Package com.github.restdriver.matchers

Source Code of com.github.restdriver.matchers.IsEquivalentXml

/**
* Copyright © 2010-2011 Nokia
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.restdriver.matchers;

import java.io.IOException;

import org.custommonkey.xmlunit.Diff;
import org.custommonkey.xmlunit.XMLUnit;
import org.hamcrest.Description;
import org.hamcrest.TypeSafeMatcher;
import org.xml.sax.SAXException;

import com.github.restdriver.exception.RuntimeAssertionFailure;

/**
* Hamcrest matcher for comparing two strings containing XML and determining whether they are
* equivalent (ignoring whitespace, attribute and element ordering etc.).
*/
public class IsEquivalentXml extends TypeSafeMatcher<String> {
   
    private final String xml;
   
    /**
     * Creates a new instance of the matcher.
     *
     * @param xml The XML to compare with.
     */
    public IsEquivalentXml(String xml) {
        this.xml = xml;
    }
   
    @Override
    public final void describeTo(Description description) {
        description.appendText("A string with XML equivalent to: " + xml);
    }
   
    @Override
    protected boolean matchesSafely(String item) {
       
        try {
            Diff diff = XMLUnit.compareXML(xml, item);
            return diff.identical();
        } catch (IOException e) {
            throw new RuntimeAssertionFailure("Failed to compare XML", e);
        } catch (SAXException e) {
            throw new RuntimeAssertionFailure("Failed to compare XML", e);
        }
    }
   
}
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