Added validation of CSS selectors

src/lib/Browser/Locator/CSSLocator.php

@@ -8,8 +8,17 @@
 
 namespace Ibexa\Behat\Browser\Locator;
 
+use Ibexa\Behat\Browser\Locator\Validator\CssLocatorValidator;
+
 class CSSLocator extends BaseLocator
 {
+    public function __construct(string $identifier, string $selector)
+    {
+        parent::__construct($identifier, $selector);
+        $validator = new CssLocatorValidator();
+        $validator->validate($this);
+    }
+
     public function getType(): string
     {
         return 'css';

src/lib/Browser/Locator/Validator/CssLocatorValidator.php

@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Behat\Browser\Locator\Validator;
+
+use Ibexa\Behat\Browser\Locator\CSSLocator;
+use Symfony\Component\CssSelector\Exception\ParseException;
+use Symfony\Component\CssSelector\Node\CombinedSelectorNode;
+use Symfony\Component\CssSelector\Node\ElementNode;
+use Symfony\Component\CssSelector\Node\FunctionNode;
+use Symfony\Component\CssSelector\Node\SelectorNode;
+use Symfony\Component\CssSelector\Parser\Parser;
+
+class CssLocatorValidator
+{
+    private Parser $parser;
+
+    private array $partiallySupportedPseudoClasses = ['first-of-type', 'last-of-type', 'nth-of-type', 'nth-last-of-type'];
+
+    public function __construct()
+    {
+        $this->parser = new Parser();
+    }
+
+    public function validate(CSSLocator $cssLocator): void
+    {
+        if (!$this->isValidSelector($cssLocator->getSelector())) {
+            throw new ParseException(
+                sprintf(
+                    "Locator '%s' with ID '%s' cannot be used because of limitations of the CssSelector component. See more: https://symfony.com/doc/current/components/css_selector.html#limitations-of-the-cssselector-component",
+                    $cssLocator->getSelector(),
+                    $cssLocator->getIdentifier()
+                )
+            );
+        }
+    }
+
+    private function isValidSelector(string $selector): bool
+    {
+        $tokens = $this->parser->parse($selector);
+
+        while (!empty($tokens)) {
+            $token = array_pop($tokens);
+
+            if ($token instanceof SelectorNode) {
+                array_push($tokens, $token->getTree());
+            }
+            if ($token instanceof CombinedSelectorNode) {
+                array_push($tokens, $token->getSelector(), $token->getSubSelector());
+            }
+
+            if ($token instanceof FunctionNode) {
+                if (!$this->isValidFunctionNode($token)) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    private function isValidFunctionNode(FunctionNode $node): bool
+    {
+        if (!in_array($node->getName(), $this->partiallySupportedPseudoClasses)) {
+            return true;
+        }
+
+        $selector = $node->getSelector();
+
+        if (!($selector instanceof ElementNode)) {
+            $selector = $selector->getSelector();
+        }
+
+        if ($selector->getElement() === null) {
+            return false;
+        }
+
+        return true;
+    }
+}

tests/Browser/Locator/Validator/CssLocatorValidatorTest.php

@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace  Ibexa\Tests\Behat\Browser\Locator\Validator;
+
+use Ibexa\Behat\Browser\Locator\CSSLocator;
+use Ibexa\Behat\Browser\Locator\Validator\CssLocatorValidator;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\CssSelector\Exception\ParseException;
+
+class CssLocatorValidatorTest extends TestCase
+{
+    private CssLocatorValidator $validator;
+
+    protected function setUp(): void
+    {
+        $this->validator = new CssLocatorValidator();
+    }
+
+    /**
+     * @dataProvider provideValidSelectors
+     */
+    public function testValidationPasses(string $selector): void
+    {
+        $this->validator->validate(new CSSLocator('test', $selector));
+        $this->expectNotToPerformAssertions();
+    }
+
+    /**
+     * @dataProvider provideInvalidSelectors
+     */
+    public function testValidationFails(string $selector): void
+    {
+        $this->expectException(ParseException::class);
+        $this->expectExceptionMessage(
+            sprintf(
+                "Locator '%s' with ID 'test' cannot be used because of limitations of the CssSelector component. See more: https://symfony.com/doc/current/components/css_selector.html#limitations-of-the-cssselector-component",
+                $selector
+            )
+        );
+        $this->validator->validate(new CSSLocator('test', $selector));
+    }
+
+    public static function provideValidSelectors(): iterable
+    {
+        return [
+            ['div'],
+            ['div:nth-of-type(1)'],
+            ['div.ibexa-content-field:nth-of-type(3)'],
+            ['selector1 section:nth-of-type(2)'],
+            ['tr td:nth-of-type(2)'],
+            ['[data-id="test"] div.ibexa-field-edit:nth-of-type(3)'],
+            ['div.ibexa-details__item:nth-of-type(2) .ibexa-details__item-content'],
+            ['.ibexa-version-compare__field-wrapper div.ibexa-content-field:nth-of-type(1) .ibexa-content-field__name'],
+            ['div.ibexa-dropdown__wrapper > ul.ibexa-dropdown__selection-info > li:nth-child(1)'],
+            ['.ibexa-dropdown__item:nth-child(3)'],
+            ['.nav-item:nth-child(2) .nav-link'],
+        ];
+    }
+
+    public static function provideInvalidSelectors(): iterable
+    {
+        return [
+            ['.ibexa:nth-of-type(1)'],
+            ['.ibexa-table__cell:nth-of-type(5),td:nth-of-type(5)'],
+            ['.ibexa-available-field-types__list > li:not(.ibexa-available-field-type--hidden) .ibexa-available-field-type__content:nth-of-type(5)'],
+            ['.c-finder-branch:nth-of-type(3) .c-finder-leaf'],
+            ['.selector .ibexa:nth-of-type(2)'],
+            ['.tab-pane.active .ibexa-fieldgroup:nth-of-type(2)'],
+            ['div.ibexa-ca-company-tab-company-profile__top-wrapper .ibexa-details__items .ibexa-details__item:nth-of-type(3) .ibexa-details__item-content'],
+        ];
+    }
+}

tests/lib/Core/Behat/ExtendedTableNodeTest.php

@@ -15,7 +15,6 @@
 
 /**
  * @copyright Copyright (C) eZ Systems AS. All rights reserved.
- *
  * @license For full copyright and license information view LICENSE file distributed with this source code.
  *
  * @internal