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1072 lines (1004 loc) · 31.4 KB
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<?php
namespace Codeception\Module;
use Codeception\Module as CodeceptionModule;
use Codeception\TestCase;
use Codeception\Exception\ModuleException as ModuleException;
use Codeception\Lib\Framework;
use Codeception\Lib\InnerBrowser;
use Codeception\Lib\Interfaces\DependsOnModule;
use Codeception\Lib\Interfaces\PartedModule;
use Codeception\Util\JsonArray;
use Codeception\Util\JsonType;
use Codeception\Util\XmlStructure;
use Symfony\Component\BrowserKit\Cookie;
use Codeception\Util\Soap as XmlUtils;
/**
* Module for testing REST WebService.
*
* This module can be used either with frameworks or PHPBrowser.
* It tries to guess the framework is is attached to.
*
* Whether framework is used it operates via standard framework modules.
* Otherwise sends raw HTTP requests to url via PHPBrowser.
*
* ## Status
*
* * Maintainer: **tiger-seo**, **davert**
* * Stability: **stable**
* * Contact: codecept@davert.mail.ua
* * Contact: tiger.seo@gmail.com
*
* ## Configuration
*
* * url *optional* - the url of api
*
* This module requires PHPBrowser or any of Framework modules enabled.
*
* ### Example
*
* modules:
* enabled:
* - REST:
* depends: PhpBrowser
* url: 'http://serviceapp/api/v1/'
*
* ## Public Properties
*
* * headers - array of headers going to be sent.
* * params - array of sent data
* * response - last response (string)
*
*
* ## Parts
*
* * Json - actions for validating Json responses (no Xml responses)
* * Xml - actions for validating XML responses (no Json responses)
*
*/
class REST extends CodeceptionModule implements DependsOnModule, PartedModule
{
protected $config = [
'url' => '',
'xdebug_remote' => false
];
protected $dependencyMessage = <<<EOF
Example configuring PhpBrowser as backend for REST module.
--
modules:
enabled:
- REST:
depends: PhpBrowser
url: http://localhost/api/
--
Framework modules can be used for testing of API as well.
EOF;
/**
* @var \Symfony\Component\HttpKernel\Client|\Symfony\Component\BrowserKit\Client
*/
public $client = null;
public $isFunctional = false;
protected $connectionModule;
public $headers = [];
public $params = [];
public $response = "";
public function _before(TestCase $test)
{
$this->client = &$this->connectionModule->client;
$this->resetVariables();
if ($this->config['xdebug_remote']
&& function_exists('xdebug_is_enabled')
&& ini_get('xdebug.remote_enable')
&& !$this->isFunctional
) {
$cookie = new Cookie('XDEBUG_SESSION', $this->config['xdebug_remote'], null, '/');
$this->client->getCookieJar()->set($cookie);
}
}
protected function resetVariables()
{
$this->headers = [];
$this->params = [];
$this->response = "";
if ($this->client) {
$this->client->setServerParameters([]);
}
}
public function _depends()
{
return ['Codeception\Lib\InnerBrowser' => $this->dependencyMessage];
}
public function _parts()
{
return ['xml', 'json'];
}
public function _inject(InnerBrowser $connection)
{
$this->connectionModule = $connection;
if ($this->connectionModule instanceof Framework) {
$this->isFunctional = true;
}
if ($this->connectionModule instanceof PhpBrowser) {
if (!$this->connectionModule->_getConfig('url')) {
$this->connectionModule->_setConfig(['url' => $this->config['url']]);
}
}
}
private function getRunningClient()
{
if ($this->client->getHistory()->isEmpty()) {
throw new ModuleException($this, "Response is empty. Use `\$I->sendXXX()` methods to send HTTP request");
}
return $this->client;
}
/**
* Sets HTTP header
*
* @param $name
* @param $value
* @part json
* @part xml
*/
public function haveHttpHeader($name, $value)
{
$this->headers[$name] = $value;
}
/**
* Checks over the given HTTP header and (optionally)
* its value, asserting that are there
*
* @param $name
* @param $value
* @part json
* @part xml
*/
public function seeHttpHeader($name, $value = null)
{
if ($value !== null) {
$this->assertEquals(
$this->getRunningClient()->getInternalResponse()->getHeader($name),
$value
);
return;
}
$this->assertNotNull($this->getRunningClient()->getInternalResponse()->getHeader($name));
}
/**
* Checks over the given HTTP header and (optionally)
* its value, asserting that are not there
*
* @param $name
* @param $value
* @part json
* @part xml
*/
public function dontSeeHttpHeader($name, $value = null)
{
if ($value !== null) {
$this->assertNotEquals(
$this->getRunningClient()->getInternalResponse()->getHeader($name),
$value
);
return;
}
$this->assertNull($this->getRunningClient()->getInternalResponse()->getHeader($name));
}
/**
* Checks that http response header is received only once.
