docstr: Test pad for odd footprints in 2D
code: def test_pad_odd(self):
      "Test pad for odd footprints in 2D"
      input = numpy.asarray([[1, 3, 4], [2, 2, 2]])
      size = 3
  
      expected = numpy.asarray(
          [
              [2, 2, 2, 2, 2],
              [3, 1, 3, 4, 3],
              [2, 2, 2, 2, 2],
              [3, 1, 3, 4, 3],
          ]
      )
      result = pad(input=input, size=size, mode="mirror")
      self.assertTrue(numpy.all(result == expected))
  
      expected = numpy.asarray(
          [
              [1, 1, 3, 4, 4],
              [1, 1, 3, 4, 4],
              [2, 2, 2, 2, 2],
              [2, 2, 2, 2, 2],
          ]
      )
      result = pad(input=input, size=size, mode="reflect")
      self.assertTrue(numpy.all(result == expected))
  
      expected = numpy.asarray(
          [
              [2, 2, 2, 2, 2],
              [4, 1, 3, 4, 1],
              [2, 2, 2, 2, 2],
              [4, 1, 3, 4, 1],
          ]
      )
      result = pad(input=input, size=size, mode="wrap")
      self.assertTrue(numpy.all(result == expected))
  
      expected = numpy.asarray(
          [
              [1, 1, 3, 4, 4],
              [1, 1, 3, 4, 4],
              [2, 2, 2, 2, 2],
              [2, 2, 2, 2, 2],
          ]
      )
      result = pad(input=input, size=size, mode="nearest")
      numpy.testing.assert_array_equal(result, expected)
      self.assertTrue(numpy.all(result == expected))
  
      expected = numpy.asarray(
          [
              [0, 0, 0, 0, 0],
              [0, 1, 3, 4, 0],
              [0, 2, 2, 2, 0],
              [0, 0, 0, 0, 0],
          ]
      )
      result = pad(input=input, size=size, mode="constant", cval=0)
      self.assertTrue(numpy.all(result == expected))
  
      expected = numpy.asarray(
          [
              [9, 9, 9, 9, 9],
              [9, 1, 3, 4, 9],
              [9, 2, 2, 2, 9],
              [9, 9, 9, 9, 9],
          ]
      )
      result = pad(input=input, size=size, mode="constant", cval=9)
      self.assertTrue(numpy.all(result == expected))
  
file_path: medpy/tests/filter_/utilities.py
imports: import unittest
  import numpy
  from medpy.filter import pad
label_desc: Use image node_id 3 for calling the TestUtilities obj's underlying member method code with example usage: obj.test_pad_odd() without return types