Maven dependency setup in JUnit - Build an Automation Script

Verify JUnit dependency setup in Maven project

Preconditions (2)

Step 1: Open the project's pom.xml file

Step 2: Add the JUnit 5 dependency inside the <dependencies> tag

Step 3: Save the pom.xml file

Step 4: Run 'mvn clean test' command in the project directory

Step 5: Observe the build and test execution output

✅ Expected Result: Maven downloads the JUnit 5 dependency, compiles the project, and runs tests successfully without errors

Automation Requirements - JUnit 5 with Maven

Assertions Needed:

Verify that the JUnit 5 dependency is present in the pom.xml

Verify that 'mvn test' command runs successfully

Verify that test classes using JUnit 5 annotations execute and pass

Best Practices:

Use the latest stable JUnit 5 version in dependency

Place dependencies inside <dependencies> tag in pom.xml

Use Maven lifecycle commands for build and test

Keep pom.xml well formatted and valid XML

Automated Solution

JUnit

<?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.example</groupId>
    <artifactId>demo-project</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <version>5.10.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.1.2</version>
                <configuration>
                    <useModulePath>false</useModulePath>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

This pom.xml file sets up a Maven project with the JUnit 5 dependency.

The <dependency> tag inside <dependencies> adds JUnit Jupiter version 5.10.0 for testing.

The scope is set to test so JUnit is only used during test phases.

The maven-surefire-plugin is configured to run tests during the Maven test lifecycle phase.

Running mvn clean test downloads dependencies, compiles code, and runs tests using JUnit 5.

This setup ensures tests annotated with JUnit 5 annotations like @Test will execute correctly.

Common Mistakes - 4 Pitfalls

Using an outdated JUnit version in the dependency

Placing the JUnit dependency outside the <dependencies> tag

{'mistake': "Not setting the scope to 'test' for JUnit dependency", 'why_bad': 'JUnit jars will be included in production builds unnecessarily, increasing size', 'correct_approach': 'Set <scope>test</scope> so JUnit is only used during testing'}

Not configuring the surefire plugin or using an incompatible version

Bonus Challenge

Now add data-driven testing with 3 different inputs using JUnit 5 parameterized tests

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