* HTTP RFC2616 allows multiple response headers with the same name.
* You can check that you didn't accidentally sent the same header twice.
*
* ``` php
* <?php
* $I->seeHttpHeaderOnce('Cache-Control');
* ?>>
* ```
*
* @param $name
* @part json
* @part xml
*/
public function seeHttpHeaderOnce($name)
{
$headers = $this->getRunningClient()->getInternalResponse()->getHeader($name, false);
$this->assertEquals(1, count($headers));
}
/**
* Returns the value of the specified header name
*
* @param $name
* @param Boolean $first Whether to return the first value or all header values
*
* @return string|array The first header value if $first is true, an array of values otherwise
* @part json
* @part xml
*/
public function grabHttpHeader($name, $first = true)
{
return $this->getRunningClient()->getInternalResponse()->getHeader($name, $first);
}
/**
* Adds HTTP authentication via username/password.
*
* @param $username
* @param $password
* @part json
* @part xml
*/
public function amHttpAuthenticated($username, $password)
{
if ($this->isFunctional) {
$this->client->setServerParameter('PHP_AUTH_USER', $username);
$this->client->setServerParameter('PHP_AUTH_PW', $password);
} else {
$this->client->setAuth($username, $password);
}
}
/**
* Adds Digest authentication via username/password.
*
* @param $username
* @param $password
* @part json
* @part xml
*/
public function amDigestAuthenticated($username, $password)
{
$this->client->setAuth($username, $password, CURLAUTH_DIGEST);
}
/**
* Adds Bearer authentication via access token.
*
* @param $accessToken
* @part json
* @part xml
*/
public function amBearerAuthenticated($accessToken)
{
$this->haveHttpHeader('Authorization', 'Bearer ' . $accessToken);
}
/**
* Sends a POST request to given uri.
*
* Parameters and files (as array of filenames) can be provided.
*
* @param $url
* @param array|\JsonSerializable $params
* @param array $files
* @part json
* @part xml
*/
public function sendPOST($url, $params = [], $files = [])
{
$this->execute('POST', $url, $params, $files);
}
/**
* Sends a HEAD request to given uri.
*
* @param $url
* @param array $params
* @part json
* @part xml
*/
public function sendHEAD($url, $params = [])
{
$this->execute('HEAD', $url, $params);
}
/**
* Sends an OPTIONS request to given uri.
*
* @param $url
* @param array $params
* @part json
* @part xml
*/
public function sendOPTIONS($url, $params = [])
{
$this->execute('OPTIONS', $url, $params);
}
/**
* Sends a GET request to given uri.
*
* @param $url
* @param array $params
* @part json
* @part xml
*/
public function sendGET($url, $params = [])
{
$this->execute('GET', $url, $params);
}
/**
* Sends PUT request to given uri.
*
* @param $url
* @param array $params
* @param array $files
* @part json
* @part xml
*/
public function sendPUT($url, $params = [], $files = [])
{
$this->execute('PUT', $url, $params, $files);
}
/**
* Sends PATCH request to given uri.
*
* @param $url
* @param array $params
* @param array $files
* @part json
* @part xml
*/
public function sendPATCH($url, $params = [], $files = [])
{
$this->execute('PATCH', $url, $params, $files);
}
/**
* Sends DELETE request to given uri.
