def test_add_operator(self): assert NumberRange(1, 2) + NumberRange(1, 2) == NumberRange(2, 4)
def test_raises_exception_for_badly_constructed_range(): with raises(NumberRangeException): NumberRange(3, 2)
def test_from_str_exception_handling(): with raises(NumberRangeException): NumberRange('1 - ')
def test_le_operator(self): assert NumberRange(0, 2) <= NumberRange(1, 3) assert NumberRange(1, 3) >= NumberRange(1, 3)
def test_str_representation(): assert str(NumberRange(1, 3)) == '1 - 3' assert str(NumberRange(1, 1)) == '1'
def test_iadd_operator(self): range_ = NumberRange(1, 2) range_ += NumberRange(1, 2) assert range_ == NumberRange(2, 4)
def test_lt_operator(self): assert NumberRange(0, 2) < NumberRange(1, 3) assert not NumberRange(2, 3) < NumberRange(2, 3)
def test_ne_operator(self): assert not NumberRange(1, 3) != NumberRange(1, 3) assert NumberRange(1, 3) != NumberRange(1, 4)
def test_support_range_object(self): num_range = NumberRange(NumberRange(1, 3)) assert num_range.lower == 1 assert num_range.upper == 3
def test_supports_integers(self): num_range = NumberRange(3) assert num_range.lower == 3 assert num_range.upper == 3
def test_eq_operator(self): assert NumberRange(1, 3) == NumberRange(1, 3) assert not NumberRange(1, 3) == NumberRange(1, 4)
def test_supports_exact_ranges_as_strings(self): num_range = NumberRange('3') assert num_range.lower == 3 assert num_range.upper == 3
def test_supports_strings_with_bounds(self): num_range = NumberRange('[1, 3]') assert num_range.lower == 1 assert num_range.upper == 3
def test_supports_strings_with_spaces(self): num_range = NumberRange('1 - 3') assert num_range.lower == 1 assert num_range.upper == 3
def test_sub_operator(self): assert NumberRange(1, 3) - NumberRange(1, 2) == NumberRange(0, 1)
def test_gt_operator(self): assert NumberRange(1, 3) > NumberRange(0, 2) assert not NumberRange(2, 3) > NumberRange(2, 3)
def test_isub_operator(self): range_ = NumberRange(1, 3) range_ -= NumberRange(1, 2) assert range_ == NumberRange(0, 1)
def test_supports_multiple_args(self): num_range = NumberRange(1, 3) assert num_range.lower == 1 assert num_range.upper == 3