Fork me on GitHub
Built by Maven

Using Java Modularity (JPMS) in Tests

Examples using TestNG

The Surefire project provides the integration tests with TestNG demonstrating the Java Modularity (JPMS).

The JDK version must be 9 or higher. The POM contains the dependency org.testng:testng:7.1.0 which is an automatic module. It activates the internal provider surefire-testng in the plugin. The frameworks with assertions API are used, i.e. org.hamcrest:hamcrest:2.2 (automatic module) and org.assertj:assertj-core:3.16.1 (named module).

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.release>${java.specification.version}</maven.compiler.release>
</properties>

<dependencies>
    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>7.1.0</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest</artifactId>
        <version>2.2</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.assertj</groupId>
        <artifactId>assertj-core</artifactId>
        <version>3.16.1</version>
        <scope>test</scope>
    </dependency>
</dependencies>

The most important parts are the module descriptors. This is the module descriptor located in src/main/java:

module main
{
    exports main;
}

This is the module descriptor in src/test/java:

module test
{
    requires main;
    requires org.testng;
    requires org.hamcrest;
    requires org.assertj.core;
    exports test to org.testng;
}

Examples using JUnit4

The Surefire project provides the integration tests with JUnit4 demonstrating the Java Modularity (JPMS).

The JDK version must be 9 or higher. The POM contains the dependency junit:junit:4.13 which is an automatic module. It activates the internal provider surefire-junit4 or surefire-junit47 in the plugin.

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.release>${java.specification.version}</maven.compiler.release>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13.2</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.hamcrest</groupId>
                <artifactId>hamcrest-core</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest</artifactId>
        <version>2.2</version>
        <scope>test</scope>
    </dependency>
</dependencies>

The most important parts are the module descriptors. This is the module descriptor located in src/main/java:

module main
{
    exports main;
}

This is the module descriptor in src/test/java:

module test
{
    requires main;
    requires junit;
    requires org.hamcrest;
    exports test to junit;
}

Examples using JUnit5

The Surefire project provides the integration tests with JUnit5 demonstrating the Java Modularity (JPMS) in Maven multi-module project.

The JDK version must be 9 or higher. The POM contains the dependency org.junit.jupiter:junit-jupiter-engine:5.9.1 which is named module. It activates the internal provider surefire-junit-platform in the plugin.

<artifactId>com.foo.impl</artifactId>

<dependencies>
    <dependency>
        <groupId>com.foo</groupId>
        <artifactId>com.foo.api</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

The most important parts are the module descriptors. This is the module descriptor located in src/main/java:

module com.foo.impl
{
    exports com.foo.impl;
    requires com.foo.api;
    requires org.slf4j;
    requires org.slf4j.simple;
}

This is the module descriptor in src/test/java:

open module com.foo.test
{
    exports com.foo.implt;
    requires com.foo.impl;
    requires org.slf4j;
    requires org.slf4j.simple;
    requires transitive org.junit.jupiter.engine;
    requires transitive org.junit.jupiter.api;
}