code: def test_init(self) -> None:
      with pytest.raises(TypeError):
          bcpn.Interval()
  
      with pytest.raises(ValueError):
          bcpn.Interval(Int, 0.0, 1.0)
  
imports: from __future__ import annotations
  import pytest
  from bokeh.core.properties import Float, Int
  from tests.support.util.api import verify_all
  from _util_property import _TestHasProps, _TestModel
  import bokeh.core.property.numeric
label_desc: Use image node_id 1 for calling the Test_Interval obj's underlying member method code with example usage: obj.test_init() without return types