试。我的期望是 - 我可以运行嵌入 Elasticsearch 实例，正确设置它然后做一些测试（索引一些文档，然后查询它）

问题是我无法正确设置我的插件

自定义插件代码正在解析 JSON 查询并设置一些对象供以后使用：

public class CustomQueryParserPlugin extends AbstractPlugin {
    public static final String PLUGIN_NAME = "custom_query";
    private final Settings settings;

    @Inject
    public CustomQueryParserPlugin (Settings settings) {
        this.settings = settings;
    }

    @Override
    public String name() {
        return PLUGIN_NAME;
    }

    @Override
    public String description() {
        return "custom plugin";
    }

    public void onModule(IndicesQueriesModule module) {
        module.addQuery(new CustomQueryParser(settings));
    }
}

测试代码：

public class CustomParserPluginTest extends ElasticsearchSingleNodeTest {

    private static Node newNode() {
        final Settings settings = ImmutableSettings.builder()
                .put(ClusterName.SETTING, nodeName())
                .put("node.name", nodeName())
                .put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, 1)
                .put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, 0)
                .put(EsExecutors.PROCESSORS, 1) // limit the number of threads created
                .put("http.enabled", false)
                .put("plugin.types", CustomParserPlugin.class.getName())
                .put("path.plugins", pathToPlugin)
                .put("index.store.type", "ram")
                .put("config.ignore_system_properties", true) // make sure we get what we set :)
                .put("gateway.type", "none").build();
        Node build = NodeBuilder.nodeBuilder().local(true).data(true).settings(
                settings).build();
        build.start();
        assertThat(DiscoveryNode.localNode(build.settings()), is(true));
        return build;
    }


    @Test
    public void jsonParsing() throws URISyntaxException {
        final Client client = newNode().client();
        final SearchResponse test = client.prepareSearch("test-index").setSource(addQuery()).execute().actionGet();
    }

    private String addQuery() {
         return "{"match_all":{"boost":1.2}}"
    }

我已经为 pathToPlugin 尝试了多个值 - 但似乎没有任何效果，因为 JSON 查询总是给我一个例外：

QueryParsingException[[test-index] No query registered for [custom_query]];

我能找到的所有文档都是关于安装插件并在某些本地 Elasticsearch 安装上测试它们的。

我这里做错了什么？有这样的文档或测试示例吗？

UPD。这是一个带有 CustomQueryParserPlugin 提取代码的回购 - https://github.com/MysterionRise/es-custom-parser

可能在测试的初始化部分我需要在内存中创建索引？

Answer 1

要为您的插件编写测试，您可以使用 Elasticsearch Cluster Runner。作为参考检查 MinHash Plugin 是如何编写测试的。

更新：

我已将 CustomParserPluginTest class 更改为使用 Elasticsearch Cluster Runner：

import static org.codelibs.elasticsearch.runner.ElasticsearchClusterRunner.newConfigs;
import java.util.Map;
import junit.framework.TestCase;
import org.codelibs.elasticsearch.runner.ElasticsearchClusterRunner;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.ImmutableSettings.Builder;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.index.get.GetField;
import org.junit.Assert;
import org.elasticsearch.action.search.SearchResponse;
import static org.hamcrest.core.Is.is;

public class CustomParserPluginTest extends TestCase {

    private ElasticsearchClusterRunner runner;

    @Override
    protected void setUp() throws Exception {
        // create runner instance
        runner = new ElasticsearchClusterRunner();
        // create ES nodes
        runner.onBuild(new ElasticsearchClusterRunner.Builder() {
            @Override
            public void build(final int number, final Builder settingsBuilder) {
            }
        }).build(newConfigs().ramIndexStore().numOfNode(1));

        // wait for yellow status
        runner.ensureYellow();
    }

    @Override
    protected void tearDown() throws Exception {
        // close runner
        runner.close();
        // delete all files
        runner.clean();
    }

    public void test_jsonParsing() throws Exception {
        final String index = "test_index";

        runner.createIndex(index, ImmutableSettings.builder().build());
        runner.ensureYellow(index);

        final SearchResponse test = runner.client().prepareSearch(index).setSource(addQuery()).execute().actionGet();
    }

    private String addQuery() {
        return "{\"match_all\":{\"boost\":1.2}}";
    }
}

我创建了 es-plugin.properties(pluginrootdirectory\src\main\resources) 文件，其中包含以下内容，这将强制 elasticsearch 实例加载插件：

plugin=CustomQueryParserPlugin

当您运行这个测试时，您将在输出中看到新创建的 elasticsearch 实例加载了插件。

[2015-04-29 19:22:10,783][INFO ][org.elasticsearch.node ] [Node 1] version[1.5 .0], pid[34360], build[5448160/2015-03-23T14:30:58Z] [2015-04-29 19:22:10,784][INFO ][org.elasticsearch.node ] [Node 1] initializin g ... [2015-04-29 19:22:10,795][INFO ][org.elasticsearch.plugins] [Node 1] loaded [custom_query], sites [] [2015-04-29 19:22:13,342][INFO ][org.elasticsearch.node ] [Node 1] initialized

[2015-04-29 19:22:13,342][INFO ][org.elasticsearch.node ] [Node 1] starting .. .

希望对您有所帮助。

如何为 Elasticsearch 自定义插件编写测试？

How to write a test for Elasticsearch custom plugin?

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