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<?php /** * This file is part of CodeIgniter 4 framework. * * (c) CodeIgniter Foundation <admin@codeigniter.com> * * For the full copyright and license information, please view * the LICENSE file that was distributed with this source code. */ namespace CodeIgniter\Test; use BadMethodCallException; use DOMDocument; use DOMNodeList; use DOMXPath; use InvalidArgumentException; /** * Load a response into a DOMDocument for testing assertions based on that */ class DOMParser { /** * DOM for the body, * * @var DOMDocument */ protected $dom; /** * Constructor. * * @throws BadMethodCallException */ public function __construct() { if (! extension_loaded('DOM')) { throw new BadMethodCallException('DOM extension is required, but not currently loaded.'); // @codeCoverageIgnore } $this->dom = new DOMDocument('1.0', 'utf-8'); } /** * Returns the body of the current document. */ public function getBody(): string { return $this->dom->saveHTML(); } /** * Sets a string as the body that we want to work with. * * @return $this */ public function withString(string $content) { // DOMDocument::loadHTML() will treat your string as being in ISO-8859-1 // (the HTTP/1.1 default character set) unless you tell it otherwise. // https://stackoverflow.com/a/8218649 // So encode characters to HTML numeric string references. $content = mb_encode_numericentity($content, [0x80, 0x10FFFF, 0, 0x1FFFFF], 'UTF-8'); // turning off some errors libxml_use_internal_errors(true); if (! $this->dom->loadHTML($content)) { // unclear how we would get here, given that we are trapping libxml errors // @codeCoverageIgnoreStart libxml_clear_errors(); throw new BadMethodCallException('Invalid HTML'); // @codeCoverageIgnoreEnd } // ignore the whitespace. $this->dom->preserveWhiteSpace = false; return $this; } /** * Loads the contents of a file as a string * so that we can work with it. * * @return $this */ public function withFile(string $path) { if (! is_file($path)) { throw new InvalidArgumentException(basename($path) . ' is not a valid file.'); } $content = file_get_contents($path); return $this->withString($content); } /** * Checks to see if the text is found within the result. * * @param string $search * @param string $element */ public function see(?string $search = null, ?string $element = null): bool { // If Element is null, we're just scanning for text if ($element === null) { $content = $this->dom->saveHTML($this->dom->documentElement); return mb_strpos($content, $search) !== false; } $result = $this->doXPath($search, $element); return (bool) $result->length; } /** * Checks to see if the text is NOT found within the result. * * @param string $search */ public function dontSee(?string $search = null, ?string $element = null): bool { return ! $this->see($search, $element); } /** * Checks to see if an element with the matching CSS specifier * is found within the current DOM. */ public function seeElement(string $element): bool { return $this->see(null, $element); } /** * Checks to see if the element is available within the result. */ public function dontSeeElement(string $element): bool { return $this->dontSee(null, $element); } /** * Determines if a link with the specified text is found * within the results. */ public function seeLink(string $text, ?string $details = null): bool { return $this->see($text, 'a' . $details); } /** * Checks for an input named $field with a value of $value. */ public function seeInField(string $field, string $value): bool { $result = $this->doXPath(null, 'input', ["[@value=\"{$value}\"][@name=\"{$field}\"]"]); return (bool) $result->length; } /** * Checks for checkboxes that are currently checked. */ public function seeCheckboxIsChecked(string $element): bool { $result = $this->doXPath(null, 'input' . $element, [ '[@type="checkbox"]', '[@checked="checked"]', ]); return (bool) $result->length; } /** * Search the DOM using an XPath expression. * * @return DOMNodeList|false */ protected function doXPath(?string $search, string $element, array $paths = []) { // Otherwise, grab any elements that match // the selector $selector = $this->parseSelector($element); $path = ''; // By ID if (! empty($selector['id'])) { $path = empty($selector['tag']) ? "id(\"{$selector['id']}\")" : "//{$selector['tag']}[@id=\"{$selector['id']}\"]"; } // By Class elseif (! empty($selector['class'])) { $path = empty($selector['tag']) ? "//*[@class=\"{$selector['class']}\"]" : "//{$selector['tag']}[@class=\"{$selector['class']}\"]"; } // By tag only elseif (! empty($selector['tag'])) { $path = "//{$selector['tag']}"; } if (! empty($selector['attr'])) { foreach ($selector['attr'] as $key => $value) { $path .= "[@{$key}=\"{$value}\"]"; } } // $paths might contain a number of different // ready to go xpath portions to tack on. if (! empty($paths) && is_array($paths)) { foreach ($paths as $extra) { $path .= $extra; } } if ($search !== null) { $path .= "[contains(., \"{$search}\")]"; } $xpath = new DOMXPath($this->dom); return $xpath->query($path); } /** * Look for the a selector in the passed text. * * @return array */ public function parseSelector(string $selector) { $id = null; $class = null; $attr = null; // ID? if (strpos($selector, '#') !== false) { [$tag, $id] = explode('#', $selector); } // Attribute elseif (strpos($selector, '[') !== false && strpos($selector, ']') !== false) { $open = strpos($selector, '['); $close = strpos($selector, ']'); $tag = substr($selector, 0, $open); $text = substr($selector, $open + 1, $close - 2); // We only support a single attribute currently $text = explode(',', $text); $text = trim(array_shift($text)); [$name, $value] = explode('=', $text); $name = trim($name); $value = trim($value); $attr = [$name => trim($value, '] ')]; } // Class? elseif (strpos($selector, '.') !== false) { [$tag, $class] = explode('.', $selector); } // Otherwise, assume the entire string is our tag else { $tag = $selector; } return [ 'tag' => $tag, 'id' => $id, 'class' => $class, 'attr' => $attr, ]; } }