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Design Patterns in Java

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Javadevjournal
2021-12-06 21:39:37 -08:00
parent 1b940d44bb
commit d95980639f
20 changed files with 526 additions and 16 deletions
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80
design-patterns/pom.xml Normal file
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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>
<groupId>com.javadevjournal</groupId>
<artifactId>design-patterns</artifactId>
<version>1.0-SNAPSHOT</version>
<name>design-patterns</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>4.1.0</version>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

5
design-patterns/src/main/java/com/javadevjournal/designpatterns/factory/account/BankAccount.java Normal file
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package com.javadevjournal.designpatterns.factory.account;
public interface BankAccount {
void registerAccount();
}

8
design-patterns/src/main/java/com/javadevjournal/designpatterns/factory/account/BusinessAccount.java Normal file
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package com.javadevjournal.designpatterns.factory.account;
public class BusinessAccount implements BankAccount {
@Override
public void registerAccount() {
System.out.println("Creating a business account");
}
}

8
design-patterns/src/main/java/com/javadevjournal/designpatterns/factory/account/CheckingAccount.java Normal file
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package com.javadevjournal.designpatterns.factory.account;
public class CheckingAccount implements BankAccount{
@Override
public void registerAccount() {
System.out.println("Creating a checking account");
}
}

8
design-patterns/src/main/java/com/javadevjournal/designpatterns/factory/account/PersonalAccount.java Normal file
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package com.javadevjournal.designpatterns.factory.account;
public class PersonalAccount implements BankAccount{
@Override
public void registerAccount() {
System.out.println("Creating a personal account");
}
}

48
design-patterns/src/test/java/com/javadevjournal/designpatterns/factory/FactoryDesignPatternTest.java Normal file
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package com.javadevjournal.designpatterns.factory;
import com.javadevjournal.designpatterns.factory.account.BankAccount;
import com.javadevjournal.designpatterns.factory.account.BusinessAccount;
import com.javadevjournal.designpatterns.factory.account.CheckingAccount;
import com.javadevjournal.designpatterns.factory.account.PersonalAccount;
import org.junit.Before;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
public class FactoryDesignPatternTest {
private BankAccountFactory factory;
@Before
public void setUp() {
factory = new BankAccountFactory();
}
@Test
public void testPersonalAccount(){
BankAccount account = factory.createAccount("P");
assertThat(account, instanceOf(PersonalAccount.class));
}
@Test
public void testBusinessAccount(){
BankAccount account = factory.createAccount("B");
assertThat(account, instanceOf(BusinessAccount.class));
}
@Test
public void testCheckingAccount(){
BankAccount account = factory.createAccount("C");
assertThat(account, instanceOf(CheckingAccount.class));
}
@Test
public void testValidAccountType(){
BankAccount account = factory.createAccount("X");
assertNull(account);
}
}