old_contents: import pytest
  
  from eche.reader import read_str
  from eche.printer import print_str
  
  import math
  
  
  @pytest.mark.parametrize("test_input", [
      '1',
      '-1',
      '0',
      str(math.pi),
      str(math.e)
  ])
  def test_numbers(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      '*',
      '+',
      'abc',
      'test1',
      'abc-def',
  ])
  def test_eche_type_symbol(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      '()',
      '(* 1 2)',
      '(+ (* 1 5) (/ 1 0))'
  ])
  def test_eche_type_list(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      'nil',
  ])
  def test_nil(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      'true',
      'false',
  ])
  def test_bool(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  
new_contents: import pytest
  
  from eche.reader import read_str
  from eche.printer import print_str
  
  import math
  
  
  @pytest.mark.parametrize("test_input", [
      '1',
      '-1',
      '0',
      str(math.pi),
      str(math.e)
  ])
  def test_numbers(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      '*',
      '+',
      'abc',
      'test1',
      'abc-def',
  ])
  def test_eche_type_symbol(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      '((9 8))',
      '()',
      '(* 1 2)',
      '(+ (* 1 5) (/ 1 0))'
  ])
  def test_eche_type_list(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      'nil',
  ])
  def test_nil(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  @pytest.mark.parametrize("test_input", [
      'true',
      'false',
  ])
  def test_bool(test_input):
      assert print_str(read_str(test_input)) == test_input
  
  
  
subject: Add list with list test.