PHPUnit assertXmlStringNotEqualsXmlString() Function

The assertXmlStringNotEqualsXmlString() function is a builtin function in PHPUnit and is used to assert whether the actual XML string is not equals to expected XML string. This assertion will return true in the case if the expected XML string is not the same as the actual XML string else returns false. In case of true the asserted test case got passed else test case got failed.

Syntax:

assertXmlStringNotEqualsXmlString(string $expectedXml, 
string $actualXml[, string $message = ''])

Parameters: This function accepts three parameters as mentioned above and described below:

• $expectedXmlString: This parameter is of any type which represent the expected Xml string.
• $actualXmlString: This parameter is of any type which represent the actual Xml String.
• $message: This parameter takes string value. When the test case got failed this string message got displayed as error message.

Below examples illustrate the assertXmlStringNotEqualsXmlString() function in PHPUnit:

Example 1:

<?php 
use PHPUnit\Framework\TestCase; 
  
class GeeksPhpunitTestCase extends TestCase 
{ 
    public function testNegativeTestcaseForassertXmlStringNotEqualsXmlString()
    { 
        $expectedxmlString  =  '<foo><baz></baz></foo>'; 
        $actualxmlString    =  '<foo><baz></baz></foo>';
        // Assert function to test whether given 
        // expected xml string is not equal to actual xml string
        $this->assertXmlStringNotEqualsXmlString(
            $actualxmlString,
            $expectedxmlString,
            "actual xml string is not equal to expected xml string"
        ); 
    } 
} 
  
?> 

Output:

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

F                                                                1 / 1 (100%)

Time: 89 ms, Memory: 10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testPositiveTestcaseForassertXmlFileNotEqualsXmlFile
actual xml string is equal to expected xml string
Failed asserting that DOMDocument Object &000000007c4380e1000000004a99fb25 
() is not equal to DOMDocument Object &000000007c4380e6000000004a99fb25 ().

/home/lovely/Documents/php/test.php:16

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.

Example 2:

<?php 
use PHPUnit\Framework\TestCase; 
  
class GeeksPhpunitTestCase extends TestCase 
{ 
    public function testPositiveTestcaseForassertXmlStringNotEqualsXmlString()
    { 
        $expectedxmlString  =  '<foo><bazx></bazx></foo>'; 
        $actualxmlString    =  '<foo><baz></baz></foo>';
        // Assert function to test whether given 
        // expected xml string is not equal to actual xml string
        $this->assertXmlStringNotEqualsXmlString(
            $actualxmlString,
            $expectedxmlString,
            "actual xml string is not equal to expected xml string"
        ); 
    } 
} 
  
?> 

Output:

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                                 1 / 1 (100%)

Time: 87 ms, Memory: 10.00 MB

OK (1 test, 1 assertion)