message: Add test cases for int64 support of `axis` (`Tidx`) for ConcatV2
diff: @@ -606,6 +606,17 @@ class ConcatOpTest(test.TestCase):
  inp_tensors_placeholders, -2, output_shape=[2, 3],
  gather_indexes=[2, 0], feed_dict=feed_dict)
  + def testConcatAxisType(self):
  + for dtype in [dtypes.int32, dtypes.int64]:
  + with self.test_session(use_gpu=True):
  + t1 = [[1, 2, 3], [4, 5, 6]]
  + t2 = [[7, 8, 9], [10, 11, 12]]
  +
  + c = gen_array_ops._concat_v2([t1, t2],
  + constant_op.constant(1, dtype=dtype))
  + self.assertEqual([2, 6], c.get_shape().as_list())
  + output = c.eval()
  + self.assertAllEqual([[1, 2, 3, 7, 8, 9], [4, 5, 6, 10, 11, 12]], output)
  class ConcatOffsetTest(test.TestCase):
  