core/src/test/resources/com/opensymphony/xwork2/config/providers/xwork-test-interceptor-params.xml

<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 6.0//EN"
        "https://struts.apache.org/dtds/struts-6.0.dtd">
<struts>
	<include file="xwork-test-beans.xml" />
    <package name="default">
        <interceptors>
            <interceptor name="noop" class="org.apache.struts2.interceptor.NoOpInterceptor"/>
            <interceptor name="test" class="com.opensymphony.xwork2.mock.MockInterceptor">
                <param name="foo">fooDefault</param>
            </interceptor>

            <interceptor-stack name="defaultStack">
                <interceptor-ref name="noop"/>
                <interceptor-ref name="test"/>
            </interceptor-stack>
        </interceptors>

        <default-interceptor-ref name="defaultStack" />

        <action name="TestInterceptorParam" class="com.opensymphony.xwork2.SimpleAction">
            <interceptor-ref name="defaultStack">
                <param name="test.expectedFoo">expectedFooValue</param>
            </interceptor-ref>
        </action>

        <action name="TestInterceptorParamOverride" class="com.opensymphony.xwork2.SimpleAction">
            <interceptor-ref name="defaultStack">
                <param name="test.foo">foo123</param>
                <param name="test.expectedFoo">expectedFooValue2</param>
            </interceptor-ref>
        </action>
    </package>

</struts>