LimitTokenCountFilterFactoryTests.java example

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 * the Apache License, Version 2.0 (the "License"); you may
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 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.index.analysis;

import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.core.WhitespaceTokenizer;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.ESTokenStreamTestCase;

import java.io.IOException;
import java.io.StringReader;

public class LimitTokenCountFilterFactoryTests extends ESTokenStreamTestCase {
    public void testDefault() throws IOException {
        Settings settings = Settings.builder()
                .put("index.analysis.filter.limit_default.type", "limit")
                .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
                .build();
        ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
        {
            TokenFilterFactory tokenFilter = analysis.tokenFilter.get("limit_default");
            String source = "the quick brown fox";
            String[] expected = new String[] { "the" };
            Tokenizer tokenizer = new WhitespaceTokenizer();
            tokenizer.setReader(new StringReader(source));
            assertTokenStreamContents(tokenFilter.create(tokenizer), expected);
        }
        {
            TokenFilterFactory tokenFilter = analysis.tokenFilter.get("limit");
            String source = "the quick brown fox";
            String[] expected = new String[] { "the" };
            Tokenizer tokenizer = new WhitespaceTokenizer();
            tokenizer.setReader(new StringReader(source));
            assertTokenStreamContents(tokenFilter.create(tokenizer), expected);
        }
    }

    public void testSettings() throws IOException {
        {
            Settings settings = Settings.builder()
                    .put("index.analysis.filter.limit_1.type", "limit")
                    .put("index.analysis.filter.limit_1.max_token_count", 3)
                    .put("index.analysis.filter.limit_1.consume_all_tokens", true)
                    .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
                    .build();
            ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
            TokenFilterFactory tokenFilter = analysis.tokenFilter.get("limit_1");
            String source = "the quick brown fox";
            String[] expected = new String[] { "the", "quick", "brown" };
            Tokenizer tokenizer = new WhitespaceTokenizer();
            tokenizer.setReader(new StringReader(source));
            assertTokenStreamContents(tokenFilter.create(tokenizer), expected);
        }
        {
            Settings settings = Settings.builder()
                    .put("index.analysis.filter.limit_1.type", "limit")
                    .put("index.analysis.filter.limit_1.max_token_count", 3)
                    .put("index.analysis.filter.limit_1.consume_all_tokens", false)
                    .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
                    .build();
            ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
            TokenFilterFactory tokenFilter = analysis.tokenFilter.get("limit_1");
            String source = "the quick brown fox";
            String[] expected = new String[] { "the", "quick", "brown" };
            Tokenizer tokenizer = new WhitespaceTokenizer();
            tokenizer.setReader(new StringReader(source));
            assertTokenStreamContents(tokenFilter.create(tokenizer), expected);
        }

        {
            Settings settings = Settings.builder()
                    .put("index.analysis.filter.limit_1.type", "limit")
                    .put("index.analysis.filter.limit_1.max_token_count", 17)
                    .put("index.analysis.filter.limit_1.consume_all_tokens", true)
                    .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
                    .build();
            ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
            TokenFilterFactory tokenFilter = analysis.tokenFilter.get("limit_1");
            String source = "the quick brown fox";
            String[] expected = new String[] { "the", "quick", "brown", "fox" };
            Tokenizer tokenizer = new WhitespaceTokenizer();
            tokenizer.setReader(new StringReader(source));
            assertTokenStreamContents(tokenFilter.create(tokenizer), expected);
        }
    }

}