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<?php
/**
* Tests for diff generation.
*
* @author Juliette Reinders Folmer <[email protected]>
* @copyright 2024 Juliette Reinders Folmer. All rights reserved.
* @license https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Tests\Core\Fixer;
use PHP_CodeSniffer\Files\LocalFile;
use PHP_CodeSniffer\Ruleset;
use PHP_CodeSniffer\Tests\ConfigDouble;
use PHPUnit\Framework\TestCase;
/**
* Tests for diff generation.
*
* Note: these tests are specifically about the Fixer::generateDiff() method and do not
* test running the fixer itself, nor generating a diff based on a fixer run.
*
* @covers PHP_CodeSniffer\Fixer::generateDiff
*/
final class GenerateDiffTest extends TestCase
{
/**
* A \PHP_CodeSniffer\Files\File object to compare the files against.
*
* @var \PHP_CodeSniffer\Files\LocalFile
*/
private static $phpcsFile;
/**
* Initialize an \PHP_CodeSniffer\Files\File object with code.
*
* Things to take note of in the code snippet used for these tests:
* - Line endings are \n.
* - Tab indent.
* - Trailing whitespace.
*
* Also note that the Config object is deliberately created without a `tabWidth` setting to
* prevent doing tab replacement when parsing the file. This is to allow for testing a
* diff with tabs vs spaces (which wouldn't yield a diff if tabs had already been replaced).
*
* @beforeClass
*
* @return void
*/
public static function initializeFile()
{
$config = new ConfigDouble();
$ruleset = new Ruleset($config);
self::$phpcsFile = new LocalFile(__DIR__.'/Fixtures/GenerateDiffTest.inc', $ruleset, $config);
self::$phpcsFile->parse();
self::$phpcsFile->fixer->startFile(self::$phpcsFile);
}//end initializeFile()
/**
* Test generating a diff on the file object itself.
*
* @return void
*/
public function testGenerateDiffNoFile()
{
$diff = self::$phpcsFile->fixer->generateDiff(null, false);
$this->assertSame('', $diff);
}//end testGenerateDiffNoFile()
/**
* Test generating a diff between a PHPCS File object and a file on disk.
*
* @param string $filePath The path to the file to compare the File object against.
*
* @dataProvider dataGenerateDiff
*
* @return void
*/
public function testGenerateDiff($filePath)
{
$diff = self::$phpcsFile->fixer->generateDiff($filePath, false);
// Allow for the tests to pass on Windows too.
$diff = str_replace('--- tests\Core\Fixer/', '--- tests/Core/Fixer/', $diff);
$expectedDiffFile = str_replace('.inc', '.diff', $filePath);
$this->assertStringEqualsFile($expectedDiffFile, $diff);
}//end testGenerateDiff()
/**
* Data provider.
*
* @see testGenerateDiff()
*
* @return array<string, array<string, string>>
*/
public static function dataGenerateDiff()
{
return [
'no difference' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-NoDiff.inc',
],
'line removed' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-LineRemoved.inc',
],
'line added' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-LineAdded.inc',
],
'var name changed' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-VarNameChanged.inc',
],
'trailing whitespace removed' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-NoTrailingWhitespace.inc',
],
'tab replaced with spaces' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-TabsToSpaces.inc',
],
'blank lines at start of file' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-BlankLinesAtStart.inc',
],
'whitespace diff at start of file' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-WhiteSpaceAtStart.inc',
],
'blank lines at end of file' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-BlankLinesAtEnd.inc',
],
'whitespace diff at end of file' => [
'filePath' => __DIR__.'/Fixtures/GenerateDiffTest-WhiteSpaceAtEnd.inc',
],
];
}//end dataGenerateDiff()
/**
* Test generating a diff between a PHPCS File object and a file on disk and colourizing the output.
*
* @return void
*/
public function testGenerateDiffColoured()
{
$expected = "\033[31m--- tests/Core/Fixer/Fixtures/GenerateDiffTest-VarNameChanged.inc\033[0m".PHP_EOL;
$expected .= "\033[32m+++ PHP_CodeSniffer\033[0m".PHP_EOL;
$expected .= '@@ -1,7 +1,7 @@'.PHP_EOL;
$expected .= ' <?php'.PHP_EOL;
$expected .= ' // Comment with 2 spaces trailing whitespace. '.PHP_EOL;
$expected .= "\033[31m".'-$rav = FALSE;'."\033[0m".PHP_EOL;
$expected .= "\033[32m".'+$var = FALSE;'."\033[0m".PHP_EOL;
$expected .= ' '.PHP_EOL;
$expected .= "\033[31m".'-if ($rav) {'."\033[0m".PHP_EOL;
$expected .= "\033[32m".'+if ($var) {'."\033[0m".PHP_EOL;
$expected .= ' echo \'This line is tab indented\';'.PHP_EOL;
$expected .= ' }';
$filePath = __DIR__.'/Fixtures/GenerateDiffTest-VarNameChanged.inc';
$diff = self::$phpcsFile->fixer->generateDiff($filePath);
// Allow for the tests to pass on Windows too.
$diff = str_replace('--- tests\Core\Fixer/', '--- tests/Core/Fixer/', $diff);
$this->assertSame($expected, $diff);
}//end testGenerateDiffColoured()
/**
* Test generating a diff between a PHPCS File object using *nix line endings and a file on disk
* using Windows line endings.
*
* The point of this test is to verify that all lines are marked as having a difference.
* The actual lines endings used in the diff shown to the end-user are not relevant for this
* test.
* As the "diff" command is finicky with what type of line endings are used when the only
* difference on a line is the line ending, the test normalizes the line endings of the
* received diff before testing it.
*
* @return void
*/
public function testGenerateDiffDifferentLineEndings()
{
// By the looks of it, if the only diff between two files is line endings, the
// diff generated by the *nix "diff" command will always contain *nix line endings.
$expected = '--- tests/Core/Fixer/Fixtures/GenerateDiffTest-WindowsLineEndings.inc'."\n";
$expected .= '+++ PHP_CodeSniffer'."\n";
$expected .= '@@ -1,7 +1,7 @@'."\n";
$expected .= '-<?php'."\n";
$expected .= '-// Comment with 2 spaces trailing whitespace. '."\n";
$expected .= '-$var = FALSE;'."\n";
$expected .= '-'."\n";
$expected .= '-if ($var) {'."\n";
$expected .= '- echo \'This line is tab indented\';'."\n";
$expected .= '-}'."\n";
$expected .= '+<?php'."\n";
$expected .= '+// Comment with 2 spaces trailing whitespace. '."\n";
$expected .= '+$var = FALSE;'."\n";
$expected .= '+'."\n";
$expected .= '+if ($var) {'."\n";
$expected .= '+ echo \'This line is tab indented\';'."\n";
$expected .= '+}'."\n";
$filePath = __DIR__.'/Fixtures/GenerateDiffTest-WindowsLineEndings.inc';
$diff = self::$phpcsFile->fixer->generateDiff($filePath, false);
// Allow for the tests to pass on Windows too.
$diff = str_replace('--- tests\Core\Fixer/', '--- tests/Core/Fixer/', $diff);
// Normalize line endings of the diff.
$diff = preg_replace('`\R`', "\n", $diff);
$this->assertSame($expected, $diff);
}//end testGenerateDiffDifferentLineEndings()
}//end class