*
* @param $url
* @param array $params
* @param array $files
* @part json
* @part xml
*/
public function sendDELETE($url, $params = [], $files = [])
{
$this->execute('DELETE', $url, $params, $files);
}
/**
* Sets Headers "Link" as one header "Link" based on linkEntries
*
* @param array $linkEntries (entry is array with keys "uri" and "link-param")
*
* @link http://tools.ietf.org/html/rfc2068#section-19.6.2.4
*
* @author samva.ua@gmail.com
*/
private function setHeaderLink(array $linkEntries)
{
$values = [];
foreach ($linkEntries as $linkEntry) {
\PHPUnit_Framework_Assert::assertArrayHasKey(
'uri',
$linkEntry,
'linkEntry should contain property "uri"'
);
\PHPUnit_Framework_Assert::assertArrayHasKey(
'link-param',
$linkEntry,
'linkEntry should contain property "link-param"'
);
$values[] = $linkEntry['uri'] . '; ' . $linkEntry['link-param'];
}
$this->headers['Link'] = join(', ', $values);
}
/**
* Sends LINK request to given uri.
*
* @param $url
* @param array $linkEntries (entry is array with keys "uri" and "link-param")
*
* @link http://tools.ietf.org/html/rfc2068#section-19.6.2.4
*
* @author samva.ua@gmail.com
* @part json
* @part xml
*/
public function sendLINK($url, array $linkEntries)
{
$this->setHeaderLink($linkEntries);
$this->execute('LINK', $url);
}
/**
* Sends UNLINK request to given uri.
*
* @param $url
* @param array $linkEntries (entry is array with keys "uri" and "link-param")
* @link http://tools.ietf.org/html/rfc2068#section-19.6.2.4
* @author samva.ua@gmail.com
* @part json
* @part xml
*/
public function sendUNLINK($url, array $linkEntries)
{
$this->setHeaderLink($linkEntries);
$this->execute('UNLINK', $url);
}
protected function execute($method = 'GET', $url, $parameters = [], $files = [])
{
$this->debugSection("Request headers", $this->headers);
foreach ($this->headers as $header => $val) {
$header = str_replace('-', '_', strtoupper($header));
$this->client->setServerParameter("HTTP_$header", $val);
// Issue #1650 - Symfony BrowserKit changes HOST header to request URL
if ($header === 'HOST') {
$this->client->setServerParameter("HTTP_ HOST", $val);
}
// Issue #827 - symfony foundation requires 'CONTENT_TYPE' without HTTP_
if ($this->isFunctional && $header === 'CONTENT_TYPE') {
$this->client->setServerParameter($header, $val);
}
}
// allow full url to be requested
if (strpos($url, '://') === false) {
$url = $this->config['url'] . $url;
}
$this->params = $parameters;
$parameters = $this->encodeApplicationJson($method, $parameters);
if (is_array($parameters) || $method === 'GET') {
if (!empty($parameters) && $method === 'GET') {
$url .= '?' . http_build_query($parameters);
}
if ($method == 'GET') {
$this->debugSection("Request", "$method $url");
} else {
$this->debugSection("Request", "$method $url " . json_encode($parameters));
}
$this->client->request($method, $url, $parameters, $files);
} else {
$this->debugSection("Request", "$method $url " . $parameters);
$this->client->request($method, $url, [], $files, [], $parameters);
}
$this->response = (string)$this->client->getInternalResponse()->getContent();
$this->debugSection("Response", $this->response);
if (count($this->client->getInternalRequest()->getCookies())) {
$this->debugSection('Cookies', $this->client->getInternalRequest()->getCookies());
}
$this->debugSection("Headers", $this->client->getInternalResponse()->getHeaders());
$this->debugSection("Status", $this->client->getInternalResponse()->getStatus());
}
protected function encodeApplicationJson($method, $parameters)
{
if ($method !== 'GET' && array_key_exists('Content-Type', $this->headers)
&& ($this->headers['Content-Type'] === 'application/json'
|| preg_match('!^application/.+\+json$!', $this->headers['Content-Type'])
)
) {
if ($parameters instanceof \JsonSerializable) {
return json_encode($parameters);
}
if (is_array($parameters) || $parameters instanceof \ArrayAccess) {
$parameters = $this->scalarizeArray($parameters);
return json_encode($parameters);
}
}
return $parameters;
}
/**
* Checks whether last response was valid JSON.
* This is done with json_last_error function.
*
* @part json
*/
public function seeResponseIsJson()
{
json_decode($this->response);
$errorCode = json_last_error();
\PHPUnit_Framework_Assert::assertEquals(
JSON_ERROR_NONE,
$errorCode,
"json decoding error #$errorCode, see http://php.net/manual/en/function.json-last-error.php"
);
}
/**
* Checks whether the last response contains text.
