SoapUI中XML解析

From http://www.robert-nemet.com/2011/11/groovy-xml-parsing-in-soapui.html

Introduction

    Since soapUI allows users to add Groovy scripts in large number of places ( property expansions, setup /teardown scripts, listeners, test step, etc... ) users can use any technology to reach to the goal. Lets look at those which can make our life easier when it comes to XML parsing.

soapUI XML Support

    Old way would be soapUI way or using GroovyUtils from soapUI. Its goal is to simplify scripting and it can be instantiate from any Groovy script in soapUI, with:

where context is available in any Groovy script in soapUI. Lets look at GroovyUtils:

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )

GroovyUtils Methods
expand(property)	returns value of property, if there are property expansions they are expanded.
extractErrorLineNumber(error)	returns line number where error occurred
getProjectPath()	returns path to project file
getXml(node)	returns xml as a string from passed node
getXmlHolder(xmlPropertyOrString)	returns XmlHolder as a result of parsing passed Xml string
registerJdbcDriver(driver)	register JDBC driver for use in Groovy script
setPropertyValue(testStep, property, value)	sets a value for given test step property

This time getXmlHolder is one that does what we need. Pars a given string as XML and returns object which we can use to manipulate with it.

XmlHolder Methods
declareNamespace(prefix, uri)	declare namespace prefix and URI
getDomNode(xpath)	returns a DOM node pointed by XPath expression
getDomNodes(xpath)	returns an array of DOM nodes pointed by XPath expression
getNamespaces()	returns a Map of namespaces
getNodeValue(xpath)	returns a value of node specified by XPath expression
getNodeValues(xpath)	returns an array of values specified by XPath expression
getPrettyXml()	returns a formatted XML
getXml()	returns a XML
getXmlObject()	returns a XmlBean Object
removeDomNodes(xpath)	removes a nodes specified by XPath expression
setNodeValue(xpath, value)	set a node value
updateProperty()	if a XmlHolder is created from test step property this updates that property
updateProperty(prettyPrint)	if a XmlHolder is created from test step property this updates that property with well formatted XML

Few Examples

Assume you have response:

For this examples I added a Properties Test Step  with property response.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:sim="http://www.example.org/SimpleSocialSOA/">
   <soapenv:Header/>
   <soapenv:Body>
      <sim:LoginResponse>
         <id>4456643453</id>
      </sim:LoginResponse>
   </soapenv:Body>
</soapenv:Envelope> 

1. Parsing XML

According to that to get id from response you can do:

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )
def holder = groovyUtils.getXmlHolder("Properties#response")
log.info holder.getNodeValue("//id")
log.info holder['//id']

notice two ways to get node value with getNodeValue method and with [] operator. Difference is that getNodeValue will return first value that can be found with set XPath, while [] operator returns a array of values.
If you assume that response is like:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:sim="http://www.example.org/SimpleSocialSOA/">
   <soapenv:Header/>
   <soapenv:Body>
      <sim:LoginResponse>
         <id>4456643453</id>
         <id>4456643452</id>
         <id>4456643451</id>
         <id>4456643450</id>
      </sim:LoginResponse>
   </soapenv:Body>
</soapenv:Envelope>

Than this script:

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )
def holder = groovyUtils.getXmlHolder("Properties#response")
log.info holder.getNodeValue("//id")
for( node in holder['//id'] )
 log.info node

will produce result like this:

2. Updating XML

Response as above and we do:

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )
def holder = groovyUtils.getXmlHolder("Properties#response")
holder.setNodeValue("//id", "aaaaa")
for( node in holder['//id'] )
 log.info node
def holder2 = groovyUtils.getXmlHolder("Properties#response")
holder2.getNodeValue("//id")
for( node in holder2['//id'] )
 log.info node

 Result is:

from this we can learn:

• if there are several nodes as result of XPath expression only first's node value will be changed with setNodeValue
• setting node value is not enough to update property value, we forgot to use updateProperty method

Correct Groovy script would be:

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )
def holder = groovyUtils.getXmlHolder("Properties#response")
holder.setNodeValue("//id", "aaaaa")
for( node in holder['//id'] )
 log.info node
holder.updateProperty()
def holder2 = groovyUtils.getXmlHolder("Properties#response")
holder2.getNodeValue("//id")
for( node in holder2['//id'] )
 log.info node

Instead of using:

holder.setNodeValue("//id", "aaaaa")

you can use also:

holder["//id"] = "aaaaa"

And if XmlNode is created from property as in example above use updateProperty method to apply your changes to property or use GroovyUtils.setPropertyValue method. 



Groovy XML

There are three classes built in Groovy for processing XML: XMLParser, XMLSlurper and DOMCategory. Best practice is to use XMLSlurper in soapUI. Reason is that it have smallest memory footprint from all three. I would no go in depths for those, you can read here XML processing.
This for example:

import groovy.xml.StreamingMarkupBuilder
def response = context.testCase.testSteps['Properties'].properties['response'].value
def responseXml = new XmlSlurper().parseText(response)
responseXml.breadthFirst().each {
 def v = it.toString()
 if ( it.name() == 'id')
    it.replaceBody("$v XX")
 }

appends " XX" to values of all id nodes.

Generally it is easier to use GroovyUtils but if you are familiar or invest some time in XmlSlurper you can get better results and more flexible scripts.