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/*
* 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.
*/
package org.elasticsearch.search.suggest.term;
import org.elasticsearch.common.io.stream.AbstractWriteableEnumTestCase;
import java.io.IOException;
import static org.elasticsearch.search.suggest.term.TermSuggestionBuilder.StringDistanceImpl;
import static org.hamcrest.Matchers.equalTo;
/**
* Test for the {@link StringDistanceImpl} enum.
*/
public class StringDistanceImplTests extends AbstractWriteableEnumTestCase {
public StringDistanceImplTests() {
super(StringDistanceImpl::readFromStream);
}
@Override
public void testValidOrdinals() {
assertThat(StringDistanceImpl.INTERNAL.ordinal(), equalTo(0));
assertThat(StringDistanceImpl.DAMERAU_LEVENSHTEIN.ordinal(), equalTo(1));
assertThat(StringDistanceImpl.LEVENSTEIN.ordinal(), equalTo(2));
assertThat(StringDistanceImpl.JAROWINKLER.ordinal(), equalTo(3));
assertThat(StringDistanceImpl.NGRAM.ordinal(), equalTo(4));
}
@Override
public void testFromString() {
assertThat(StringDistanceImpl.resolve("internal"), equalTo(StringDistanceImpl.INTERNAL));
assertThat(StringDistanceImpl.resolve("damerau_levenshtein"), equalTo(StringDistanceImpl.DAMERAU_LEVENSHTEIN));
assertThat(StringDistanceImpl.resolve("levenstein"), equalTo(StringDistanceImpl.LEVENSTEIN));
assertThat(StringDistanceImpl.resolve("jarowinkler"), equalTo(StringDistanceImpl.JAROWINKLER));
assertThat(StringDistanceImpl.resolve("ngram"), equalTo(StringDistanceImpl.NGRAM));
final String doesntExist = "doesnt_exist";
try {
StringDistanceImpl.resolve(doesntExist);
fail("StringDistanceImpl should not have an element " + doesntExist);
} catch (IllegalArgumentException e) {
}
try {
StringDistanceImpl.resolve(null);
fail("StringDistanceImpl.resolve on a null value should throw an exception.");
} catch (NullPointerException e) {
assertThat(e.getMessage(), equalTo("Input string is null"));
}
}
@Override
public void testWriteTo() throws IOException {
assertWriteToStream(StringDistanceImpl.INTERNAL, 0);
assertWriteToStream(StringDistanceImpl.DAMERAU_LEVENSHTEIN, 1);
assertWriteToStream(StringDistanceImpl.LEVENSTEIN, 2);
assertWriteToStream(StringDistanceImpl.JAROWINKLER, 3);
assertWriteToStream(StringDistanceImpl.NGRAM, 4);
}
@Override
public void testReadFrom() throws IOException {
assertReadFromStream(0, StringDistanceImpl.INTERNAL);
assertReadFromStream(1, StringDistanceImpl.DAMERAU_LEVENSHTEIN);
assertReadFromStream(2, StringDistanceImpl.LEVENSTEIN);
assertReadFromStream(3, StringDistanceImpl.JAROWINKLER);
assertReadFromStream(4, StringDistanceImpl.NGRAM);
}
}
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