class_docstr: Tests for helper functions.
class_docstr_tok: ["Tests","for","helper","functions","."]
code: def testJoinedArray(self):
      num_dims = 3
      truth_dim_zero = [["000100", "001101"], ["010110", "011111"]]
      truth_dim_one = [["000010", "001011"], ["100110", "101111"]]
      truth_dim_two = [["000001", "010011"], ["100101", "110111"]]
      output_array_dim_zero = _joined_array(num_dims, reduce_dim=0)
      output_array_dim_one = _joined_array(num_dims, reduce_dim=1)
      output_array_dim_two = _joined_array(num_dims, reduce_dim=2)
      self.assertAllEqualUnicode(truth_dim_zero, output_array_dim_zero)
      self.assertAllEqualUnicode(truth_dim_one, output_array_dim_one)
      self.assertAllEqualUnicode(truth_dim_two, output_array_dim_two)
  
imports: import itertools
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the ReduceJoinTestHelperTest obj's underlying member method code with example usage: obj.testJoinedArray() without return types