How Java uses XML Unit to test XML files and compare the content of XML files
To test the content comparison between XML files using XML Unit, you can use the XML Unit library. You can include XML Unit by adding the following dependencies in the Maven project:
<dependency>
<groupId>org.xmlunit</groupId>
<artifactId>xmlunit-core</artifactId>
<version>2.8.2</version>
<scope>test</scope>
</dependency>
The following is a Java example code that compares two XML files using XML Unit:
import org.xmlunit.builder.DiffBuilder;
import org.xmlunit.diff.Diff;
import org.xmlunit.diff.Difference;
import org.xmlunit.diff.DifferenceEvaluator;
import org.xmlunit.util.Nodes;
public class XMLComparison {
public static void main(String[] args) {
String expectedXML = "<root><element1>value1</element1></root>";
String actualXML = "<root><element1>value2</element1></root>";
Diff xmlDiff = DiffBuilder.compare(expectedXML)
.withTest(actualXML)
.build();
if (xmlDiff.hasDifferences()) {
System.out.println("XML files are not identical.");
for (Difference difference : xmlDiff.getDifferences()) {
System.out.println("Difference: " + difference.getDescription());
//Get Differences Node
System.out.println("Expected: " + Nodes.getNodeAsString(difference.getComparison().getControlDetails().getTarget()));
System.out.println("Actual: " + Nodes.getNodeAsString(difference.getComparison().getTestDetails().getTarget()));
}
} else {
System.out.println("XML files are identical.");
}
}
}
In the above example code, we pass' expectedXML 'and' actualXML 'as strings to the' DiffBuilder. compare() 'method. Then, we check for any differences using the 'xmlDiff. hasDifferences()' method. If there are differences, we can use the 'xmlDiff. getDifferences()' method to obtain all the differences, and use the 'Nodes. getNodeAsString()' method to obtain the string representation of the difference nodes. Finally, we can handle the differences as needed.
Please note that the above example code assumes that the root node of two XML files is'<root>'and only contains one child element'<element1>'.
Here is an example of 'expectedXML' and 'actualXML':
<!-- expectedXML -->
<root>
<element1>value1</element1>
</root>
<!-- actualXML -->
<root>
<element1>value2</element1>
</root>
I hope this can help you start using XML Unit for XML file comparison.
