def test_fmt_thousands_integer_value_error():
"""
It should raise a ValueError if the value does not represent a valid integer.
"""
csv_formatter = CsvFormatter({})
for test_case in ('bad', None):
try:
csv_formatter._fmt_thousands_integer(test_case)
msg = 'The _fmt_thousands_integer must raise an exception when the value is not a representation of an integer'
assert False, format_msg(msg)
except ValueError as e:
if not e.args:
msg = 'It is expected that the ValueError exception include a descriptive message, but none was provided'
assert False, format_msg(msg)
expected_message = 'The value "{:s}" is not valid for the thousands_integer formatter'.format(
str(test_case))
msg = 'The exception message did not match the expected message: Your message: {:s} != Expected message {:s}'.format(
e.args[0], expected_message)
assert expected_message == e.args[0], format_msg(msg)
def test_fmt_thousands_integer():
"""
It should return a value formatted as an integer with commas grouping thousands.
"""
csv_formatter = CsvFormatter({})
expected_result = '12,345'
result = csv_formatter._fmt_thousands_integer('12345')
msg = 'The _fmt_thousands_integer method must return a formatted string, not None'
assert result is not None, format_msg(msg)
msg = 'The expected result was not produced: Your result: {:s} != Expected result: {:s}'.format(
result, expected_result)
assert result == expected_result, format_msg(msg)
