Add slash normalization

Fixes #4

Includes tests.

Author: jrfnl

src/Parser/SniffParser.php

@@ -27,6 +27,7 @@ class SniffParser
 {
     public function parse(string $phpFilePath, SourceLocator $projectSourceLocator): Sniff
     {
+        $phpFilePath = $this->normalizeSlashes($phpFilePath);
         $astLocator = (new BetterReflection())->astLocator();
         $reflector = new ClassReflector(
             new AggregateSourceLocator([
@@ -211,4 +212,16 @@ private function getUrls(ReflectionClass $classInfo, array $xmlUrls): UrlList
 
         return new UrlList(array_merge($urls, $xmlUrls));
     }
+
+    /**
+     * Normalizes all slashes in a file path to forward slashes.
+     *
+     * @param string $path File path.
+     *
+     * @return string The file path with normalized slashes.
+     */
+    private function normalizeSlashes($path)
+    {
+        return str_replace('\\', '/', $path);
+    }
 }

tests/Parser/SniffParserTest.php

@@ -19,6 +19,7 @@ class SniffParserTest extends TestCase
 {
     private const PHP_FILE_PATH = 'var/tests/src/Standard/Sniffs/Category/MySniff.php';
     private const XML_FILE_PATH = 'var/tests/src/Standard/Docs/Category/MyStandard.xml';
+    private const PHP_FILE_PATH_MIXED_SLASHES = 'var\tests\src\Standard/Sniffs/Category\MySniff.php';
 
     private SniffParser $parser;
     private Locator $astLocator;
@@ -246,6 +247,53 @@ class MySniff {}
         );
     }
 
+    /** @test */
+    public function parse_WithWindowsSlashesInPhpPath()
+    {
+        $content = '<?php
+        namespace Standard\Sniffs\Category;
+        /**
+         * Summary
+         *
+         * Description
+         *
+         * @since 1.0.0
+         */
+        class MySniff {}
+        ';
+
+        (new Filesystem())->dumpFile(self::PHP_FILE_PATH, $content);
+        $doc = $this->parser->parse(str_replace('/', '\\', self::PHP_FILE_PATH), new StringSourceLocator($content, $this->astLocator));
+        self::assertEquals(
+            'Standard.Category.My',
+            $doc->getCode()
+        );
+    }
+
+    /** @test */
+    public function parse_WithMixedSlashesInPhpPath()
+    {
+        $content = '<?php
+        namespace Standard\Sniffs\Category;
+        /**
+         * Summary
+         *
+         * Description
+         *
+         * @since 1.0.0
+         */
+        class MySniff {}
+        ';
+
+        (new Filesystem())->dumpFile(self::PHP_FILE_PATH, $content);
+
+        $doc = $this->parser->parse(self::PHP_FILE_PATH_MIXED_SLASHES, new StringSourceLocator($content, $this->astLocator));
+        self::assertEquals(
+            'Standard.Category.My',
+            $doc->getCode()
+        );
+    }
+
     /** @test */
     public function parse_WithInvalidPhpPath_ThrowException()
     {