code: def test_get_category(patch_vsphere_sdk_provider):
      vsp = mock_vsphere_sdk_provider()
      vsp.vsphere_sdk_client.tagging.Category.list.return_value = [
          "category_1"
      ]
  
      mock_category = MagicMock()
      mock_category.name = "ray"
      vsp.vsphere_sdk_client.tagging.Category.get.return_value = (
          mock_category
      )
      category = vsp.get_category()
      assert category == "category_1"
      mock_category.name = "default"
      category = vsp.get_category()
      assert category is None
  
file_path: ray/python/ray/tests/vsphere/test_vsphere_sdk_provider.py
imports: import pytest
  from unittest.mock import MagicMock, patch
  from ray.autoscaler._private.vsphere.vsphere_sdk_provider import VsphereSdkProvider, Constants, HardPower
label_desc: Use image node_id 11 for calling a global function with example usage: test_get_category(patch_vsphere_sdk_provider) without return types