class_docstr: Test FASTQLoader
code: def test_fastq_one_hot(self):
      input_file = os.path.join(self.current_dir, "sample1.fastq")
      loader = FASTQLoader()
      sequences = loader.create_dataset(input_file)
      # Default file contains 4 sequences each of length 192 (excluding the end of line character '\n').
      # The one-hot encoding turns base-pairs into vectors of length 5 (ATCGN).
      # Expected shape is now (4, 192, 5)
      assert sequences.X.shape == (4, 192, 5)
  
imports: import os
  import unittest
  from deepchem.data.data_loader import FASTQLoader
label_desc: Use image node_id 2 for calling the TestFASTQLoader obj's underlying member method code with example usage: obj.test_fastq_one_hot() without return types