Add toHaveMethod arch expectation

src/Expectation.php

@@ -501,6 +501,19 @@ final class Expectation
         );
     }
 
+    /**
+     * Asserts that the given expectation target have a specific method.
+     */
+    public function toHaveMethod(string $method): ArchExpectation
+    {
+        return Targeted::make(
+            $this,
+            fn (ObjectDescription $object): bool => $object->reflectionClass->hasMethod($method),
+            'to have method',
+            FileLineFinder::where(fn (string $line): bool => str_contains($line, 'class')),
+        );
+    }
+
     /**
      * Asserts that the given expectation target is enum.
      */