def test_account_number_invalid_bad_character():
all_lines = (' ' * 8 + ' x23456', )
assert account_number(all_lines, 0) is not None
def test_account_number_invalid_all_zeroes():
all_lines = (' ' * 8 + '0' * 9, )
assert account_number(all_lines, 0) is not None
def test_account_number_invalid_left_justified():
all_lines = (' ' * 8 + '123456 ', )
assert account_number(all_lines, 0) is not None
def test_account_number_valid_employee_benefits_card():
all_lines = (' ' * 8 + ' 999999', ) # for employee benefits card transactions, account number must be '999999'
assert account_number(all_lines, 0) is None
def test_account_number_valid_blank():
all_lines = (' ' * 8 + ' ' * 9, ) # for credit card transactions the account number can be blank
assert account_number(all_lines, 0) is None
def test_account_number_valid_nine_digits():
all_lines = (' ' * 8 + '123456789', )
assert account_number(all_lines, 0) is None
def test_account_number_valid_eight_digits_with_hyphen():
all_lines = (' ' * 8 + '1234-5678', )
assert account_number(all_lines, 0) is None