lucene/analysis/common/src/test/org/apache/lucene/analysis/miscellaneous/TestCodepointCountFilterFactory.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.miscellaneous;

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

public class TestCodepointCountFilterFactory extends BaseTokenStreamFactoryTestCase {

  public void testPositionIncrements() throws Exception {
    Reader reader = new StringReader("foo foobar super-duper-trooper");
    TokenStream stream = new MockTokenizer(MockTokenizer.WHITESPACE, false);
    ((Tokenizer) stream).setReader(reader);
    stream = tokenFilterFactory("CodepointCount", "min", "4", "max", "10").create(stream);
    assertTokenStreamContents(stream, new String[] {"foobar"}, new int[] {2});
  }

  /** Test that bogus arguments result in exception */
  public void testBogusArguments() throws Exception {
    IllegalArgumentException expected =
        expectThrows(
            IllegalArgumentException.class,
            () -> {
              tokenFilterFactory(
                  "CodepointCount", "min", "4", "max", "5", "bogusArg", "bogusValue");
            });
    assertTrue(expected.getMessage().contains("Unknown parameters"));
  }

  /** Test that invalid arguments result in exception */
  public void testInvalidArguments() throws Exception {
    IllegalArgumentException expected =
        expectThrows(
            IllegalArgumentException.class,
            () -> {
              Reader reader = new StringReader("foo foobar super-duper-trooper");
              TokenStream stream = new MockTokenizer(MockTokenizer.WHITESPACE, false);
              ((Tokenizer) stream).setReader(reader);
              tokenFilterFactory(
                      "CodepointCount",
                      CodepointCountFilterFactory.MIN_KEY,
                      "5",
                      CodepointCountFilterFactory.MAX_KEY,
                      "4")
                  .create(stream);
            });
    assertTrue(
        expected.getMessage().contains("maximum length must not be greater than minimum length"));
  }
}