*
* @param $text
* @part json
* @part xml
*/
public function seeResponseContains($text)
{
$this->assertContains($text, $this->response, "REST response contains");
}
/**
* Checks whether last response do not contain text.
*
* @param $text
* @part json
* @part xml
*/
public function dontSeeResponseContains($text)
{
$this->assertNotContains($text, $this->response, "REST response contains");
}
/**
* Checks whether the last JSON response contains provided array.
* The response is converted to array with json_decode($response, true)
* Thus, JSON is represented by associative array.
* This method matches that response array contains provided array.
*
* Examples:
*
* ``` php
* <?php
* // response: {name: john, email: john@gmail.com}
* $I->seeResponseContainsJson(array('name' => 'john'));
*
* // response {user: john, profile: { email: john@gmail.com }}
* $I->seeResponseContainsJson(array('email' => 'john@gmail.com'));
*
* ?>
* ```
*
* This method recursively checks if one array can be found inside of another.
*
* @param array $json
* @part json
*/
public function seeResponseContainsJson($json = [])
{
$jsonResponseArray = new JsonArray($this->response);
\PHPUnit_Framework_Assert::assertTrue(
$jsonResponseArray->containsArray($json),
"Response JSON contains provided\n"
. "- <info>" . var_export($json, true) . "</info>\n"
. "+ " . var_export($jsonResponseArray->toArray(), true)
);
}
/**
* Returns current response so that it can be used in next scenario steps.
*
* Example:
*
* ``` php
* <?php
* $user_id = $I->grabResponse();
* $I->sendPUT('/user', array('id' => $user_id, 'name' => 'davert'));
* ?>
* ```
*
* @version 1.1
* @return string
* @part json
* @part xml
*/
public function grabResponse()
{
return $this->response;
}
/**
* Returns data from the current JSON response using [JSONPath](http://goessner.net/articles/JsonPath/) as selector.
* JsonPath is XPath equivalent for querying Json structures. Try your JsonPath expressions [online](http://jsonpath.curiousconcept.com/).
* Even for a single value an array is returned.
*
* This method **require [`flow/jsonpath` > 0.2](https://github.com/FlowCommunications/JSONPath/) library to be installed**.
*
* Example:
*
* ``` php
* <?php
* // match the first `user.id` in json
* $firstUserId = $I->grabDataFromResponseByJsonPath('$..users[0].id');
* $I->sendPUT('/user', array('id' => $firstUserId[0], 'name' => 'davert'));
* ?>
* ```
*
* @param string $jsonPath
* @return array Array of matching items
* @version 2.0.9
* @throws \Exception
* @part json
*/
public function grabDataFromResponseByJsonPath($jsonPath)
{
return (new JsonArray($this->response))->filterByJsonPath($jsonPath);
}
/**
* Checks if json structure in response matches the xpath provided.
* JSON is not supposed to be checked against XPath, yet it can be converted to xml and used with XPath.
* This assertion allows you to check the structure of response json.
* *
* ```json
* { "store": {
* "book": [
* { "category": "reference",
* "author": "Nigel Rees",
* "title": "Sayings of the Century",
* "price": 8.95
* },
* { "category": "fiction",
* "author": "Evelyn Waugh",
* "title": "Sword of Honour",
* "price": 12.99
* }
* ],
* "bicycle": {
* "color": "red",
* "price": 19.95
* }
* }
* }
* ```
*
* ```php
* <?php
* // at least one book in store has author
* $I->seeResponseJsonMatchesXpath('//store/book/author');
* // first book in store has author
* $I->seeResponseJsonMatchesXpath('//store/book[1]/author');
* // at least one item in store has price
* $I->seeResponseJsonMatchesXpath('/store//price');
* ?>
* ```
* @part json
* @version 2.0.9
*/
public function seeResponseJsonMatchesXpath($xpath)
{
$this->assertGreaterThan(
0, (new JsonArray($this->response))->filterByXPath($xpath)->length,
"Received JSON did not match the XPath `$xpath`.\nJson Response: \n" . $this->response
);
}
/**
* Checks if json structure in response matches [JsonPath](http://goessner.net/articles/JsonPath/).
* JsonPath is XPath equivalent for querying Json structures. Try your JsonPath expressions [online](http://jsonpath.curiousconcept.com/).
* This assertion allows you to check the structure of response json.
