Fix FQ usages (#601)

Fix FQ usages for exposed symbols

Author: theofidry

src/Symbol/SymbolRegistry.php

@@ -40,7 +40,10 @@ public static function create(
     ): self {
         return new self(
             array_unique(
-                array_map('strtolower', $names),
+                array_map(
+                    static fn (string $name) => strtolower(ltrim($name, '\\')),
+                    $names,
+                ),
             ),
             array_unique($regexes),
             false,
@@ -61,7 +64,9 @@ public static function createForConstants(
         return new self(
             array_unique(
                 array_map(
-                    static fn (string $name) => self::lowerCaseConstantName($name),
+                    static fn (string $name) => self::lowerCaseConstantName(
+                        ltrim($name, '\\'),
+                    ),
                     $names,
                 ),
             ),

tests/Symbol/SymbolRegistryTest.php

@@ -118,6 +118,18 @@ private static function provideNames(): iterable
             true,
         ];
 
+        yield 'FQ namespaced name registered; match' => [
+            ['\PHPUnit\TestCase'],
+            'PHPUnit\TestCase',
+            true,
+        ];
+
+        yield 'namespaced name registered; (FQ) match' => [
+            ['PHPUnit\TestCase'],
+            '\PHPUnit\TestCase',
+            true,
+        ];
+
         yield 'namespaced name registered; different case' => [
             ['PHPUnit\TestCase'],
             'PHPUNIT\TESTCASE',