/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
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/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.analysis.common;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.en.EnglishAnalyzer;
import org.opensearch.test.OpenSearchTokenStreamTestCase;

public class SnowballAnalyzerTests extends OpenSearchTokenStreamTestCase {

    public void testEnglish() throws Exception {
        Analyzer a = new SnowballAnalyzer("English");
        assertAnalyzesTo(a, "he abhorred accents", new String[] { "he", "abhor", "accent" });
    }

    public void testStopwords() throws Exception {
        Analyzer a = new SnowballAnalyzer("English", EnglishAnalyzer.ENGLISH_STOP_WORDS_SET);
        assertAnalyzesTo(a, "the quick brown fox jumped", new String[] { "quick", "brown", "fox", "jump" });
    }

    /**
     * Test turkish lowercasing
     */
    public void testTurkish() throws Exception {
        Analyzer a = new SnowballAnalyzer("Turkish");

        assertAnalyzesTo(a, "ağacı", new String[] { "ağaç" });
        assertAnalyzesTo(a, "AĞACI", new String[] { "ağaç" });
    }

    public void testReusableTokenStream() throws Exception {
        Analyzer a = new SnowballAnalyzer("English");
        assertAnalyzesTo(a, "he abhorred accents", new String[] { "he", "abhor", "accent" });
        assertAnalyzesTo(a, "she abhorred him", new String[] { "she", "abhor", "him" });
    }
}