add to be backed enum expectation

src/Expectations/OppositeExpectation.php

@@ -485,4 +485,50 @@ final class OppositeExpectation
     {
         return $this->toHaveMethod('__destruct');
     }
+
+    /**
+     * Asserts that the given expectation target is not a backed enum of given type.
+     */
+    private function toBeBackedEnum(string $backingType): ArchExpectation
+    {
+        return Targeted::make(
+            $this->original,
+            fn (ObjectDescription $object): bool => (new \ReflectionEnum($object->name))->isBacked()
+                && (string)(new \ReflectionEnum($object->name))->getBackingType() !== $backingType,
+            'not to be ' . $backingType . ' backed enum',
+            FileLineFinder::where(fn (string $line): bool => str_contains($line, 'class')),
+        );
+    }
+
+    /**
+     * Asserts that the given expectation targets are not string backed enums.
+     */
+    public function toBeStringBackedEnums(): ArchExpectation
+    {
+        return $this->toBeStringBackedEnum();
+    }
+
+    /**
+     * Asserts that the given expectation targets are not int backed enums.
+     */
+    public function toBeIntBackedEnums(): ArchExpectation
+    {
+        return $this->toBeIntBackedEnum();
+    }
+
+    /**
+     * Asserts that the given expectation target is not a string backed enum.
+     */
+    public function toBeStringBackedEnum(): ArchExpectation
+    {
+        return $this->toBeBackedEnum('string');
+    }
+
+    /**
+     * Asserts that the given expectation target is not an int backed enum.
+     */
+    public function toBeIntBackedEnum(): ArchExpectation
+    {
+        return $this->toBeBackedEnum('int');
+    }
 }