lucene/analysis/common/src/test/org/apache/lucene/analysis/classic/TestClassicFactories.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */
package org.apache.lucene.analysis.classic;

import java.io.Reader;
import java.io.StringReader;
import org.apache.lucene.analysis.BaseTokenStreamFactoryTestCase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;

/** Simple tests to ensure the classic lucene factories are working. */
public class TestClassicFactories extends BaseTokenStreamFactoryTestCase {
  /** Test ClassicTokenizerFactory */
  public void testClassicTokenizer() throws Exception {
    Reader reader = new StringReader("What's this thing do?");
    Tokenizer stream = tokenizerFactory("Classic").create(newAttributeFactory());
    stream.setReader(reader);
    assertTokenStreamContents(stream, new String[] {"What's", "this", "thing", "do"});
  }

  public void testClassicTokenizerMaxTokenLength() throws Exception {
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < 100; ++i) {
      builder.append("abcdefg"); // 7 * 100 = 700 char "word"
    }
    String longWord = builder.toString();
    String content = "one two three " + longWord + " four five six";
    Reader reader = new StringReader(content);
    Tokenizer stream =
        tokenizerFactory("Classic", "maxTokenLength", "1000").create(newAttributeFactory());
    stream.setReader(reader);
    assertTokenStreamContents(
        stream, new String[] {"one", "two", "three", longWord, "four", "five", "six"});
  }

  /** Test ClassicFilterFactory */
  public void testClassicFilter() throws Exception {
    Reader reader = new StringReader("What's this thing do?");
    Tokenizer tokenizer = tokenizerFactory("Classic").create(newAttributeFactory());
    tokenizer.setReader(reader);
    TokenStream stream = tokenFilterFactory("Classic").create(tokenizer);
    assertTokenStreamContents(stream, new String[] {"What", "this", "thing", "do"});
  }

  /** Test that bogus arguments result in exception */
  public void testBogusArguments() throws Exception {
    IllegalArgumentException expected =
        expectThrows(
            IllegalArgumentException.class,
            () -> {
              tokenizerFactory("Classic", "bogusArg", "bogusValue");
            });
    assertTrue(expected.getMessage().contains("Unknown parameters"));

    expected =
        expectThrows(
            IllegalArgumentException.class,
            () -> {
              tokenFilterFactory("Classic", "bogusArg", "bogusValue");
            });
    assertTrue(expected.getMessage().contains("Unknown parameters"));
  }
}