ufo.test.spark.service.WordCountServiceTest.java Source code

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Here is the source code for ufo.test.spark.service.WordCountServiceTest.java

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/*******************************************************************************
 * Copyright 2015 Francesco Cina'
 *
 * 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 ufo.test.spark.service;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Map;

import org.apache.spark.api.java.JavaSparkContext;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import ufo.test.spark.SparkApplicationTests;

public class WordCountServiceTest extends SparkApplicationTests {

    public final static String INPUT_FILE_PATH = "./resources/MotorMattMakesGood.txt";

    @Autowired
    private JavaSparkContext sparkContext;

    @Test
    public void should_count_words_from_file_on_local_fs() {
        Map<String, Integer> wordsCount = WordCountService.wordsCountMap(sparkContext, INPUT_FILE_PATH);
        assertNotNull(wordsCount);
        assertFalse(wordsCount.isEmpty());
    }

    @Test
    public void should_count_words_from_file_on_local_fs_and_save_in_a_file() throws IOException {
        String outputFilePath = "./target/MotorMattMakesGood_count.txt";
        Path outputPath = Paths.get(outputFilePath);
        deleteRecursively(outputPath);
        WordCountService.wordsCountMapToFile(sparkContext, INPUT_FILE_PATH, outputFilePath);
        assertTrue(Files.exists(Paths.get(outputFilePath)));
    }

    @Test
    public void should_return_10_most_used_words() {
        int returnWords = 10;
        Map<String, Integer> wordsCount = WordCountService.getMostUsedWords(sparkContext, INPUT_FILE_PATH,
                returnWords);

        assertEquals(returnWords, wordsCount.size());

        System.out.println("Printing most used words");
        wordsCount.forEach((key, value) -> {
            System.out.println("word [" + key + "] is used " + value + " times");
        });

        assertTrue(wordsCount.containsKey("the"));
        assertTrue(wordsCount.containsKey("a"));

    }

    @Test
    public void should_return_10_longest_words() {
        int returnWords = 10;
        Map<String, Integer> wordsCount = WordCountService.getLongestWords(sparkContext, INPUT_FILE_PATH,
                returnWords);

        assertEquals(returnWords, wordsCount.size());

        System.out.println("Printing most used words");
        wordsCount.forEach((key, value) -> {
            System.out.println("word [" + key + "] is used " + value + " times");
        });

        assertTrue(wordsCount.containsKey("www.gutenberg.org/contact"));

    }

    private void deleteRecursively(Path path) throws IOException {
        if (Files.exists(path)) {
            //delete recursively
            Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                    Files.delete(file);
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                    Files.delete(dir);
                    return FileVisitResult.CONTINUE;
                }
            });
        }
        assertFalse(Files.exists(path));
    }
}