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BAEL-9325 Code and Unit Tests for Guide to RecordBuilder #18653

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BAEL-9325 Code and Unit Tests for Guide to RecordBuilder #18653

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50 changes: 50 additions & 0 deletions libraries-record-builder/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>libraries-record-builder</artifactId>
<packaging>jar</packaging>
<name>libraries-record-builder</name>

<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>

<properties>
<java.version>17</java.version>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>

<dependencies>
<dependency>
<groupId>io.soabase.record-builder</groupId>
<artifactId>record-builder-core</artifactId>
<version>47</version>
</dependency>
</dependencies>

<build>
<finalName>libraries-record-builder</finalName>

<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>io.soabase.record-builder</groupId>
<artifactId>record-builder-processor</artifactId>
<version>47</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
</plugins>
</build>

</project>
6 changes: 6 additions & 0 deletions libraries-record-builder/src/main/java/com/baeldung/recordbuilderguide/Person.java
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package com.baeldung.recordbuilderguide;

import io.soabase.recordbuilder.core.RecordBuilder;

@RecordBuilder
public record Person(String name, int age) implements PersonBuilder.With {}
49 changes: 49 additions & 0 deletions ...aries-record-builder/src/main/java/com/baeldung/recordbuilderguide/RecordBuilderDemo.java
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package com.baeldung.recordbuilderguide;

import java.util.function.Consumer;

public class RecordBuilderDemo {

public static Person createInitialPerson() {
return new Person("foo", 123);
}

public static Person updateName(Person original) {
return original.withName("bar");
}

public static Person updateAge(Person original) {
return original.withAge(456);
}

public static Person updateBothFieldsWithBuilder(Person original) {
return original.with()
.age(101)
.name("baz")
.build();
}

public static Person updateWithConsumer(Person original) {
return original.with(p -> p.age(200).name("whatever"));
}

public static Person updateWithConditionalConsumer(Person original) {
return original.with(p -> {
if (p.age() > 13) {
p.name("Teen " + p.name());
} else {
p.name("whatever");
}
});
}

public static Person updateWithStaticBuilderAndConsumer(Person original) {
return PersonBuilder.from(original)
.with(p -> p.age(300).name("Manual Copy"));
}

public static Person updateWithStaticBuilderAndName(Person original) {
return PersonBuilder.from(original)
.withName("boop");
}
}
97 changes: 97 additions & 0 deletions ...cord-builder/src/test/java/com/baeldung/recordbuilderguide/RecordBuilderDemoUnitTest.java
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package com.baeldung.recordbuilderguide;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class RecordBuilderDemoUnitTest {

@Test
void givenNoInput_whenCreateInitialPerson_thenCorrectFieldsSet() {
Person p1 = RecordBuilderDemo.createInitialPerson();
assertEquals("foo", p1.name());
assertEquals(123, p1.age());
}

@Test
void givenPerson_whenUpdateName_thenNameChangesAndAgeUnchanged() {
Person p1 = RecordBuilderDemo.createInitialPerson();
Person p2 = RecordBuilderDemo.updateName(p1);

assertEquals("bar", p2.name());
assertEquals(123, p2.age());
}

@Test
void givenPerson_whenUpdateAge_thenAgeChangesAndNameUnchanged() {
Person p2 = RecordBuilderDemo.updateName(RecordBuilderDemo.createInitialPerson());
Person p3 = RecordBuilderDemo.updateAge(p2);

assertEquals("bar", p3.name());
assertEquals(456, p3.age());
}

@Test
void givenPerson_whenUpdateBothFieldsWithBuilder_thenBothFieldsChange() {
Person p3 = RecordBuilderDemo.updateAge(
RecordBuilderDemo.updateName(
RecordBuilderDemo.createInitialPerson()));
Person p4 = RecordBuilderDemo.updateBothFieldsWithBuilder(p3);

assertEquals("baz", p4.name());
assertEquals(101, p4.age());
}

@Test
void givenPerson_whenUpdateWithConsumer_thenFieldsChangeCorrectly() {
Person p4 = RecordBuilderDemo.updateBothFieldsWithBuilder(
RecordBuilderDemo.updateAge(
RecordBuilderDemo.updateName(
RecordBuilderDemo.createInitialPerson())));
Person p5 = RecordBuilderDemo.updateWithConsumer(p4);

assertEquals("whatever", p5.name());
assertEquals(200, p5.age());
}

@Test
void givenPerson_whenUpdateWithConditionalConsumer_thenNameIsConditionallySet() {
Person p5 = RecordBuilderDemo.updateWithConsumer(
RecordBuilderDemo.updateBothFieldsWithBuilder(
RecordBuilderDemo.updateAge(
RecordBuilderDemo.updateName(
RecordBuilderDemo.createInitialPerson()))));
Person p6 = RecordBuilderDemo.updateWithConditionalConsumer(p5);

assertEquals("Teen whatever", p6.name());
assertEquals(200, p6.age());
}

@Test
void givenPerson_whenUpdateWithStaticBuilderAndConsumer_thenFieldsAreUpdated() {
Person p6 = RecordBuilderDemo.updateWithConditionalConsumer(
RecordBuilderDemo.updateWithConsumer(
RecordBuilderDemo.updateBothFieldsWithBuilder(
RecordBuilderDemo.updateAge(
RecordBuilderDemo.updateName(
RecordBuilderDemo.createInitialPerson())))));
Person p7 = RecordBuilderDemo.updateWithStaticBuilderAndConsumer(p6);

assertEquals("Manual Copy", p7.name());
assertEquals(300, p7.age());
}

@Test
void givenPerson_whenUpdateWithStaticBuilderAndName_thenOnlyNameChanges() {
Person p6 = RecordBuilderDemo.updateWithConditionalConsumer(
RecordBuilderDemo.updateWithConsumer(
RecordBuilderDemo.updateBothFieldsWithBuilder(
RecordBuilderDemo.updateAge(
RecordBuilderDemo.updateName(
RecordBuilderDemo.createInitialPerson())))));
Person p8 = RecordBuilderDemo.updateWithStaticBuilderAndName(p6);

assertEquals("boop", p8.name());
assertEquals(200, p8.age());
}
}