text: """Test hook block rewrite logic in tackle.parser handle_empty_blocks()."""
  import pytest
  import os
  import yaml
  
  from tackle import tackle
  from tackle.exceptions import EmptyBlockException
  
  FIXTURES = [
      ('single-level.yaml', 'single-level-output.yaml'),
      ('nested-dict.yaml', 'nested-dict-output.yaml'),
      ('nested-for.yaml', 'nested-for-output.yaml'),
  ]
  
  
  @pytest.mark.parametrize("input,output", FIXTURES)
  def test_parser_blocks_validate_output(chdir, input, output):
      """Test blocks."""
      chdir(os.path.join("fixtures", "blocks"))
      with open(output) as f:
          expected_output = yaml.safe_load(f)
  
      tackle_output = tackle(input)
      assert tackle_output == expected_output
  
  
  ERROR_SOURCES = [
      ("empty-block-exception.yaml", EmptyBlockException),
      # ("")
  ]
  
  
  @pytest.mark.parametrize("input_file,exception", ERROR_SOURCES)
  def test_parser_raises_exceptions(chdir, input_file, exception):
      """Validate that exceptions are raised."""
      chdir(os.path.join("fixtures", "blocks"))
      with pytest.raises(exception):
          tackle(input_file)
  