#919 Explicit setup for Mockito inline mocking

Author: mrotteveel

build.gradle

@@ -85,6 +85,12 @@ java {
     }
 }
 
+configurations {
+    if (project.testJava > 8) {
+        mockitoAgent
+    }
+}
+
 ext {
     // Do not upgrade to JUnit 6 as it requires Java 17
     junit_jupiter = '5.14.3'
@@ -114,6 +120,10 @@ dependencies {
     testImplementation "org.mockito:mockito-core:$mockito"
     if (project.testJava == 8) {
         testImplementation "org.mockito:mockito-inline:$mockito"
+    } else {
+        mockitoAgent("org.mockito:mockito-core:$mockito") {
+            transitive = false
+        }
     }
     testImplementation "org.mockito:mockito-junit-jupiter:$mockito"
 }
@@ -249,6 +259,13 @@ test {
     println "Running tests for type ${project.'test.gds_type'}"
     // Use junit platform for unit tests
     useJUnitPlatform()
+    if (project.testJava > 8) {
+        jvmArgumentProviders.add(
+                objects.newInstance(JavaAgentProvider).tap {
+                    agent = configurations.mockitoAgent.asPath
+                }
+        )
+    }
 
     // Test configuration, defaults specified in gradle.properties (modify through ext, or use -P<prop>=<value>)
     systemProperties(

buildSrc/build.gradle

@@ -0,0 +1,9 @@
+// SPDX-FileCopyrightText: Copyright 2026 Mark Rotteveel
+// SPDX-License-Identifier: LGPL-2.1-or-later
+plugins {
+    id 'groovy-gradle-plugin'
+}
+
+repositories {
+    gradlePluginPortal()
+}

buildSrc/src/main/groovy/build-helpers.gradle

@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: Copyright 2026 Mark Rotteveel
+// SPDX-License-Identifier: LGPL-2.1-or-later
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.PathSensitive
+import org.gradle.api.tasks.PathSensitivity
+import org.gradle.process.CommandLineArgumentProvider
+
+/**
+ * Provider for {@code -javaagent:some.jar} command line arguments.
+ */
+abstract class JavaAgentProvider implements CommandLineArgumentProvider {
+
+    @InputFile
+    @PathSensitive(PathSensitivity.RELATIVE)
+    abstract Property<String> getAgent()
+
+    @Override
+    Iterable<String> asArguments() {
+        ["-javaagent:${agent.get()}"]
+    }
+
+}