class_docstr: Test decoding for ArrayDecoder
class_docstr_tok: ["Test","decoding","for","ArrayDecoder"]
code: def setUp(self):
      self.samplerate, self.channels, self.blocksize = None, None, None
      self.start = 0
      self.duration = None
      self.array_duration = 8
      self.expected_duration = self.array_duration
      self.expected_is_segment = False
  
imports: from __future__ import division
  from timeside.plugins.decoder.array import ArrayDecoder
  from unit_timeside import *
  import numpy
label_desc: Use image node_id 1 for calling the TestDecoding obj's underlying member method code with example usage: obj.setUp() without return types