code: def test_get_validation_batches_requesting_more_than_available(self):
      patch_size = 3
      with patch("os.listdir", side_effect=self.fake_folders):
          with patch(
              "ISR.utils.datahandler.DataHandler._check_dataset",
              return_value=True,
          ):
              try:
                  DH = DataHandler(
                      lr_dir={"res": "lr", "matching": True},
                      hr_dir={"res": "hr", "matching": True},
                      patch_size=patch_size,
                      scale=2,
                      n_validation_samples=10,
                  )
              except:
                  self.assertTrue(True)
              else:
                  self.assertTrue(False)
  
imports: import unittest
  import numpy
  from unittest.mock import patch
  from ISR.utils.datahandler import DataHandler
label_desc: Use image node_id 17 for calling the DataHandlerTest obj's underlying member method code with example usage: obj.test_get_validation_batches_requesting_more_than_available() without return types