docstr: Test that the hooks are constructed correctly.
code: def test_constructors(self) -> None:
      """
      Test that the hooks are constructed correctly.
      """
      config = {}
      self.constructor_test_helper(
          config=config,
          hook_type=ProgressBarHook,
          hook_registry_name="progress_bar",
      )
  
file_path: ClassyVision/test/manual/hooks_progress_bar_hook_test.py
imports: import unittest
  import unittest.mock
  import progressbar
  from classy_vision.hooks import ProgressBarHook
  from test.generic.config_utils import get_test_classy_task
  from test.generic.hook_test_utils import HookTestBase
label_desc: Use image node_id 1 for calling the TestProgressBarHook obj's underlying member method code with example usage: obj.test_constructors() without return types