38 lines
1.1 KiB
Java
38 lines
1.1 KiB
Java
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package com.baeldung.autovalue;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import java.util.ArrayList;
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import java.util.List;
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import org.junit.Test;
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/**
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* Unit Test which verifies that the {@link Person} value object creates defensive copies of its favoriteMovies list.
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*/
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public class PersonUnitTest {
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@Test
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public void givenNewPerson_whenModifyOriginalList_thenValueObjectIsNotAlsoModified() {
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// GIVEN new Person
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List<String> originalFavoriteMoviesList = new ArrayList<String>();
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originalFavoriteMoviesList.add("Training Day");
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originalFavoriteMoviesList.add("Fast and the Furious");
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Person person = Person.builder()
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.name("Dan")
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.favoriteMovies(originalFavoriteMoviesList)
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.build();
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// WHEN modify original list
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originalFavoriteMoviesList.add("Friday");
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// THEN Person remains unaffected
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assertFalse(person.favoriteMovies()
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.contains("Friday"));
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assertEquals(2, person.favoriteMovies()
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.size());
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}
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}
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