*
* This method **require [`flow/jsonpath` > 0.2](https://github.com/FlowCommunications/JSONPath/) library to be installed**.
*
* ```json
* { "store": {
* "book": [
* { "category": "reference",
* "author": "Nigel Rees",
* "title": "Sayings of the Century",
* "price": 8.95
* },
* { "category": "fiction",
* "author": "Evelyn Waugh",
* "title": "Sword of Honour",
* "price": 12.99
* }
* ],
* "bicycle": {
* "color": "red",
* "price": 19.95
* }
* }
* }
* ```
*
* ```php
* <?php
* // at least one book in store has author
* $I->seeResponseJsonMatchesJsonPath('$.store.book[*].author');
* // first book in store has author
* $I->seeResponseJsonMatchesJsonPath('$.store.book[0].author');
* // at least one item in store has price
* $I->seeResponseJsonMatchesJsonPath('$.store..price');
* ?>
* ```
*
* @part json
* @version 2.0.9
*/
public function seeResponseJsonMatchesJsonPath($jsonPath)
{
$this->assertNotEmpty(
(new JsonArray($this->response))->filterByJsonPath($jsonPath),
"Received JSON did not match the JsonPath provided\n" . $this->response
);
}
/**
* Opposite to seeResponseJsonMatchesJsonPath
*
* @param array $jsonPath
* @part json
*/
public function dontSeeResponseJsonMatchesJsonPath($jsonPath)
{
$this->assertEmpty(
(new JsonArray($this->response))->filterByJsonPath($jsonPath),
"Received JSON did (but should not) match the JsonPath provided\n" . $this->response
);
}
/**
* Opposite to seeResponseContainsJson
*
* @part json
* @param array $json
*/
public function dontSeeResponseContainsJson($json = [])
{
$jsonResponseArray = new JsonArray($this->response);
$this->assertFalse(
$jsonResponseArray->containsArray($json),
"Response JSON does not contain JSON provided\n"
. "- <info>" . var_export($json, true) . "</info>\n"
. "+ " . var_export($jsonResponseArray->toArray(), true)
);
}
/**
* Checks that Json matches provided types.
* In case you don't know the actual values of JSON data returned you can match them by type.
* Starts check with a root element. If JSON data is array it will check the first element of an array.
* You can specify the path in the json which should be checked with JsonPath
*
* Basic example:
*
* ```php
* <?php
* // {'user_id': 1, 'name': 'davert', 'is_active': false}
* $I->seeResponseIsJsonType([
* 'user_id' => 'integer',
* 'name' => 'string|null',
* 'is_active' => 'boolean'
* ]);
*
* // narrow down matching with JsonPath:
* // {"users": [{ "name": "davert"}, {"id": 1}]}
* $I->seeResponseMatchesJsonType(['name' => 'string'], '$.users[0]');
* ?>
* ```
*
* In this case you can match that record contains fields with data types you expected.
* The list of possible data types:
*
* * string
* * integer
* * float
* * array (json object is array as well)
* * boolean
*
* You can also use nested data type structures:
*
* ```php
* <?php
* // {'user_id': 1, 'name': 'davert', 'company': {'name': 'Codegyre'}}
* $I->seeResponseIsJsonType([
* 'user_id' => 'integer|string', // multiple types
* 'company' => ['name' => 'string']
* ]);
* ?>
* ```
*
* You can also apply filters to check values. Filter can be applied with `:` char after the type declatation.
*
* Here is the list of possible filters:
*
* * `integer:>{val}` - checks that integer is greater than {val} (works with float and string types too).
* * `integer:<{val}` - checks that integer is lower than {val} (works with float and string types too).
* * `string:url` - checks that value is valid url.
* * `string:regex({val})` - checks that string matches a regex provided with {val}
*
* This is how filters can be used:
*
* ```php
* <?php
* // {'user_id': 1, 'email' => 'davert@codeception.com'}
* $I->seeResponseIsJsonType([
* 'user_id' => 'string:>0:<1000', // multiple filters can be used
* 'email' => 'string:regex(~\@~)' // we just check that @ char is included
* ]);
*
* // {'user_id': '1'}
* $I->seeResponseIsJsonType([
* 'user_id' => 'string:>0', // works with strings as well
* }
* ?>
* ```
*
* You can also add custom filters y accessing `JsonType::addCustomFilter` method.
