#919 Explicit setup for Mockito inline mocking

Author: mrotteveel

build.gradle

@@ -74,6 +74,7 @@ java {
 
 configurations {
     asciidoctorExt
+    mockitoAgent
 }
 
 dependencies {
@@ -89,6 +90,10 @@ dependencies {
 
     testImplementation platform(testLibs.mockito.bom)
     testImplementation testLibs.bundles.mockito
+    mockitoAgent platform(testLibs.mockito.bom)
+    mockitoAgent(testLibs.mockito.core) {
+        transitive = false
+    }
 
     testImplementation testLibs.awaitility
     // A lot (if not all) tests for jaybird-native are in the main project given dependencies on test infrastructure
@@ -212,6 +217,11 @@ test {
     println "Running tests for type ${project.'test.gds_type'}"
     // Use junit platform for unit tests
     useJUnitPlatform()
+    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()}"]
+    }
+
+}