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33 - Classpath and Module Path in Testing
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‎32_Artifact_Transforms/README.MD

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# Understanding Gradle #32 – Artifact Transforms (Java Modularity Part 6)
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# Understanding Gradle #32 – Artifact Transforms (Java Modularity Part 7)
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**👇 click thumbnail to watch video**
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‎33_Classpath_and_Module_Path_in_Testing/README.MD

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# Understanding Gradle #33 – Classpath and Module Path in Testing (Java Modularity Part 8)
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**👇 click thumbnail to watch video**
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[<img src="https://onepiecesoftware.github.io/img/videos/33.png" width="640">](https://www.youtube.com/watch?v=6rFEDcP8Noc&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)
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How does modularity in Java work (Part 8): How are classpath and module path concepts used in testing?
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## Explore this sample
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This sample is best explored in [IntelliJ IDEA](https://www.jetbrains.com/idea/download).
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Open **`33_Classpath_and_Module_Path_in_Testing/my-project`** in IDEA and confirm with _Trust Project_.
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## Further readings
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* [Testing Java Modules](https://docs.gradle.org/current/userguide/java_testing.html#sec:java_testing_modular)
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* [Source Sets added by the Java Plugin](https://docs.gradle.org/current/userguide/java_plugin.html#source_sets)
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* [Testing in Java & JVM projects](https://docs.gradle.org/current/userguide/java_testing.html)
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* [Configurations added by the Java Library Plugin](https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_configurations_graph)
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* [JVM Test Suite plugin](https://docs.gradle.org/current/userguide/jvm_test_suite_plugin.html)
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* [Java Module Testing plugin](https://github.com/gradlex-org/java-module-testing)
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## Need Gradle support?
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Contact me, if you need help with Gradle: [onepiece.Software](https://onepiece.software).

‎33_Classpath_and_Module_Path_in_Testing/my-build-logic/java-plugins/build.gradle.kts

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plugins {
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`kotlin-dsl`
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}
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dependencies {
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implementation("io.fuchs.gradle.classpath-collision-detector:classpath-collision-detector:0.3")
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implementation("org.gradlex:java-ecosystem-capabilities:1.2")
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implementation("org.gradlex:java-module-testing:1.1")
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}

‎33_Classpath_and_Module_Path_in_Testing/my-build-logic/java-plugins/src/main/kotlin/my-java-application.gradle.kts

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plugins {
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id("my-java-base")
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id("application")
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}
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‎33_Classpath_and_Module_Path_in_Testing/my-build-logic/java-plugins/src/main/kotlin/my-java-base.gradle.kts

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plugins {
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id("java")
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id("java-test-fixtures")
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id("org.gradlex.java-module-testing")
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}
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group = "org.example"
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java {
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toolchain.languageVersion.set(JavaLanguageVersion.of(17))
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}
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javaModuleTesting.whitebox(testing.suites.getByName("test")) {
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requires.add("org.junit.jupiter.api")
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opensTo.add("org.junit.platform.commons")
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}
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tasks.test {
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useJUnitPlatform() // JUnit5
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}

‎33_Classpath_and_Module_Path_in_Testing/my-build-logic/java-plugins/src/main/kotlin/my-java-library.gradle.kts

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plugins {
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id("my-java-base")
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id("java-library")
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}

‎33_Classpath_and_Module_Path_in_Testing/my-build-logic/settings.gradle.kts

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dependencyResolutionManagement {
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repositories.gradlePluginPortal()
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}
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include("java-plugins")

‎33_Classpath_and_Module_Path_in_Testing/my-project/app/build.gradle.kts

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plugins {
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id("my-java-application")
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}
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application {
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mainModule.set("org.example.app")
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mainClass.set("org.example.app.App")
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}
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dependencies {
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implementation("org.apache.commons:commons-lang3:3.6")
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testImplementation("org.apache.commons:commons-text:1.5")
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testImplementation("org.junit.jupiter:junit-jupiter-api:5.9.3")
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testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
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}

