Only return the class if it exists

src/Support/ResourceResolver.php

@@ -24,6 +24,6 @@ public function resolve(string $model): ?string
             throw ResourceNotFoundException::for($resourceClass);
         }
 
-        return $resourceClass;
+        return class_exists($resourceClass) ? $resourceClass : null;
     }
 }

tests/Support/ResourceResolverTest.php

@@ -37,4 +37,12 @@ public function it_resolves_with_suffix_enabled()
 
         $this->assertEquals(ProductResource::class, $resourceClass);
     }
+
+    /** @test */
+    public function it_returns_null_if_the_class_does_not_exist()
+    {
+        $resourceClass = $this->resolver->resolve('App\\Models\\Invalid');
+
+        $this->assertNull($resourceClass);
+    }
 }