/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.analysis.common;

import org.apache.lucene.analysis.CannedTokenStream;
import org.apache.lucene.analysis.Token;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.analysis.AnalysisTestsHelper;
import org.elasticsearch.index.analysis.TokenFilterFactory;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.ESTokenStreamTestCase;

import java.io.IOException;

import static org.hamcrest.Matchers.instanceOf;

public class RemoveDuplicatesFilterFactoryTests extends ESTokenStreamTestCase {

    public void testRemoveDuplicatesFilter() throws IOException {
        Settings settings = Settings.builder()
            .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
            .put("index.analysis.filter.removedups.type", "remove_duplicates")
            .build();
        ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings, new CommonAnalysisPlugin());
        TokenFilterFactory tokenFilter = analysis.tokenFilter.get("removedups");
        assertThat(tokenFilter, instanceOf(RemoveDuplicatesTokenFilterFactory.class));

        CannedTokenStream cts = new CannedTokenStream(
            new Token("a", 1, 0, 1),
            new Token("b", 1, 2, 3),
            new Token("c", 0, 2, 3),
            new Token("b", 0, 2, 3),
            new Token("d", 1, 4, 5)
        );

        assertTokenStreamContents(tokenFilter.create(cts), new String[]{
            "a", "b", "c", "d"
        }, new int[]{
             1,   1,   0,   1
        });
    }

}
