[ACT-1844] ActivitiRule fails if test methods are declared in a super class

modules/activiti-engine/src/main/java/org/activiti/engine/impl/test/TestHelper.java

@@ -85,7 +85,7 @@ public abstract class TestHelper {
     String deploymentId = null;
     Method method = null;
     try {
-      method = testClass.getDeclaredMethod(methodName, (Class<?>[])null);
+      method = testClass.getMethod(methodName, (Class<?>[]) null);
     } catch (Exception e) {
     	log.warn("Could not get method by reflection. This could happen if you are using @Parameters in combination with annotations.", e);
     	return null;
@@ -130,7 +130,7 @@ public abstract class TestHelper {
   	// Get method
   	 Method method = null;
      try {
-       method = testClass.getDeclaredMethod(methodName, (Class<?>[])null);
+       method = testClass.getMethod(methodName, (Class<?>[]) null);
      } catch (Exception e) {
     	log.warn("Could not get method by reflection. This could happen if you are using @Parameters in combination with annotations.", e); 
     	return;

modules/activiti-engine/src/test/java/org/activiti/standalone/testing/ActivitiRuleJunit4SubclassTest.java

+package org.activiti.standalone.testing;
+
+/**
+ * This test is explicitly empty.
+ *
+ * The purpose of this test is to make sure that ActivitiRule works with tests methods
+ * that are defined in a parent class.
+ *
+ * When running the test suite over this class, JUnit will execute the test from
+ * {@link ActivitiRuleJunit4Test}.  This means that the code in
+ * {@link org.activiti.engine.impl.test.TestHelper} needs to be able to find the
+ * test method even when it's not declared on the test class itself.
+ *
+ * Specifically, {@link org.activiti.engine.impl.test.TestHelper} needs to call getMethod()
+ * rather than getDeclaredMethod() since the method is declared in a parent of the
+ * actual test class.
+ */
+public class ActivitiRuleJunit4SubclassTest extends ActivitiRuleJunit4Test {
+
+}

modules/activiti-engine/src/test/resources/org/activiti/standalone/testing/ActivitiRuleJunit4SubclassTest.ruleUsageExample.bpmn20.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<definitions id="definitions"
+  xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" 
+  xmlns:activiti="http://activiti.org/bpmn"
+  targetNamespace="Examples">
+
+  <process id="ruleUsage">
+
+    <startEvent id="start" />
+    <sequenceFlow id="flow1" sourceRef="start" targetRef="theTask" />
+
+    <userTask id="theTask" name="My Task" />
+    <sequenceFlow id="flow2" sourceRef="theTask" targetRef="theEnd" />
+
+    <endEvent id="theEnd" />
+
+  </process>
+
+</definitions>
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