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BAEL-3951: Added JDK 14 record example and associated tests.
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  • core-java-modules/core-java-14/src

‎core-java-modules/core-java-14/src/main/java/com/baeldung/java14/record/Person.java‎

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package com.baeldung.java14.record;
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import java.util.Objects;
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public record Person (String name, String address) {
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public static String UNKWOWN_ADDRESS = "Unknown";
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public static String UNNAMED = "Unnamed";
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public Person {
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Objects.requireNonNull(name);
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Objects.requireNonNull(address);
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}
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public Person(String name) {
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this(name, UNKWOWN_ADDRESS);
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}
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public static Person unnamed(String address) {
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return new Person(UNNAMED, address);
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}
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}

‎core-java-modules/core-java-14/src/test/java/com/baeldung/java14/record/PersonTest.java‎

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package com.baeldung.java14.record;
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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 static org.junit.Assert.assertNotEquals;
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import static org.junit.Assert.assertTrue;
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import org.junit.Test;
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public class PersonTest {
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@Test
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public void givenSameNameAndAddress_whenEquals_thenPersonsEqual() {
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String name = "John Doe";
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String address = "100 Linda Ln.";
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Person person1 = new Person(name, address);
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Person person2 = new Person(name, address);
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assertTrue(person1.equals(person2));
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}
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@Test
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public void givenDifferentObject_whenEquals_thenNotEqual() {
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Person person = new Person("John Doe", "100 Linda Ln.");
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assertFalse(person.equals(new Object()));
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}
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@Test
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public void givenDifferentName_whenEquals_thenPersonsNotEqual() {
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String address = "100 Linda Ln.";
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Person person1 = new Person("Jane Doe", address);
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Person person2 = new Person("John Doe", address);
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assertFalse(person1.equals(person2));
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}
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@Test
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public void givenDifferentAddress_whenEquals_thenPersonsNotEqual() {
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String name = "John Doe";
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Person person1 = new Person(name, "100 Linda Ln.");
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Person person2 = new Person(name, "200 London Ave.");
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assertFalse(person1.equals(person2));
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}
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@Test
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public void givenSameNameAndAddress_whenHashCode_thenPersonsEqual() {
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String name = "John Doe";
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String address = "100 Linda Ln.";
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Person person1 = new Person(name, address);
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Person person2 = new Person(name, address);
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assertEquals(person1.hashCode(), person2.hashCode());
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}
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@Test
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public void givenDifferentObject_whenHashCode_thenNotEqual() {
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Person person = new Person("John Doe", "100 Linda Ln.");
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assertNotEquals(person.hashCode(), new Object().hashCode());
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}
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@Test
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public void givenDifferentName_whenHashCode_thenPersonsNotEqual() {
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String address = "100 Linda Ln.";
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Person person1 = new Person("Jane Doe", address);
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Person person2 = new Person("John Doe", address);
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assertNotEquals(person1.hashCode(), person2.hashCode());
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}
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@Test
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public void givenDifferentAddress_whenHashCode_thenPersonsNotEqual() {
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String name = "John Doe";
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Person person1 = new Person(name, "100 Linda Ln.");
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Person person2 = new Person(name, "200 London Ave.");
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assertNotEquals(person1.hashCode(), person2.hashCode());
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}
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@Test
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public void givenValidNameAndAddress_whenGetNameAndAddress_thenExpectedValuesReturned() {
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String name = "John Doe";
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String address = "100 Linda Ln.";
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Person person = new Person(name, address);
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assertEquals(name, person.name());
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assertEquals(address, person.address());
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}
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@Test
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public void givenValidNameAndAddress_whenToString_thenCorrectStringReturned() {
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String name = "John Doe";
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String address = "100 Linda Ln.";
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Person person = new Person(name, address);
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assertEquals("Person[name=" + name + ", address=" + address + "]", person.toString());
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}
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@Test(expected = NullPointerException.class)
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public void givenNullName_whenConstruct_thenErrorThrown() {
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new Person(null, "100 Linda Ln.");
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}
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@Test(expected = NullPointerException.class)
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public void givenNullAddress_whenConstruct_thenErrorThrown() {
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new Person("John Doe", null);
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}
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@Test
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public void givenUnknownAddress_whenConstructing_thenAddressPopulated() {
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String name = "John Doe";
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Person person = new Person(name);
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assertEquals(name, person.name());
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assertEquals(Person.UNKWOWN_ADDRESS, person.address());
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}
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@Test
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public void givenUnnamed_whenConstructingThroughFactory_thenNamePopulated() {
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String address = "100 Linda Ln.";
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Person person = Person.unnamed(address);
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assertEquals(Person.UNNAMED, person.name());
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assertEquals(address, person.address());
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}
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}

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