我正在尝试为activiti中的一个简单进程运行单元测试但是我一直在例外。我已经搜索并认为问题出在 activiti.cfg.xml 文件本身，它需要一个构造函数，但它有一个属性。测试是自动生成的，还有 activiti.cfg.xml 文件。所以我想知道应该改变什么才能让它发挥作用。
这是xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
<property name="databaseSchemaUpdate" value="true"/>
</bean>
</beans>
这就是错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processEngineConfiguration' defined in class path resource [activiti.cfg.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration]: No default constructor found; nested exception is java.lang.NoClassDefFoundError: org/apache/ibatis/type/TypeHandler
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1228)