* See [JsonType reference](http://codeception.com/docs/reference/JsonType).
*
* @part json
* @version 2.1.3
* @param array $jsonType
*/
public function seeResponseMatchesJsonType(array $jsonType, $jsonPath = null)
{
$jsonArray = new JsonArray($this->response);
if ($jsonPath) {
$jsonArray = $jsonArray->filterByJsonPath($jsonPath);
}
$matched = (new JsonType($jsonArray))->matches($jsonType);
$this->assertTrue($matched, $matched);
}
/**
* Opposite to `seeResponseMatchesJsonType`.
*
* @part json
* @see seeResponseMatchesJsonType
* @param $jsonType jsonType structure
* @param null $jsonPath optionally set specific path to structure with JsonPath
* @version 2.1.3
*/
public function dontSeeResponseMatchesJsonType($jsonType, $jsonPath = null)
{
$jsonArray = new JsonArray($this->response);
if ($jsonPath) {
$jsonArray = $jsonArray->filterByJsonPath($jsonPath);
}
$matched = (new JsonType($jsonArray))->matches($jsonType);
$this->assertNotEquals(true, $matched, sprintf("Unexpectedly the response matched the %s data type", var_export($jsonType, true)));
}
/**
* Checks if response is exactly the same as provided.
*
* @part json
* @part xml
* @param $response
*/
public function seeResponseEquals($response)
{
$this->assertEquals($response, $this->response);
}
/**
* Checks response code equals to provided value.
*
* @part json
* @part xml
* @param $code
*/
public function seeResponseCodeIs($code)
{
$this->assertEquals($code, $this->getRunningClient()->getInternalResponse()->getStatus());
}
/**
* Checks that response code is not equal to provided value.
*
* @part json
* @part xml
* @param $code
*/
public function dontSeeResponseCodeIs($code)
{
$this->assertNotEquals($code, $this->getRunningClient()->getInternalResponse()->getStatus());
}
/**
* Checks whether last response was valid XML.
* This is done with libxml_get_last_error function.
*
* @part xml
*/
public function seeResponseIsXml()
{
libxml_use_internal_errors(true);
$doc = simplexml_load_string($this->response);
$num = "";
$title = "";
if ($doc === false) {
$error = libxml_get_last_error();
$num = $error->code;
$title = trim($error->message);
libxml_clear_errors();
}
libxml_use_internal_errors(false);
\PHPUnit_Framework_Assert::assertNotSame(
false,
$doc,
"xml decoding error #$num with message \"$title\", see http://www.xmlsoft.org/html/libxml-xmlerror.html"
);
}
/**
* Checks wheather XML response matches XPath
*
* ```php
* <?php
* $I->seeXmlResponseMatchesXpath('//root/user[@id=1]');
* ```
* @part xml
* @param $xpath
*/
public function seeXmlResponseMatchesXpath($xpath)
{
$structure = new XmlStructure($this->response);
$this->assertTrue($structure->matchesXpath($xpath), 'xpath not matched');
}
/**
* Checks wheather XML response does not match XPath
*
* ```php
* <?php
* $I->dontSeeXmlResponseMatchesXpath('//root/user[@id=1]');
* ```
* @part xml
* @param $xpath
*/
public function dontSeeXmlResponseMatchesXpath($xpath)
{
$structure = new XmlStructure($this->response);
$this->assertTrue($structure->matchesXpath($xpath), 'accidentally matched xpath');
}
/**
* Finds and returns text contents of element.
* Element is matched by either CSS or XPath
*
* @param $cssOrXPath
* @return string
* @part xml
*/
public function grabTextContentFromXmlElement($cssOrXPath)
{
$el = (new XmlStructure($this->response))->matchElement($cssOrXPath);
return $el->textContent;
}
/**
* Finds and returns attribute of element.
* Element is matched by either CSS or XPath
*
* @param $cssOrXPath
* @param $attribute
* @return string
* @part xml
*/
public function grabAttributeFrom($cssOrXPath, $attribute)
{
$el = (new XmlStructure($this->response))->matchElement($cssOrXPath);
if (!$el->hasAttribute($attribute)) {
$this->fail("Attribute not found in element matched by '$cssOrXPath'");
}
return $el->getAttribute($attribute);
}
/**
* Checks XML response equals provided XML.