code: def test_atanh():
      a = atanh(interval(-0.5, 0.5))
      assert a.start == np.arctanh(-0.5)
      assert a.end == np.arctanh(0.5)
  
      a = atanh(interval(0, 3))
      assert a.is_valid is None
  
      a = atanh(interval(-3, -2))
      assert a.is_valid is False
  
      a = atanh(0.5)
      assert a.start == np.arctanh(0.5)
      assert a.end == np.arctanh(0.5)
  
      a = atanh(1.5)
      assert a.is_valid is False
  
imports: from sympy.external import import_module
  from sympy.plotting.intervalmath import Abs, acos, acosh, And, asin, asinh, atan, atanh, ceil, cos, cosh, exp, floor, imax, imin, interval, log, log10, Or, sin, sinh, sqrt, tan, tanh
label_desc: Use image node_id 21 for calling a global function with example usage: test_atanh() without return types