Fix scale subresource operations for ReplicaSet

- Override create() and update() in K8sScale to use REPLACE_OP (PUT)
  instead of CREATE_OP (POST) since scale subresources only support PUT
- Update ReplicaSetTest to use the correct scale() pattern that matches
  StatefulSetTest implementation
- Scale operations now properly update the replica count on the cluster

Fixes integration test scaling errors where scale API was returning 404
for POST operations. Scale subresources require PUT to the resource's
scale path (e.g., /apis/apps/v1/namespaces/default/replicasets/{name}/scale).

Generated with Claude Code

Co-Authored-By: Claude <[email protected]>

Author: cuppett

src/Kinds/K8sScale.php

@@ -87,4 +87,55 @@ public function refreshOriginal(array $query = ['pretty' => 1])
 
         return parent::refreshOriginal($query);
     }
+
+    /**
+     * Create the scale resource.
+     * Scale subresources should use replace (PUT) operations, not create (POST).
+     * Scale subresources don't support POST, so we use PUT to the scale subresource path.
+     *
+     * @param  array  $query
+     * @return \RenokiCo\PhpK8s\Kinds\K8sResource
+     *
+     * @throws \RenokiCo\PhpK8s\Exceptions\KubernetesAPIException
+     */
+    public function create(array $query = ['pretty' => 1])
+    {
+        return $this->cluster
+            ->setResourceClass(get_class($this))
+            ->runOperation(
+                \RenokiCo\PhpK8s\KubernetesCluster::REPLACE_OP,
+                $this->resourcePath(),
+                $this->toJsonPayload(),
+                $query
+            );
+    }
+
+    /**
+     * Update the scale resource.
+     * This is the correct operation for scale subresources.
+     * Scale is updated via PUT to the scale subresource path.
+     *
+     * @param  array  $query
+     * @return bool
+     *
+     * @throws \RenokiCo\PhpK8s\Exceptions\KubernetesAPIException
+     */
+    public function update(array $query = ['pretty' => 1]): bool
+    {
+        $this->refreshOriginal();
+        $this->refreshResourceVersion();
+
+        $instance = $this->cluster
+            ->setResourceClass(get_class($this))
+            ->runOperation(
+                \RenokiCo\PhpK8s\KubernetesCluster::REPLACE_OP,
+                $this->resourcePath(),
+                $this->toJsonPayload(),
+                $query
+            );
+
+        $this->syncWith($instance->toArray());
+
+        return true;
+    }
 }

tests/ReplicaSetTest.php

@@ -183,26 +183,19 @@ public function runScalingTests()
 
         $this->assertTrue($rs->isSynced());
 
-        $scaler = $rs->scaler();
-        $scaler->setReplicas(2);
-
-        $this->assertEquals(2, $scaler->getReplicas());
-
-        $scaler->create();
-
-        sleep(1);
+        $scaler = $rs->scale(2);
 
         $this->assertTrue($rs->isSynced());
-        $this->assertEquals(2, $rs->getReplicas());
 
-        $rs->refresh();
+        while ($rs->getReadyReplicasCount() < 2 || $scaler->getReplicas() < 2) {
+            $scaler->refresh();
+            $rs->refresh();
 
-        while ($rs->getReadyReplicasCount() !== 2) {
             sleep(1);
-            $rs->refresh();
         }
 
         $this->assertEquals(2, $rs->getReadyReplicasCount());
+        $this->assertEquals(2, $scaler->getReplicas());
     }
 
     public function runUpdateTests()