} else if offsetEnd < 0 {
			return nil, fmt.Errorf("Last byte position is negative ('%d')", offsetEnd)
		}
	}

	switch {
	case offsetBegin > -1 && offsetEnd > -1:
		if offsetBegin > offsetEnd {
			return nil, errInvalidRange
		}
		return &HTTPRangeSpec{false, offsetBegin, offsetEnd}, nil
	case offsetBegin > -1:
		return &HTTPRangeSpec{false, offsetBegin, -1}, nil

		}

		if start != successCase.offsetBegin {
			t.Fatalf("expected: %d, got: %d", successCase.offsetBegin, start)
		}

		if start+length-1 != successCase.offsetEnd {
			t.Fatalf("expected: %d, got: %d", successCase.offsetEnd, start+length-1)
		}
	}

	// Test invalid range strings.
	invalidRangeStrings := []string{
		"bytes=8",
		"bytes=5-2",
		"bytes=+2-5",
		"bytes=2-+5",
		"bytes=2--5",

}

// InvalidRange - invalid range typed error.
type InvalidRange struct {
	OffsetBegin  int64
	OffsetEnd    int64
	ResourceSize int64
}

func (e InvalidRange) Error() string {
	return fmt.Sprintf("The requested range 'bytes=%d-%d' is not satisfiable", e.OffsetBegin, e.OffsetEnd)
}

// ObjectTooLarge error returned when the size of the object > max object size allowed (5G) per request.

				Description:    e.Error(),
				HTTPStatusCode: errorCodes[ErrInvalidRange].HTTPStatusCode,
				ObjectSize:     strconv.FormatInt(e.ResourceSize, 10),
				RangeRequested: fmt.Sprintf("%d-%d", e.OffsetBegin, e.OffsetEnd),
			}
		case InvalidArgument:
			apiErr = APIError{
				Code:           "InvalidArgument",
				Description:    e.Error(),
				HTTPStatusCode: errorCodes[ErrInvalidRequest].HTTPStatusCode,
			}