docstr: Test that the op handles tensors with unknown shape.
docstr_tok: ["Test","that","the","op","handles","tensors","with","unknown","shape","."]
code: def test_supports_tensors_with_unknown_shape(self):
      """Test that the op handles tensors with unknown shape."""
      data = array_ops.placeholder_with_default(
          constant_op.constant(
              [
                  [[True, True, False], [True, False, False]],
                  [[False, False, True], [True, False, True]],
              ]
          ),
          shape=None,
      )
      result = create_feature_bitmask_op.create_feature_bitmask(data)
  
      expected_result = constant_op.constant([[6, 4], [1, 5]])
  
      self.assertAllEqual(expected_result, result)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops import create_feature_bitmask_op
label_desc: Use image node_id 8 for calling the CreateFeatureBitmaskOpTest obj's underlying member method code with example usage: obj.test_supports_tensors_with_unknown_shape() without return types