phpunit-xpath-assertions
Xpath assertions and constraints for use with PHPUnit.
Example
use PHPUnit\Framework\TestCase;
use PHPUnit\Xpath\Assert as XpathAssertions;
class MyProjectExampleTest extends TestCase
{
use XpathAssertions;
public function testChildElementExistsInDocument()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertXpathMatch('//child', $document);
}
public function testCompareChildElementFromDocument()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertXpathEquals('<child>TEXT</child>', '//child', $document);
}
}
Installation
Phar
If you're using PHPUnit as a PHAR, you can download this extension as PHAR, too. They the are available on the
release page. Download the extension *.phar
file
into a directory and provide the directory in the PHPUnit configuration file.
<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
extensionsDirectory="tools/phpunit.d">
</phpunit>
Composer
If you use Composer to manage the dependencies of your project then you can add the PHPUnit example extension as a development-time dependency to your project:
$ composer require --dev thomasweinert/phpunit-xpath-assertions
Usage
The library provides traits that you can use to add the assertions to your TestCase.
use PHPUnit\Xpath\Assert as XpathAssertions;
use PHPUnit\Xpath\Constraint as XpathConstraints;
class MyProjectExampleTest extends \PHPUnit\Framework\TestCase
{
use XpathAssertions;
use XpathConstraints;
}
Constraints
Use trait PHPUnit\Xpath\Constraint
. They can be used with assertThat()
or
with Mocks.
self::matchesXpathExpression()
function matchesXpathExpression(string $expression, array|\ArrayAccess $namespaces = [])
Validate if the provided Xpath expression matches something that is TRUE and not empty. It will fail if the expression returns an empty node list or an empty string or FALSE.
public function testChildElementExistsInDocument()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertThat(
$document,
self::matchesXpathExpression('//child')
);
}
self::matchesXpathResultCount()
function matchesXpathResultCount(
int $expectedCount, string $expression, array|\ArrayAccess $namespaces = array()
)
Returns true if the provided Xpath expression matches exactly the expected count of nodes.
public function testChildElementExistsOnTimeInDocument()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertThat(
$document,
self::matchesXpathResultCount(1, '//child')
);
}
self::equalToXpathResult()
function equalToXpathResult(
mixed $expected,
string $expression,
array|\ArrayAccess,
$namespaces = array()
)
If the expressions return a node list it compares the serialized XML of the matched nodes with the provided XML string or DOM. If the expression return a scalar uses a constraint depending on the type.
public function testCompareChildElementFromDocument()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertThat(
$document,
self::equalToXpathResult(
'<child>TEXT</child>',
'//child'
)
);
}
public function testCompareChildElementFromDocumentAsString()
{
$document = new \DOMDocument();
$document->loadXML('<root><child>TEXT</child></root>');
self::assertThat(
$document,
self::equalToXpathResult(
'TEXT',
'string(//child)'
)
);
}
Assertions
Use trait PHPUnit\Xpath\Assert
. These assertions are shortcuts for
assertThat()
.
- self::assertXpathMatch()
- self::assertXpathCount()
- self::assertXpathEquals()
Namespaces
All methods have an optional argument that allow to provide an namespace definition.
public function testChildWithNamespaceElementExistsTwoTimesInDocument()
{
$document = new \DOMDocument();
$document->loadXML(
'<example:root xmlns:example="urn:example">
<example:child>TEXT</example:child>
<example:child>TEXT</example:child>
</example:root>'
);
self::assertThat(
$document,
self::matchesXpathResultCount(2, '//e:child', ['e' => 'urn:example'])
);
}
JSON (>= 1.2.0)
The assertions can be used with JsonSerializable objects/arrays. They will be converted into a DOM representation internally.
public function testHomePhoneNumbersEqualsExpected()
{
self::assertXpathEquals(
[
[ 'type' => 'home', 'number' => '212 555-1234' ]
],
'phoneNumbers/*[type="home"]',
json_decode($wikipediaJsonExample)
);
}
Contributing
Contributions are welcome, please use the issue tracker to report bug and feature ideas.
Build a modified phar
This project includes build scripts to create your own phar file.
To create a phar call ./build/build-phar
.
Build a signed phar
To create a signed phar copy the dist.build.properties
to build.properties
and
set the gpg.user
. After that call ./build/build-phar package
.