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thombergsthombergs
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added object mother with fluent builder example
1 parent a9c9fab commit 52bc347

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‎patterns/build.gradle‎

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buildscript {
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repositories {
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jcenter()
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}
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}
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apply plugin: 'java'
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version = '0.0.1-SNAPSHOT'
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sourceCompatibility = 1.8
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repositories {
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mavenLocal()
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mavenCentral()
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}
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dependencies {
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compileOnly 'org.projectlombok:lombok:1.18.2'
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testCompile 'org.junit.jupiter:junit-jupiter-engine:5.0.1'
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testCompile 'org.assertj:assertj-core:2.6.0'
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}
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‎patterns/src/main/java/io/reflectoring/objectmother/Address.java‎

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package io.reflectoring.objectmother;
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import lombok.Builder;
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import lombok.Data;
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@Data
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@Builder
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class Address {
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private String street;
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private String houseNumber;
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private String zipCode;
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private String city;
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private String country;
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}

‎patterns/src/main/java/io/reflectoring/objectmother/Invoice.java‎

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package io.reflectoring.objectmother;
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import java.util.List;
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import lombok.Builder;
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import lombok.Data;
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@Data
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@Builder
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class Invoice {
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private long id;
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private Address address;
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private List<InvoiceItem> items;
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}

‎patterns/src/main/java/io/reflectoring/objectmother/InvoiceItem.java‎

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package io.reflectoring.objectmother;
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import lombok.Builder;
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import lombok.Data;
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@Data
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@Builder
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class InvoiceItem {
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private long amount;
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private long price;
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private String productName;
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private double taxFactor;
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}

‎patterns/src/test/java/io/reflectoring/objectmother/AddressMother.java‎

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package io.reflectoring.objectmother;
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class AddressMother {
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static Address.AddressBuilder complete() {
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return Address.builder()
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.street("Hollywood Boulevard")
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.houseNumber("4711")
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.zipCode("90210")
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.country("US")
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.city("Los Angeles");
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}
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static Address.AddressBuilder abroad() {
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return complete()
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.country("DE");
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}
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}

‎patterns/src/test/java/io/reflectoring/objectmother/InvoiceItemMother.java‎

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package io.reflectoring.objectmother;
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class InvoiceItemMother {
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static InvoiceItem.InvoiceItemBuilder complete() {
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return InvoiceItem.builder()
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.amount(1)
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.price(1234L)
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.productName("The Hitchhiker's Guide to the Galaxy")
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.taxFactor(0.19d);
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}
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static InvoiceItem.InvoiceItemBuilder withNegativePrice() {
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return InvoiceItem.builder()
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.amount(1)
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.price(-1234L)
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.productName("The Hitchhiker's Guide to the Galaxy")
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.taxFactor(0.19d);
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}
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}

‎patterns/src/test/java/io/reflectoring/objectmother/InvoiceMother.java‎

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package io.reflectoring.objectmother;
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import java.util.Collections;
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class InvoiceMother {
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static Invoice.InvoiceBuilder complete() {
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return Invoice.builder()
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.id(42L)
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.address(AddressMother.complete()
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.build())
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.items(Collections.singletonList(
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InvoiceItemMother.complete()
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.build()));
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}
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static Invoice.InvoiceBuilder refund() {
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return Invoice.builder()
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.id(42L)
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.address(AddressMother.complete()
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.build())
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.items(Collections.singletonList(
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InvoiceItemMother.withNegativePrice()
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.build()));
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}
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}

‎patterns/src/test/java/io/reflectoring/objectmother/ObjectMotherClient.java‎

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package io.reflectoring.objectmother;
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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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class ObjectMotherClient {
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@Test
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void invoiceWithAbroadAddress() {
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Invoice invoice = InvoiceMother.complete()
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.address(AddressMother.abroad()
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.build())
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.build();
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assertThat(invoice.getAddress().getCountry()).isEqualTo("DE");
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}
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@Test
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void invoiceWithMissingHouseNumber() {
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Invoice invoice = InvoiceMother.complete()
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.address(AddressMother.complete()
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.houseNumber(null)
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.build())
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.build();
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assertThat(invoice.getAddress().getHouseNumber()).isNull();
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}
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@Test
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void invoiceWithNegativeTotal() {
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Invoice invoice = InvoiceMother.refund()
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.build();
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double sum = invoice.getItems().stream()
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.mapToDouble(item -> item.getAmount() * item.getPrice())
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.sum();
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assertThat(sum).isNegative();
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}
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}

‎settings.gradle‎

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include 'junit:conditions'
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include 'patterns'
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