BAEL-1787 - Use Lombok @Builder Annotation (#4302)
* BAEL-1787 - using Lombok @Builder on methods * BAEL-1787 - rename class. Add AssertJ to Lombok project. * BAEL-1787 - rename class again. Change AssertJ tests. * BAEL-1787 - add Builder directory. Move method cocde to that package. Add code for using builder with a class.
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package com.baeldung.lombok.builder;
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import lombok.Builder;
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class ClientBuilder {
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@Builder(builderMethodName = "builder")
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public static ImmutableClient newClient(int id, String name) {
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return new ImmutableClient(id, name);
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}
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}
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package com.baeldung.lombok.builder;
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import lombok.Value;
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@Value
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final class ImmutableClient {
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private int id;
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private String name;
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}
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package com.baeldung.lombok.builder;
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import lombok.Builder;
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import lombok.Getter;
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@Getter
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@Builder(toBuilder = true)
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public class Widget {
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private final String name;
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private final int id;
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}
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package com.baeldung.lombok.builder;
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import org.junit.jupiter.api.Test;
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import static org.assertj.core.api.Assertions.*;
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public class BuilderUnitTest
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{
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@Test
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public void givenBuilder_WidgetIsBuilt() {
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Widget testWidget = Widget.builder().name("foo").id(1).build();
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assertThat(testWidget.getName())
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.isEqualTo("foo");
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assertThat(testWidget.getId())
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.isEqualTo(1);
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}
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@Test
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public void givenToBuilder_whenToBuilder_BuilderIsCreated() {
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Widget testWidget = Widget.builder().name("foo").id(1).build();
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Widget.WidgetBuilder widgetBuilder = testWidget.toBuilder();
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Widget newWidget = widgetBuilder.id(2).build();
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assertThat(newWidget.getName())
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.isEqualTo("foo");
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assertThat(newWidget.getId())
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.isEqualTo(2);
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}
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@Test
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public void givenBuilderMethod_ClientIsBuilt() {
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ImmutableClient testImmutableClient = ClientBuilder.builder().name("foo").id(1).build();
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assertThat(testImmutableClient.getName())
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.isEqualTo("foo");
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assertThat(testImmutableClient.getId())
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.isEqualTo(1);
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}
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}
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