def test_first_letter_is_constant(self):
"""Every value created should start with the first letter of the
search input (You are less likely to mess up the first letter
and not realize it"""
name = 'ben'
return_val = utils.all_variations(name)
for val in return_val:
assert val[0] == name[0]
def test_number_vals_returned(self):
"""for each letter (other than the first letter) there should be
26 variations for changes in a letter, 26 for adding a letter,
and 1 for removing the letter, and also add the original input
giving a total of (len(input) - 1) * 53 + 1 changes """
name = 'ben'
return_val = utils.all_variations(name)
assert len(return_val), (len(name) - 1) * 53 + 1
def test_initial_name_present(self):
"""initial name should be returned"""
name = 'ben'
return_val = utils.all_variations(name)
assert name in return_val
def test_remove_letter(self):
"""letter can be removed"""
name = 'ben'
return_val = utils.all_variations(name)
assert 'bn' in return_val
def test_add_letter(self):
"""Can add letter and still get proper values"""
name = 'ben'
return_val = utils.all_variations(name)
assert 'bean' in return_val
assert 'baen' in return_val
def test_last_letter_changed(self):
"""Last letter can be deleted or changed"""
name = 'ben'
return_val = utils.all_variations(name)
assert 'bek' in return_val
assert 'be' in return_val
def test_singleton_string(self):
"""string of length 1 should return a list consisting of just
itself"""
name = 'b'
return_val = utils.all_variations(name)
assert return_val == [name]
def test_none(self):
"""input = None should return empty list"""
name = None
return_val = utils.all_variations(name)
assert return_val == []
def test_empty_string(self):
"""empty string should return empty list"""
name = ''
return_val = utils.all_variations(name)
assert return_val == []