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MessageUtil.java
public class MessageUtil {
private String message;

public MessageUtil(String message) {
this.message = message;
}

public String printMessage() {
System.out.println(message);
return message;
}

public String salutationMessage() {
message = "Hi!" + message;
System.out.println(message);
return message;
}
}

TestMessageUtil.java
import org.junit.Test;
import org.junit.Ignore;
import static org.junit.Assert.assertEquals;

public class TestMessageUtil {

String message = "Niraj";
MessageUtil messageUtil = new MessageUtil(message);

@Test
public void testPrintMessage() {
System.out.println("Inside testPrintMessage()");
assertEquals(message,messageUtil.printMessage());
}

@Test
public void testSalutationMessage() {
System.out.println("Inside testSalutationMessage()");
message = "Hi!" + "Niraj";
assertEquals(message,messageUtil.salutationMessage());
}
}

pom.xml
﹤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/maven-v4_0_0.xsd"&gt
&ltmodelVersion&gt4.0.0&lt/modelVersion&gt
&ltgroupId&gtorg.example&lt/groupId&gt
&ltartifactId&gtmessageUtil&lt/artifactId&gt
&ltversion&gt1.0&lt/version&gt
&ltpackaging&gtjar&lt/packaging&gt
&ltname&gtMessage Utility Java Sample App&lt/name&gt
&ltdependencies&gt
&ltdependency&gt
&ltgroupId&gtjunit&lt/groupId&gt
&ltartifactId&gtjunit&lt/artifactId&gt
&ltversion&gt4.11&lt/version&gt
&ltscope&gttest&lt/scope&gt
&lt/dependency&gt
&lt/dependencies&gt
&ltbuild&gt
&ltplugins&gt
&ltplugin&gt
&ltgroupId&gtorg.apache.maven.plugins&lt/groupId&gt
&ltartifactId&gtmaven-compiler-plugin&lt/artifactId&gt
&ltversion&gt3.8.0&lt/version&gt
&lt/plugin&gt
&lt/plugins&gt
&lt/build&gt
&lt/project&gt

buildspecs.yml
version: 0.2

phases:
install:
runtime-versions:
java: corretto11
pre_build:
commands:
- echo Nothing to do in the pre_build phase...
build:
commands:
- echo Build started on `date`
- mvn install
post_build:
commands:
- echo Build completed on `date`
artifacts:
files:
- target/messageUtil-1.0.jar