‎33_Classpath_and_Module_Path_in_Testing/my-project/app/src/main/java/module-info.java

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module org.example.app {
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requires org.apache.commons.lang3;
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exports org.example.app;
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}

‎33_Classpath_and_Module_Path_in_Testing/my-project/app/src/main/java/org/example/app/App.java

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package org.example.app;
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public class App {
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public static void main(String[] args) {
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printModuleName();
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}
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protected static void printModuleName() {
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System.out.println("Production Module: " +
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App.class.getModule().getName());
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}
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}
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‎33_Classpath_and_Module_Path_in_Testing/my-project/app/src/test/java/org/example/app/AppTest.java

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package org.example.app;
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import org.junit.jupiter.api.Test;
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import java.io.IOException;
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import static java.nio.charset.StandardCharsets.UTF_8;
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class AppTest {
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@Test
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void testAppModule() throws IOException {
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App.printModuleName();
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System.out.println("Test Module: " +
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AppTest.class.getModule().getName());
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System.out.println(
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new String(AppTest.class.getResourceAsStream("/test-data.txt")
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.readAllBytes(), UTF_8));
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}
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}

‎33_Classpath_and_Module_Path_in_Testing/my-project/app/src/test/resources/test-data.txt

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__ __ __ __ ___ ______ ____
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/ / / /___ ____/ /__ __________/ /_____ _____ ____/ (_)___ ____ _ / ____/________ _____/ / /__
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/ / / / __ \/ __ / _ \/ ___/ ___/ __/ __ `/ __ \/ __ / / __ \/ __ `/ / / __/ ___/ __ `/ __ / / _ \
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/ /_/ / / / / /_/ / __/ / (__ ) /_/ /_/ / / / / /_/ / / / / / /_/ / / /_/ / / / /_/ / /_/ / / __/
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\____/_/ /_/\__,_/\___/_/ /____/\__/\__,_/_/ /_/\__,_/_/_/ /_/\__, / \____/_/ \__,_/\__,_/_/\___/
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/____/

‎33_Classpath_and_Module_Path_in_Testing/my-project/settings.gradle.kts

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// Locations of Gradle plugins
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pluginManagement {
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repositories.gradlePluginPortal()
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includeBuild("../my-build-logic")
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}
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// Location of other components
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dependencyResolutionManagement {
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repositories.mavenCentral()
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}
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include("app")

‎README.MD

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- [Full Android Project Setup](https://github.com/jjohannes/gradle-project-setup-howto/tree/android)
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- [Full Java Module System Project Setup](https://github.com/jjohannes/gradle-project-setup-howto/tree/java_module_system)
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## JVM Development Basics (Entry 16 - 22)
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## JVM Development Basics (Entries 16 - 22)
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16. [Source Sets](16_Source_Sets)
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17. [Feature Variants](17_Feature_Variants)
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21. [Test and Code Coverage Reporting](21_Test_and_Code_Coverage_Reporting)
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22. [The JavaCompile Task](22_The_JavaCompile_Task)
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## General Gradle Topics (Entry 23 - 25)
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## General Gradle Topics (Entries 23 - 25)
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23. [Caching](23_Caching)
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24. [Kotlin DSL and Groovy DSL](24_Kotlin_DSL_and_Groovy_DSL)
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25. [Using Java to configure builds](25_Using_Java_to_configure_builds)
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## Java Modularity (Entry 26 - ??)
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## Java Modularity (Entries 26 - 33)
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26. [The Classpath](26_The_Classpath)
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27. [Multiple Compile Classpaths](27_Multiple_Compile_Classpaths)
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30. [Discover Security Vulnerabilities](30_Security_Vulnerabilities)
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31. [The Module Path](31_The_Module_Path)
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32. [Artifact Transforms](32_Artifact_Transforms)
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33. [Classpath and Module Path in Testing](33_Classpath_and_Module_Path_in_Testing)
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## Need Gradle support?
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