/**
* Copyright 2013-2015 Pierre Merienne
*
* Licensed 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 com.github.pmerienne.trident.ml.preprocessing;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import com.github.pmerienne.trident.ml.preprocessing.TwitterTokenizer;
public class TwitterTokenizerTest {
@Test
public void testRemoveUsername() {
// Given
String tweet = "@PrincessSuperC Hey Cici";
TwitterTokenizer tokenizer = new TwitterTokenizer();
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("hei", "cici");
assertEquals(expectedTokens, actualTokens);
}
@Test
public void testRemoveHashTagIndicator() {
// Given
String tweet = "arg #word!";
TwitterTokenizer tokenizer = new TwitterTokenizer();
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("arg", "word");
assertEquals(expectedTokens, actualTokens);
}
@Test
public void testRemoveCharacterRepetitions() {
// Given
String tweet = "so huuunggryy!";
TwitterTokenizer tokenizer = new TwitterTokenizer();
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("so", "hungri");
assertEquals(expectedTokens, actualTokens);
}
@Test
public void testRemoveWordsStartingNumber() {
// Given
String tweet = "it's 15PM we're in the 20th century";
TwitterTokenizer tokenizer = new TwitterTokenizer();
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("we'r", "centuri");
assertEquals(expectedTokens, actualTokens);
}
@Test
public void testRemoveHTMLMarkum() {
// Given
String tweet = "fb > tw";
TwitterTokenizer tokenizer = new TwitterTokenizer();
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("fb", "tw");
assertEquals(expectedTokens, actualTokens);
}
@Test
public void testWithNGram() {
// Given
String tweet = "it's not bad movie";
TwitterTokenizer tokenizer = new TwitterTokenizer(2, 2);
// When
List<String> actualTokens = tokenizer.tokenize(tweet);
// Then
List<String> expectedTokens = Arrays.asList("_ bad", "bad", "bad movi", "movi");
assertEquals(expectedTokens, actualTokens);
}
}