message: Add test case for input shape of tf.roll
diff: @@ -20,8 +20,10 @@ from __future__ import print_function
  import numpy as np
  from tensorflow.python.framework import constant_op
  +from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import test_util
  +from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.ops import manip_ops
  from tensorflow.python.platform import test as test_lib
  @@ -98,14 +100,20 @@ class RollTest(test_util.TensorFlowTestCase):
  manip_ops.roll(np.random.randint(-100, 100, (4, 4)).astype(np.int32),
  3, -10).eval()
  + def testInvalidInputShape(self):
  + # The input should be 1-D or higher, checked in shape function.
  + with self.assertRaisesRegexp(ValueError, "Shape must be at least rank 1 but is rank 0"):
  + roll = manip_ops.roll(7, 1, 0)
  +
  def testRollInputMustVectorHigherRaises(self):
  - tensor = 7
  + # The input should be 1-D or higher, checked is done in kernel.
  + tensor = array_ops.placeholder(dtype=dtypes.int32)
  shift = 1
  axis = 0
  with self.test_session():
  with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
  "input must be 1-D or higher"):
  - manip_ops.roll(tensor, shift, axis).eval()
  + manip_ops.roll(tensor, shift, axis).eval(feed_dict={tensor: 7})
  def testRollAxisMustBeScalarOrVectorRaises(self):
  tensor = [[1, 2], [3, 4]]
  