code: def test_default_value(self) -> None:
      class Foo(HasProps):
          x = bcpd.AngleSpec(default=14)
  
      a = Foo()
  
      assert a.x == 14
      assert a.x_units == "rad"
  
imports: from __future__ import annotations
  import pytest
  import datetime
  import warnings
  from copy import copy
  import numpy
  import pandas
  from bokeh.core.has_props import HasProps, Local
  from bokeh.core.property.vectorization import Field, Value, field, value
  from tests.support.util.api import verify_all
  import bokeh.core.property.dataspec
label_desc: Use image node_id 1 for calling the Test_AngleSpec obj's underlying member method code with example usage: obj.test_default_value() without return types