Add junit-platform-launcher to runtime classpath

Author: mannodermaus

build-logic/src/main/kotlin/Tasks.kt

@@ -166,6 +166,10 @@ fun Copy.configureCreateVersionClassTask(
                 // Find an appropriate version of the instrumentation library,
                 // depending on the version of how the plugin is configured
                 "INSTRUMENTATION_VERSION" to instrumentationVersion,
+
+                // JUnit 5.12+ requires the platform launcher on the runtime classpath;
+                // to prevent issues with version mismatching, the plugin applies this for users
+                "JUNIT_PLATFORM_LAUNCHER" to libs.junitPlatformLauncher
             )
         ), ReplaceTokens::class.java
     )

plugin/CHANGELOG.md

@@ -3,6 +3,7 @@ Change Log
 
 ## Unreleased
 - JUnit 5.12.0
+- Add dependency on JUnit Platform Launcher to runtime classpath, accommodating an upstream change
 
 ## 1.11.3.0 (2024-12-23)
 - JUnit 5.11.3

plugin/android-junit5/src/main/kotlin/de/mannodermaus/gradle/plugins/junit5/internal/configureJUnit5.kt

@@ -148,13 +148,15 @@ private fun AndroidJUnitPlatformExtension.attachDependencies(
     includeRunner: Boolean,
 ) {
     if (project.usesJUnitJupiterIn(configurationName)) {
+        val runtimeOnlyConfigurationName = configurationName.replace("Implementation", "RuntimeOnly")
         val version = instrumentationTests.version.get()
 
+        project.dependencies.add(runtimeOnlyConfigurationName, Libraries.junitPlatformLauncher)
         project.dependencies.add(configurationName, "${Libraries.instrumentationCore}:$version")
 
         if (includeRunner) {
             project.dependencies.add(
-                configurationName.replace("Implementation", "RuntimeOnly"),
+                runtimeOnlyConfigurationName,
                 "${Libraries.instrumentationRunner}:$version",
             )
         }

plugin/android-junit5/src/main/templates/Libraries.kt

@@ -6,4 +6,6 @@ internal object Libraries {
     const val instrumentationCore = "@INSTRUMENTATION_GROUP@:@INSTRUMENTATION_CORE@"
     const val instrumentationExtensions = "@INSTRUMENTATION_GROUP@:@INSTRUMENTATION_EXTENSIONS@"
     const val instrumentationRunner = "@INSTRUMENTATION_GROUP@:@INSTRUMENTATION_RUNNER@"
+
+    const val junitPlatformLauncher = "@JUNIT_PLATFORM_LAUNCHER@"
 }