old_contents: from __future__ import division
  import pytest
  
  from stringtopy import str_to_float_converter
  
  
  def test_not_float(default_str_to_float):
      with pytest.raises(ValueError):
          default_str_to_float("this is not a float")
  
  def test_not_float_with_none():
      str_to_float = str_to_float_converter(use_none_on_fail=True)
      assert str_to_float("this is not a float") is None
  
  def test_decimal(default_str_to_float):
      assert 1.234 == default_str_to_float("1.234")
  
  def test_exp_notation(default_str_to_float):
      assert 5.76e7 == default_str_to_float("5.76e7")
  
  def test_fraction(default_str_to_float):
      assert 3 / 2 == default_str_to_float("3/2")
  
  @pytest.mark.xfail
  def test_fraction_with_spaces(default_str_to_float):
      assert 3 / 2 == default_str_to_float("3 / 2")
  
new_contents: from __future__ import division
  import pytest
  
  from stringtopy import str_to_float_converter
  
  
  def test_not_float(default_str_to_float):
      with pytest.raises(ValueError):
          default_str_to_float("this is not a float")
  
  def test_not_float_with_none():
      str_to_float = str_to_float_converter(use_none_on_fail=True)
      assert str_to_float("this is not a float") is None
  
  def test_decimal(default_str_to_float):
      assert default_str_to_float("1.234") == 1.234
  
  def test_exp_notation(default_str_to_float):
      assert default_str_to_float("5.76e7") == 5.76e7
  
  def test_fraction(default_str_to_float):
      assert 3 / 2 == default_str_to_float("3/2")
  
  @pytest.mark.xfail
  def test_fraction_with_spaces(default_str_to_float):
      assert 3 / 2 == default_str_to_float("3 / 2")
  
subject: Fix comparison constant position