chore: move test to separate file

Author: SamMousa

stubs/ReflectionClass.stub

@@ -50,7 +50,9 @@ class ReflectionClass
     }
 
     /**
-     * @phpstan-assert-if-true class-string<UnitEnum> $this->getName()
+     * @phpstan-assert-if-true class-string<\UnitEnum> $this->name
+     * @phpstan-assert-if-true ReflectionClass<\UnitEnum> $this
+	 * @phpstan-assert-if-false !class-string<\UnitEnum> $this->name
      */
     public function isEnum(): bool
     {

tests/PHPStan/Analyser/NodeScopeResolverTest.php

@@ -238,6 +238,7 @@ private static function findTestFiles(): iterable
 		yield __DIR__ . '/../Rules/Methods/data/bug-4801.php';
 		yield __DIR__ . '/../Rules/Arrays/data/narrow-superglobal.php';
 		yield __DIR__ . '/../Rules/Methods/data/bug-12927.php';
+		yield __DIR__ . '/data/reflectionclass-isEnum.php';
 	}
 
 	/**

tests/PHPStan/Analyser/data/enum-reflection-php81.php

@@ -2,10 +2,7 @@
 
 namespace EnumReflection81;
 
-use ReflectionClass;
 use ReflectionEnum;
-use ReflectionEnumBackedCase;
-use ReflectionEnumUnitCase;
 use function PHPStan\Testing\assertType;
 
 enum Foo: int
@@ -22,16 +19,3 @@ function testNarrowGetBackingTypeAfterIsBacked() {
 		assertType('ReflectionType', $r->getBackingType());
 	}
 }
-
-function testNarrowClassAfterIsEnum() {
-	/**
-	 * @var class-string
-	 */
-	$classString = Foo::class;
-	$r = new ReflectionClass($classString);
-	assertType('class-string', $classString);
-	if ($r->isEnum()) {
-		assertType('class-string<\UnitEnum>', $classString);
-	}
-}
-

tests/PHPStan/Analyser/data/reflectionclass-isEnum.php

@@ -0,0 +1,19 @@
+<?php // lint >= 8.1
+
+namespace ReflectionClassIsEnum;
+
+use ReflectionClass;
+use function PHPStan\Testing\assertType;
+
+/**
+ * @param class-string $class
+ */
+function testNarrowClassAfterIsEnum(string $class): void {
+	$r = new ReflectionClass($class);
+	assertType('class-string<object>', $r->name);
+	if ($r->isEnum()) {
+		assertType('ReflectionClass<\UnitEnum>', $r);
+		assertType('class-string<\UnitEnum>', $r->name);
+	}
+}
+