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✏️ Editing: AbstractMethodUnitTest.php Read Only

<?php
/**
 * Base class to use when testing utility methods.
 *
 * @author    Juliette Reinders Folmer <phpcs_nospam@adviesenzo.nl>
 * @copyright 2018-2019 Juliette Reinders Folmer. All rights reserved.
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Tests\Core;

use Exception;
use PHP_CodeSniffer\Files\DummyFile;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Ruleset;
use PHP_CodeSniffer\Tests\ConfigDouble;
use PHPUnit\Framework\TestCase;

abstract class AbstractMethodUnitTest extends TestCase
{

/**
     * The file extension of the test case file (without leading dot).
     *
     * This allows child classes to overrule the default `inc` with, for instance,
     * `js` or `css` when applicable.
     *
     * @var string
     */
    protected static $fileExtension = 'inc';

/**
     * The tab width setting to use when tokenizing the file.
     *
     * This allows for test case files to use a different tab width than the default.
     *
     * @var integer
     */
    protected static $tabWidth = 4;

/**
     * The \PHP_CodeSniffer\Files\File object containing the parsed contents of the test case file.
     *
     * @var \PHP_CodeSniffer\Files\File
     */
    protected static $phpcsFile;

/**
     * Initialize & tokenize \PHP_CodeSniffer\Files\File with code from the test case file.
     *
     * The test case file for a unit test class has to be in the same directory
     * directory and use the same file name as the test class, using the .inc extension.
     *
     * @beforeClass
     *
     * @return void
     */
    public static function initializeFile()
    {
        $_SERVER['argv'] = [];
        $config          = new ConfigDouble();
        // Also set a tab-width to enable testing tab-replaced vs `orig_content`.
        $config->tabWidth = static::$tabWidth;

$ruleset = new Ruleset($config);

// Default to a file with the same name as the test class. Extension is property based.
        $relativeCN     = str_replace(__NAMESPACE__, '', get_called_class());
        $relativePath   = str_replace('\\', DIRECTORY_SEPARATOR, $relativeCN);
        $pathToTestFile = realpath(__DIR__).$relativePath.'.'.static::$fileExtension;

// Make sure the file gets parsed correctly based on the file type.
        $contents  = 'phpcs_input_file: '.$pathToTestFile.PHP_EOL;
        $contents .= file_get_contents($pathToTestFile);

self::$phpcsFile = new DummyFile($contents, $ruleset, $config);
        self::$phpcsFile->parse();

}//end initializeFile()

/**
     * Clean up after finished test by resetting all static properties on the class to their default values.
     *
     * Note: This is a PHPUnit cross-version compatible {@see \PHPUnit\Framework\TestCase::tearDownAfterClass()}
     * method.
     *
     * @afterClass
     *
     * @return void
     */
    public static function reset()
    {
        // Explicitly trigger __destruct() on the ConfigDouble to reset the Config statics.
        // The explicit method call prevents potential stray test-local references to the $config object
        // preventing the destructor from running the clean up (which without stray references would be
        // automagically triggered when `self::$phpcsFile` is reset, but we can't definitively rely on that).
        if (isset(self::$phpcsFile) === true) {
            self::$phpcsFile->config->__destruct();
        }

self::$fileExtension = 'inc';
        self::$tabWidth      = 4;
        self::$phpcsFile     = null;

}//end reset()

/**
     * Test QA: verify that a test case file does not contain any duplicate test markers.
     *
     * When a test case file contains a lot of test cases, it is easy to overlook that a test marker name
     * is already in use.
     * A test wouldn't necessarily fail on this, but would not be testing what is intended to be tested as
     * it would be verifying token properties for the wrong token.
     *
     * This test safeguards against this.
     *
     * @coversNothing
     *
     * @return void
     */
    public function testTestMarkersAreUnique()
    {
        $this->assertTestMarkersAreUnique(self::$phpcsFile);

}//end testTestMarkersAreUnique()

/**
     * Assertion to verify that a test case file does not contain any duplicate test markers.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file to validate.
     *
     * @return void
     */
    public static function assertTestMarkersAreUnique(File $phpcsFile)
    {
        $tokens = $phpcsFile->getTokens();

// Collect all marker comments in the file.
        $seenComments = [];
        for ($i = 0; $i < $phpcsFile->numTokens; $i++) {
            if ($tokens[$i]['code'] !== T_COMMENT) {
                continue;
            }

if (stripos($tokens[$i]['content'], '/* test') !== 0) {
                continue;
            }

$seenComments[] = $tokens[$i]['content'];
        }

self::assertSame(array_unique($seenComments), $seenComments, 'Duplicate test markers found.');

}//end assertTestMarkersAreUnique()

}//end getTargetToken()

/**
     * Get the token pointer for a target token based on a specific comment found on the line before.
     *
     * Note: the test delimiter comment MUST start with "/* test" to allow this function to
     * distinguish between comments used *in* a test and test delimiters.
     *
     * @param \PHP_CodeSniffer\Files\File  $phpcsFile     The file to find the token in.
     * @param string                       $commentString The delimiter comment to look for.
     * @param int|string|array<int|string> $tokenType     The type of token(s) to look for.
     * @param string                       $tokenContent  Optional. The token content for the target token.
     *
     * @return int
     *
     * @throws \Exception When the test delimiter comment is not found.
     * @throws \Exception When the test target token is not found.
     */
    public static function getTargetTokenFromFile(File $phpcsFile, $commentString, $tokenType, $tokenContent=null)
    {
        $start   = ($phpcsFile->numTokens - 1);
        $comment = $phpcsFile->findPrevious(
            T_COMMENT,
            $start,
            null,
            false,
            $commentString
        );

if ($comment === false) {
            throw new Exception(
                sprintf('Failed to find the test marker: %s in test case file %s', $commentString, $phpcsFile->getFilename())
            );
        }

$tokens = $phpcsFile->getTokens();
        $end    = ($start + 1);

// Limit the token finding to between this and the next delimiter comment.
        for ($i = ($comment + 1); $i < $end; $i++) {
            if ($tokens[$i]['code'] !== T_COMMENT) {
                continue;
            }

if (stripos($tokens[$i]['content'], '/* test') === 0) {
                $end = $i;
                break;
            }
        }

$target = $phpcsFile->findNext(
            $tokenType,
            ($comment + 1),
            $end,
            false,
            $tokenContent
        );

if ($target === false) {
            $msg = 'Failed to find test target token for comment string: '.$commentString;
            if ($tokenContent !== null) {
                $msg .= ' with token content: '.$tokenContent;
            }

throw new Exception($msg);
        }

return $target;

}//end getTargetTokenFromFile()

/**
     * Helper method to tell PHPUnit to expect a PHPCS RuntimeException in a PHPUnit cross-version
     * compatible manner.
     *
     * @param string $message The expected exception message.
     *
     * @return void
     */
    public function expectRunTimeException($message)
    {
        $exception = 'PHP_CodeSniffer\Exceptions\RuntimeException';

if (method_exists($this, 'expectException') === true) {
            // PHPUnit 5+.
            $this->expectException($exception);
            $this->expectExceptionMessage($message);
        } else {
            // PHPUnit 4.
            $this->setExpectedException($exception, $message);
        }

}//end expectRunTimeException()

}//end class