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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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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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 MinHashFilterFactoryTests extends ESTokenStreamTestCase {
public void testDefault() throws IOException {
int default_hash_count = 1;
int default_bucket_size = 512;
int default_hash_set_size = 1;
Settings settings = Settings.builder()
.put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
.build();
ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
TokenFilterFactory tokenFilter = analysis.tokenFilter.get("min_hash");
String source = "the quick brown fox";
Tokenizer tokenizer = new WhitespaceTokenizer();
tokenizer.setReader(new StringReader(source));
// with_rotation is true by default, and hash_set_size is 1, so even though the source doesn't
// have enough tokens to fill all the buckets, we still expect 512 tokens.
assertStreamHasNumberOfTokens(tokenFilter.create(tokenizer),
default_hash_count * default_bucket_size * default_hash_set_size);
}
public void testSettings() throws IOException {
Settings settings = Settings.builder()
.put("index.analysis.filter.test_min_hash.type", "min_hash")
.put("index.analysis.filter.test_min_hash.hash_count", "1")
.put("index.analysis.filter.test_min_hash.bucket_count", "2")
.put("index.analysis.filter.test_min_hash.hash_set_size", "1")
.put("index.analysis.filter.test_min_hash.with_rotation", false)
.put(Environment.PATH_HOME_SETTING.getKey(), createTempDir().toString())
.build();
ESTestCase.TestAnalysis analysis = AnalysisTestsHelper.createTestAnalysisFromSettings(settings);
TokenFilterFactory tokenFilter = analysis.tokenFilter.get("test_min_hash");
String source = "sushi";
Tokenizer tokenizer = new WhitespaceTokenizer();
tokenizer.setReader(new StringReader(source));
// despite the fact that bucket_count is 2 and hash_set_size is 1,
// because with_rotation is false, we only expect 1 token here.
assertStreamHasNumberOfTokens(tokenFilter.create(tokenizer), 1);
}
}