code: def test_bspline_degree_1(self, xp, scp):
      t = xp.asarray([0, 1, 2, 3, 4])
      c = xp.asarray([1, 2, 3])
      k = 1
  
      b = scp.interpolate.BSpline(t, c, k)
      x = xp.linspace(1, 3, 50)
      return b(x)
  
imports: import pytest
  import inspect
  from cupy import testing
  from cupy_backends.cuda.api import driver
  from cupy_backends.cuda.api import runtime
  import numpy
  import cupyx.scipy.interpolate
label_desc: Use image node_id 4 for calling the TestBSpline obj's underlying member method code with example usage: obj.test_bspline_degree_1(xp, scp) and returns: b