Mabe\Enum\Cl\enum_exists should except EmulatedUnitEnum

Author: marc-mabe

src/functions.php

@@ -70,9 +70,8 @@ function enum_exists(string $enum, bool $autoload = true) : bool
         }
 
         return \class_exists($enum, $autoload) && (
-            \is_a($enum, __NAMESPACE__ . '\\IntBackedEnum', true)
-            || \is_a($enum, __NAMESPACE__ . '\\StringBackedEnum', true)
+            \is_a($enum, __NAMESPACE__ . '\\EmulatedUnitEnum', true)
+            || \is_a($enum, __NAMESPACE__ . '\\EmulatedBackedEnum', true)
         );
     }
 }
-

src/stubs/BackedEnum.php

@@ -8,7 +8,7 @@
  * @link http://github.com/marc-mabe/php-enum-cl for the canonical source repository
  */
 interface BackedEnum extends UnitEnum {
-    //public string|int $value;
+    //public readonly string|int $value;
 
     /**
      * @param string|int $value

src/stubs/UnitEnum.php

@@ -8,8 +8,8 @@
  * @link http://github.com/marc-mabe/php-enum-cl for the canonical source repository
  */
 interface UnitEnum {
-    //public string $name;
-    
+    //public readonly string $name;
+
     /**
      * @return static[]
      * @phpstan-return array<int, static>

tests/EnumExistsTest.php

@@ -15,6 +15,16 @@ public function testUnitEnumNative()
         static::assertTrue(enum_exists(__FUNCTION__));
     }
 
+    public function testUnitEnumEmulated()
+    {
+        if (PHP_VERSION_ID >= 80100) {
+            $this->markTestSkipped('This test is for PHP < 8.1 only');
+        }
+
+        eval('final class ' . __FUNCTION__ . ' extends Mabe\Enum\Cl\EmulatedUnitEnum {}');
+        static::assertTrue(enum_exists(__FUNCTION__));
+    }
+
     public function testIntBackedEnumEmulated()
     {
         if (PHP_VERSION_ID >= 80100) {