RegexHashtagExtractorTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.streams.regex;

import org.apache.streams.core.StreamsDatum;
import org.apache.streams.pojo.extensions.ExtensionUtil;
import org.apache.streams.pojo.json.Activity;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

@RunWith(Parameterized.class)
public class RegexHashtagExtractorTest {

    private Activity activity;
    private Set<String> hashtags;

    public RegexHashtagExtractorTest(String activityContent, Set<String> hashtags) {
        this.activity = new Activity();
        this.activity.setContent(activityContent);
        this.hashtags = hashtags;
    }

    @Parameterized.Parameters
    public static Collection<Object[]> params() {
        return Arrays.asList(new Object[][]{
                {"This is the #content of a standard tweet", Stream.of("content").collect(Collectors.toSet())},
                {"This is the content of a standard tweet", new HashSet<>()},
                {"This is the #content of a standard #tweet", Stream.of("content", "tweet").collect(Collectors.toSet())},
                {"UNIX 时间1400000000 秒…… （该睡觉了，各位夜猫子）#程序员#", Stream.of("程序员").collect(Collectors.toSet())},
                {"This is the body of a #fbpost. It can have multiple lines of #content, as well as much more detailed and flowery #language.",
                    Stream.of("content", "fbpost", "language").collect(Collectors.toSet())}
        });
    }

    @Test
    @SuppressWarnings("unchecked")
    public void testExtraction() {
        StreamsDatum datum = new StreamsDatum(activity, "Test");
        List<StreamsDatum> result = new RegexHashtagExtractor().process(datum);
        assertThat(result.size(), is(equalTo(1)));
        Activity output = (Activity)result.get(0).getDocument();
        Set<String> extracted = (Set) ExtensionUtil.getInstance().ensureExtensions(output).get(RegexHashtagExtractor.EXTENSION_KEY);
        Set<String> diff = extracted.stream().filter((x) -> !hashtags.contains(x)).collect(Collectors.toSet());
        assertThat(diff.size(), is(equalTo(0)));
    }
}