docstr: Test Process function 3D array
docstr_tok: ["Test","Process","function","3D","array"]
code: def testProcess3D(self):
      "Test Process function 3D array"
      print(self.typeStr, "... ", end=" ", file=sys.stderr)
      process = Flat.__dict__[self.typeStr + "Process"]
      pack_output = b""
      for i in range(24):
          pack_output += struct.pack(self.typeCode, i)
      x = np.frombuffer(pack_output, dtype=self.typeCode)
      x.shape = (2, 3, 4)
      y = x.copy()
      process(y)
      self.assertEqual(np.all((x + 1) == y), True)
  
imports: import sys
  import unittest
  import struct
  import numpy
  import Flat
label_desc: Use image node_id 3 for calling the FlatTestCase obj's underlying member method code with example usage: obj.testProcess3D() without return types