def test_format_empty_interval(self):
numbers = []
formatted_interval = IntervalsFormatter.format(numbers)
self.assertEqual("[]", formatted_interval)
def test_given_interval_is_not_changed(self):
original_numbers = [2, 1, 4, 3, 6, 5]
numbers = [2, 1, 4, 3, 6, 5]
IntervalsFormatter.format(numbers)
self.assertEqual(original_numbers, numbers)
def test_format_unsorted_interval(self):
numbers = [2, 1, 4, 3, 6, 5]
formatted_interval = IntervalsFormatter.format(numbers)
self.assertEqual("[1-6]", formatted_interval)
def test_format_interval_with_many_items(self):
numbers = [1, 2, 3, 4, 5, 6]
formatted_interval = IntervalsFormatter.format(numbers)
self.assertEqual("[1-6]", formatted_interval)
def test_format_interval_with_two_items(self):
numbers = [1, 2]
formatted_interval = IntervalsFormatter.format(numbers)
self.assertEqual("[1-2]", formatted_interval)
def test_format_interval_with_single_item(self):
numbers = [1]
formatted_interval = IntervalsFormatter.format(numbers)
self.assertEqual("[1]", formatted_interval)
