code: def test_providers_manager_register_plugins(self):
      providers_manager = ProvidersManager()
      providers_manager._provider_dict[
          "apache-airflow-providers-apache-hive"
      ] = ProviderInfo(
          version="0.0.1",
          data={
              "plugins": [
                  {
                      "name": "plugin1",
                      "plugin-class": "airflow.providers.apache.hive.plugins.hive.HivePlugin",
                  }
              ]
          },
          package_or_source="package",
      )
      providers_manager._discover_plugins()
      assert len(providers_manager._plugins_set) == 1
      assert providers_manager._plugins_set.pop() == PluginInfo(
          name="plugin1",
          plugin_class="airflow.providers.apache.hive.plugins.hive.HivePlugin",
          provider_name="apache-airflow-providers-apache-hive",
      )
  
imports: from __future__ import annotations
  import logging
  import re
  import sys
  from unittest.mock import patch
  import pytest
  from flask_appbuilder.fieldwidgets import BS3TextFieldWidget
  from flask_babel import lazy_gettext
  from wtforms import BooleanField, Field, StringField
  from airflow.exceptions import AirflowOptionalProviderFeatureException
  from airflow.providers_manager import HookClassProvider, LazyDictWithCache, PluginInfo, ProviderInfo, ProvidersManager
label_desc: Use image node_id 9 for calling the TestProviderManager obj's underlying member method code with example usage: obj.test_providers_manager_register_plugins() without return types