class_docstr: Test the function pointers that are expected to fail on
  Mac OS X without the additional entry statement in their definitions
  in fblas_l1.pyf.src. 
class_docstr_tok: ["Test","the","function","pointers","that","are","expected","to","fail","on","Mac","OS","X","without","the","additional","entry","statement","in","their","definitions","in","fblas_l1.pyf.src","."]
code: def test_double_args(self):
      x = np.array([5.0, -3, -0.5], np.float64)
      y = np.array([2, 1, 0.5], np.float64)
  
      assert_allclose(blas._test_dasum(x), 8.5, 10)
      assert_allclose(blas._test_ddot(x, y), 6.75, 10)
      assert_allclose(blas._test_dnrm2(x), 5.85234975815, 10)
  
      assert_allclose(blas._test_dasum(x[::2]), 5.5, 10)
      assert_allclose(blas._test_ddot(x[::2], y[::2]), 9.75, 10)
      assert_allclose(blas._test_dnrm2(x[::2]), 5.0249376297, 10)
  
      assert_equal(blas._test_idamax(x), 1)
  
file_path: catboost/contrib/python/scipy/py3/scipy/linalg/tests/test_cython_blas.py
imports: import numpy
  from numpy.testing import assert_allclose, assert_equal
  import scipy.linalg.cython_blas
label_desc: Use image node_id 2 for calling the TestWfuncPointers obj's underlying member method code with example usage: obj.test_double_args() without return types