code: def test_context(self):
      ctx = context.RequestContext()
      environ = {}
      context.set_in_environ(environ, ctx)
      self.assertEqual(context.from_environ(environ), ctx)
  
imports: import textwrap
  from tensorboard import context
  from tensorboard import plugin_util
  from tensorboard import test
  from tensorboard.backend import experiment_id
label_desc: Use image node_id 1 for calling the ContextTest obj's underlying member method code with example usage: obj.test_context() without return types