code: def test_input_with_all_same_values(self):
      pb = self.histogram("twelven", [12, 12, 12])
      buckets = tensor_util.make_ndarray(pb.value[0].tensor)
      np.testing.assert_allclose(buckets, np.array([[11.5, 12.5, 3]]))
  
imports: import glob
  import os
  import numpy
  import tensorflow
  from tensorboard.compat import tf2
  from tensorboard.compat.proto import summary_pb2
  from tensorboard.plugins.histogram import metadata
  from tensorboard.plugins.histogram import summary
  from tensorboard.util import tensor_util
label_desc: Use image node_id 7 for calling the SummaryBaseTest obj's underlying member method code with example usage: obj.test_input_with_all_same_values() without return types